/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:20:24,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:20:24,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:20:24,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:20:24,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:20:24,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:20:24,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:20:24,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:20:24,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:20:24,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:20:24,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:20:24,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 16:20:24,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:20:24,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:20:24,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:20:24,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 16:20:24,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:20:24,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:20:24,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:20:24,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:20:24,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:20:24,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:20:24,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:20:24,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:20:24,242 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:20:24,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:20:24,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:20:24,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:20:24,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:20:24,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:20:24,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:20:24,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:20:24,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:20:24,247 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:20:24,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:20:24,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:20:24,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:20:24,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:20:24,511 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:20:24,512 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:20:24,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl [2022-01-18 16:20:24,513 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl' [2022-01-18 16:20:24,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:20:24,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:20:24,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:20:24,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:20:24,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:20:24,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,578 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:20:24,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:20:24,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:20:24,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:20:24,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:20:24,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:20:24,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:20:24,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:20:24,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:20:24,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/1) ... [2022-01-18 16:20:24,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:20:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:24,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 16:20:24,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 16:20:24,682 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:20:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:20:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:20:24,683 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:20:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:20:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:20:24,683 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:20:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:20:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:20:24,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:20:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:20:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:20:24,684 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:20:24,731 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:20:24,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:20:24,859 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:20:24,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:20:24,877 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:20:24,879 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:20:24 BoogieIcfgContainer [2022-01-18 16:20:24,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:20:24,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:20:24,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:20:24,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:20:24,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:20:24" (1/2) ... [2022-01-18 16:20:24,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d496443 and model type queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:20:24, skipping insertion in model container [2022-01-18 16:20:24,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:20:24" (2/2) ... [2022-01-18 16:20:24,886 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3.wvr.bpl [2022-01-18 16:20:24,890 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:20:24,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:20:24,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:20:24,891 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:20:24,937 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 16:20:24,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:20:25,017 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:20:25,017 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 16:20:25,035 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2022-01-18 16:20:25,164 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:20:25,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:25,192 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] [2022-01-18 16:20:25,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1932412713, now seen corresponding path program 1 times [2022-01-18 16:20:25,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:25,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788503325] [2022-01-18 16:20:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:25,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:25,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788503325] [2022-01-18 16:20:25,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788503325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:20:25,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:20:25,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:20:25,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036368444] [2022-01-18 16:20:25,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:20:25,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:20:25,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:20:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:20:25,412 INFO L87 Difference]: Start difference. First operand has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:25,498 INFO L93 Difference]: Finished difference Result 732 states and 2170 transitions. [2022-01-18 16:20:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:20:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:20:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:25,525 INFO L225 Difference]: With dead ends: 732 [2022-01-18 16:20:25,525 INFO L226 Difference]: Without dead ends: 732 [2022-01-18 16:20:25,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:20:25,533 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:25,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:20:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-18 16:20:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2022-01-18 16:20:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.9685362517099865) internal successors, (2170), 731 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2170 transitions. [2022-01-18 16:20:25,678 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2170 transitions. Word has length 21 [2022-01-18 16:20:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:25,679 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2170 transitions. [2022-01-18 16:20:25,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2170 transitions. [2022-01-18 16:20:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:20:25,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:25,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:25,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:20:25,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash -266632058, now seen corresponding path program 1 times [2022-01-18 16:20:25,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610670665] [2022-01-18 16:20:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:25,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:25,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:25,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610670665] [2022-01-18 16:20:25,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610670665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:20:25,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:20:25,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:20:25,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433406778] [2022-01-18 16:20:25,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:20:25,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:20:25,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:20:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:20:25,754 INFO L87 Difference]: Start difference. First operand 732 states and 2170 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:25,782 INFO L93 Difference]: Finished difference Result 851 states and 2466 transitions. [2022-01-18 16:20:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:20:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-01-18 16:20:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:25,787 INFO L225 Difference]: With dead ends: 851 [2022-01-18 16:20:25,787 INFO L226 Difference]: Without dead ends: 769 [2022-01-18 16:20:25,787 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 [2022-01-18 16:20:25,789 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:25,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:20:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-18 16:20:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2022-01-18 16:20:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.91796875) internal successors, (2241), 768 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2241 transitions. [2022-01-18 16:20:25,812 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2241 transitions. Word has length 25 [2022-01-18 16:20:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:25,812 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2241 transitions. [2022-01-18 16:20:25,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2241 transitions. [2022-01-18 16:20:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:20:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:25,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:25,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:20:25,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash 356875260, now seen corresponding path program 1 times [2022-01-18 16:20:25,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610402630] [2022-01-18 16:20:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:25,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:26,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610402630] [2022-01-18 16:20:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610402630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588718063] [2022-01-18 16:20:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:26,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:26,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:26,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:20:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:20:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:26,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588718063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:26,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:26,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 16:20:26,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095269135] [2022-01-18 16:20:26,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:26,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:20:26,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:20:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:20:26,646 INFO L87 Difference]: Start difference. First operand 769 states and 2241 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:27,168 INFO L93 Difference]: Finished difference Result 1791 states and 5134 transitions. [2022-01-18 16:20:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:20:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 30 [2022-01-18 16:20:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:27,178 INFO L225 Difference]: With dead ends: 1791 [2022-01-18 16:20:27,178 INFO L226 Difference]: Without dead ends: 1732 [2022-01-18 16:20:27,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:20:27,183 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 249 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:27,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 413 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:20:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-01-18 16:20:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1087. [2022-01-18 16:20:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.8683241252302025) internal successors, (3115), 1086 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3115 transitions. [2022-01-18 16:20:27,221 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3115 transitions. Word has length 30 [2022-01-18 16:20:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:27,222 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 3115 transitions. [2022-01-18 16:20:27,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3115 transitions. [2022-01-18 16:20:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:20:27,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:27,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:27,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:27,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:27,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:27,440 INFO L85 PathProgramCache]: Analyzing trace with hash -151725802, now seen corresponding path program 2 times [2022-01-18 16:20:27,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291759710] [2022-01-18 16:20:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:27,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:27,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291759710] [2022-01-18 16:20:27,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291759710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17622075] [2022-01-18 16:20:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:27,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:27,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:27,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:20:27,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:20:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:27,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:28,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17622075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:28,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:28,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:20:28,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276226661] [2022-01-18 16:20:28,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:20:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:20:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:20:28,037 INFO L87 Difference]: Start difference. First operand 1087 states and 3115 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:28,608 INFO L93 Difference]: Finished difference Result 2322 states and 6672 transitions. [2022-01-18 16:20:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:20:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 16:20:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:28,620 INFO L225 Difference]: With dead ends: 2322 [2022-01-18 16:20:28,620 INFO L226 Difference]: Without dead ends: 2263 [2022-01-18 16:20:28,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:20:28,622 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 289 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:28,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 453 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:20:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-01-18 16:20:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1130. [2022-01-18 16:20:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.906997342781222) internal successors, (3282), 1129 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3282 transitions. [2022-01-18 16:20:28,666 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3282 transitions. Word has length 30 [2022-01-18 16:20:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:28,666 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 3282 transitions. [2022-01-18 16:20:28,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3282 transitions. [2022-01-18 16:20:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:20:28,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:28,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:28,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:28,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 16:20:28,880 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1395086798, now seen corresponding path program 3 times [2022-01-18 16:20:28,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:28,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102738742] [2022-01-18 16:20:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:28,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:28,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102738742] [2022-01-18 16:20:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102738742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:20:28,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:20:28,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:20:28,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767063072] [2022-01-18 16:20:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:20:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:20:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:20:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:20:28,907 INFO L87 Difference]: Start difference. First operand 1130 states and 3282 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:28,928 INFO L93 Difference]: Finished difference Result 999 states and 2818 transitions. [2022-01-18 16:20:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:20:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-01-18 16:20:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:28,936 INFO L225 Difference]: With dead ends: 999 [2022-01-18 16:20:28,940 INFO L226 Difference]: Without dead ends: 999 [2022-01-18 16:20:28,941 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 [2022-01-18 16:20:28,942 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:28,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:20:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-01-18 16:20:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 999. [2022-01-18 16:20:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.823647294589178) internal successors, (2818), 998 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2818 transitions. [2022-01-18 16:20:28,994 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2818 transitions. Word has length 30 [2022-01-18 16:20:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:28,995 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 2818 transitions. [2022-01-18 16:20:28,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2818 transitions. [2022-01-18 16:20:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:20:28,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:28,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:28,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:20:28,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1816936678, now seen corresponding path program 4 times [2022-01-18 16:20:28,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038978465] [2022-01-18 16:20:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:28,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:29,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038978465] [2022-01-18 16:20:29,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038978465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766887980] [2022-01-18 16:20:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:29,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:29,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:20:29,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:20:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:29,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766887980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:29,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:29,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 16:20:29,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080640887] [2022-01-18 16:20:29,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:29,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:20:29,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:20:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:20:29,491 INFO L87 Difference]: Start difference. First operand 999 states and 2818 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:30,012 INFO L93 Difference]: Finished difference Result 1624 states and 4542 transitions. [2022-01-18 16:20:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:20:30,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 16:20:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:30,019 INFO L225 Difference]: With dead ends: 1624 [2022-01-18 16:20:30,020 INFO L226 Difference]: Without dead ends: 1579 [2022-01-18 16:20:30,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:20:30,021 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 225 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:30,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 680 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:20:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-01-18 16:20:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 975. [2022-01-18 16:20:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.8213552361396306) internal successors, (2748), 974 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2748 transitions. [2022-01-18 16:20:30,048 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2748 transitions. Word has length 30 [2022-01-18 16:20:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2748 transitions. [2022-01-18 16:20:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2748 transitions. [2022-01-18 16:20:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:30,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:30,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:30,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:30,267 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 [2022-01-18 16:20:30,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 977604255, now seen corresponding path program 1 times [2022-01-18 16:20:30,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695598275] [2022-01-18 16:20:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:30,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:30,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695598275] [2022-01-18 16:20:30,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695598275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019332029] [2022-01-18 16:20:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:30,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:30,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:30,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:20:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:30,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:20:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:30,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:30,507 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:20:30,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-01-18 16:20:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019332029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:30,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:30,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 16:20:30,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782694527] [2022-01-18 16:20:30,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:20:30,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:20:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:20:30,517 INFO L87 Difference]: Start difference. First operand 975 states and 2748 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:30,602 INFO L93 Difference]: Finished difference Result 1251 states and 3576 transitions. [2022-01-18 16:20:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:20:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:30,608 INFO L225 Difference]: With dead ends: 1251 [2022-01-18 16:20:30,608 INFO L226 Difference]: Without dead ends: 1251 [2022-01-18 16:20:30,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:20:30,609 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:30,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:20:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-01-18 16:20:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1182. [2022-01-18 16:20:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.852667231160034) internal successors, (3369), 1181 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3369 transitions. [2022-01-18 16:20:30,637 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3369 transitions. Word has length 33 [2022-01-18 16:20:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:30,638 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3369 transitions. [2022-01-18 16:20:30,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3369 transitions. [2022-01-18 16:20:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:20:30,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:30,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:30,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:30,863 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 [2022-01-18 16:20:30,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash 455388953, now seen corresponding path program 5 times [2022-01-18 16:20:30,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:30,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875123177] [2022-01-18 16:20:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:30,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:30,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875123177] [2022-01-18 16:20:30,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875123177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887982823] [2022-01-18 16:20:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:30,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:30,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:30,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:20:30,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:20:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:20:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:31,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:20:31,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887982823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:20:31,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:20:31,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-01-18 16:20:31,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943923985] [2022-01-18 16:20:31,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:20:31,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:20:31,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:20:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:20:31,065 INFO L87 Difference]: Start difference. First operand 1182 states and 3369 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:31,101 INFO L93 Difference]: Finished difference Result 2091 states and 5916 transitions. [2022-01-18 16:20:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:20:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:20:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:31,110 INFO L225 Difference]: With dead ends: 2091 [2022-01-18 16:20:31,111 INFO L226 Difference]: Without dead ends: 2023 [2022-01-18 16:20:31,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:20:31,111 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:31,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 64 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:20:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-01-18 16:20:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1796. [2022-01-18 16:20:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.8924791086350976) internal successors, (5192), 1795 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 5192 transitions. [2022-01-18 16:20:31,159 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 5192 transitions. Word has length 34 [2022-01-18 16:20:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:31,160 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 5192 transitions. [2022-01-18 16:20:31,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 5192 transitions. [2022-01-18 16:20:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:20:31,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:31,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:31,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:31,379 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 [2022-01-18 16:20:31,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash 618223433, now seen corresponding path program 2 times [2022-01-18 16:20:31,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:31,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606941144] [2022-01-18 16:20:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:31,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606941144] [2022-01-18 16:20:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606941144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661794741] [2022-01-18 16:20:31,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:31,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:31,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:31,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:20:31,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:31,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:20:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:31,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:20:31,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:31,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:31,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:31,664 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 17 [2022-01-18 16:20:31,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:31,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 16:20:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661794741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:31,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:31,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 16:20:31,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000164199] [2022-01-18 16:20:31,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:31,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:20:31,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:20:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:20:31,770 INFO L87 Difference]: Start difference. First operand 1796 states and 5192 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:32,066 INFO L93 Difference]: Finished difference Result 2323 states and 6719 transitions. [2022-01-18 16:20:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:20:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:20:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:32,077 INFO L225 Difference]: With dead ends: 2323 [2022-01-18 16:20:32,077 INFO L226 Difference]: Without dead ends: 2323 [2022-01-18 16:20:32,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:20:32,078 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 213 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:32,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 529 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:20:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-01-18 16:20:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1767. [2022-01-18 16:20:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 2.9773499433748585) internal successors, (5258), 1766 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 5258 transitions. [2022-01-18 16:20:32,125 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 5258 transitions. Word has length 38 [2022-01-18 16:20:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:32,126 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 5258 transitions. [2022-01-18 16:20:32,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 5258 transitions. [2022-01-18 16:20:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:20:32,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:32,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:32,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:32,351 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 [2022-01-18 16:20:32,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1246086473, now seen corresponding path program 6 times [2022-01-18 16:20:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965159005] [2022-01-18 16:20:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:32,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:32,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965159005] [2022-01-18 16:20:32,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965159005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758692907] [2022-01-18 16:20:32,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:20:32,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:32,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:32,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:20:32,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:20:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:32,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:20:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:32,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:32,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:32,597 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:20:32,597 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 12 treesize of output 11 [2022-01-18 16:20:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758692907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:32,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 7 [2022-01-18 16:20:32,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769298129] [2022-01-18 16:20:32,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:20:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:20:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:20:32,605 INFO L87 Difference]: Start difference. First operand 1767 states and 5258 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:32,688 INFO L93 Difference]: Finished difference Result 2051 states and 5911 transitions. [2022-01-18 16:20:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:20:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:20:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:32,697 INFO L225 Difference]: With dead ends: 2051 [2022-01-18 16:20:32,697 INFO L226 Difference]: Without dead ends: 1746 [2022-01-18 16:20:32,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:20:32,698 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 62 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:32,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 255 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:20:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-01-18 16:20:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1746. [2022-01-18 16:20:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.9707736389684816) internal successors, (5184), 1745 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5184 transitions. [2022-01-18 16:20:32,737 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5184 transitions. Word has length 39 [2022-01-18 16:20:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:32,737 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 5184 transitions. [2022-01-18 16:20:32,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5184 transitions. [2022-01-18 16:20:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:32,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:32,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:32,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:32,967 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 [2022-01-18 16:20:32,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash 753004404, now seen corresponding path program 3 times [2022-01-18 16:20:32,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:32,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123976131] [2022-01-18 16:20:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:32,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:33,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123976131] [2022-01-18 16:20:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123976131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194359662] [2022-01-18 16:20:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:20:33,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:33,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:20:33,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:20:33,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:20:33,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:33,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:33,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:33,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:34,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:34,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 16:20:34,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:34,426 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 28 treesize of output 28 [2022-01-18 16:20:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194359662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:34,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:34,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-18 16:20:34,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625657431] [2022-01-18 16:20:34,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:20:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:20:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:20:34,522 INFO L87 Difference]: Start difference. First operand 1746 states and 5184 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:36,058 INFO L93 Difference]: Finished difference Result 3349 states and 9682 transitions. [2022-01-18 16:20:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:20:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:36,074 INFO L225 Difference]: With dead ends: 3349 [2022-01-18 16:20:36,074 INFO L226 Difference]: Without dead ends: 3227 [2022-01-18 16:20:36,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:20:36,075 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 509 mSDsluCounter, 2535 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:36,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1934 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:20:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-01-18 16:20:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2156. [2022-01-18 16:20:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.917401392111369) internal successors, (6287), 2155 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6287 transitions. [2022-01-18 16:20:36,133 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6287 transitions. Word has length 42 [2022-01-18 16:20:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:36,134 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 6287 transitions. [2022-01-18 16:20:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6287 transitions. [2022-01-18 16:20:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:36,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:36,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:36,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:36,361 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 [2022-01-18 16:20:36,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -621510208, now seen corresponding path program 4 times [2022-01-18 16:20:36,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819669466] [2022-01-18 16:20:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:36,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:36,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819669466] [2022-01-18 16:20:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819669466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778490820] [2022-01-18 16:20:36,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:36,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:36,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:36,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:20:36,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:20:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:36,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:20:36,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:37,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:37,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:37,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:37,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:37,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778490820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:37,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:37,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-01-18 16:20:37,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418918410] [2022-01-18 16:20:37,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:37,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:20:37,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:37,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:20:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:20:37,610 INFO L87 Difference]: Start difference. First operand 2156 states and 6287 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:39,075 INFO L93 Difference]: Finished difference Result 3742 states and 10742 transitions. [2022-01-18 16:20:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:20:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:39,091 INFO L225 Difference]: With dead ends: 3742 [2022-01-18 16:20:39,091 INFO L226 Difference]: Without dead ends: 3620 [2022-01-18 16:20:39,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:20:39,094 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 345 mSDsluCounter, 2895 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:39,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 2123 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:20:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2022-01-18 16:20:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2163. [2022-01-18 16:20:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.9167437557816838) internal successors, (6306), 2162 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 6306 transitions. [2022-01-18 16:20:39,166 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 6306 transitions. Word has length 42 [2022-01-18 16:20:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:39,166 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 6306 transitions. [2022-01-18 16:20:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 6306 transitions. [2022-01-18 16:20:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:39,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:39,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:39,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:39,394 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 [2022-01-18 16:20:39,394 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1795196488, now seen corresponding path program 5 times [2022-01-18 16:20:39,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56100567] [2022-01-18 16:20:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:39,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:39,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:39,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56100567] [2022-01-18 16:20:39,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56100567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:39,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76599724] [2022-01-18 16:20:39,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:39,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:39,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:39,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:39,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:20:39,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:20:39,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:20:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:39,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:39,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:20:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:40,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:40,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:40,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:20:40,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:40,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:40,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76599724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:40,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:40,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2022-01-18 16:20:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045169653] [2022-01-18 16:20:40,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:40,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:20:40,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:20:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:20:40,568 INFO L87 Difference]: Start difference. First operand 2163 states and 6306 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:41,860 INFO L93 Difference]: Finished difference Result 4335 states and 12332 transitions. [2022-01-18 16:20:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:20:41,860 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:41,872 INFO L225 Difference]: With dead ends: 4335 [2022-01-18 16:20:41,872 INFO L226 Difference]: Without dead ends: 4213 [2022-01-18 16:20:41,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=2475, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:20:41,874 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 427 mSDsluCounter, 2484 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:41,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1844 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:20:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2022-01-18 16:20:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 2248. [2022-01-18 16:20:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.9087672452158433) internal successors, (6536), 2247 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 6536 transitions. [2022-01-18 16:20:41,941 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 6536 transitions. Word has length 42 [2022-01-18 16:20:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:41,942 INFO L470 AbstractCegarLoop]: Abstraction has 2248 states and 6536 transitions. [2022-01-18 16:20:41,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 6536 transitions. [2022-01-18 16:20:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:41,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:41,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:41,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:42,166 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 [2022-01-18 16:20:42,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1033940890, now seen corresponding path program 6 times [2022-01-18 16:20:42,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:42,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678888855] [2022-01-18 16:20:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:42,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:42,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678888855] [2022-01-18 16:20:42,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678888855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623219280] [2022-01-18 16:20:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:20:42,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:42,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:42,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:20:42,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:20:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:20:42,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:42,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:42,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:42,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:43,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:43,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:43,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:43,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:43,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623219280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:43,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:43,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:20:43,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311054586] [2022-01-18 16:20:43,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:43,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:20:43,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:20:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:20:43,415 INFO L87 Difference]: Start difference. First operand 2248 states and 6536 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:44,949 INFO L93 Difference]: Finished difference Result 4137 states and 11891 transitions. [2022-01-18 16:20:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:20:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:44,959 INFO L225 Difference]: With dead ends: 4137 [2022-01-18 16:20:44,959 INFO L226 Difference]: Without dead ends: 4015 [2022-01-18 16:20:44,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=431, Invalid=3601, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:20:44,961 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 459 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:44,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1867 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:20:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2022-01-18 16:20:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2272. [2022-01-18 16:20:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.9114927344782036) internal successors, (6612), 2271 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 6612 transitions. [2022-01-18 16:20:45,025 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 6612 transitions. Word has length 42 [2022-01-18 16:20:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 6612 transitions. [2022-01-18 16:20:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 6612 transitions. [2022-01-18 16:20:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:45,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:45,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:45,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 16:20:45,255 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 [2022-01-18 16:20:45,255 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1447843540, now seen corresponding path program 7 times [2022-01-18 16:20:45,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39416197] [2022-01-18 16:20:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:45,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:45,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39416197] [2022-01-18 16:20:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39416197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725752389] [2022-01-18 16:20:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:20:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:45,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:45,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:20:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:20:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:45,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:45,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:46,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:46,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:46,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:46,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:46,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725752389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:46,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:46,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:20:46,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363527794] [2022-01-18 16:20:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:20:46,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:20:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:20:46,600 INFO L87 Difference]: Start difference. First operand 2272 states and 6612 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:48,446 INFO L93 Difference]: Finished difference Result 4836 states and 13796 transitions. [2022-01-18 16:20:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:20:48,447 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:48,459 INFO L225 Difference]: With dead ends: 4836 [2022-01-18 16:20:48,459 INFO L226 Difference]: Without dead ends: 4714 [2022-01-18 16:20:48,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=4342, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:20:48,461 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 486 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:48,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1802 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:20:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2022-01-18 16:20:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 2275. [2022-01-18 16:20:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.9124890061565525) internal successors, (6623), 2274 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6623 transitions. [2022-01-18 16:20:48,522 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6623 transitions. Word has length 42 [2022-01-18 16:20:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:48,522 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 6623 transitions. [2022-01-18 16:20:48,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6623 transitions. [2022-01-18 16:20:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:48,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:48,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:48,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 16:20:48,750 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 [2022-01-18 16:20:48,750 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1491438590, now seen corresponding path program 8 times [2022-01-18 16:20:48,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:48,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396676635] [2022-01-18 16:20:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:48,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:49,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396676635] [2022-01-18 16:20:49,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396676635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781061730] [2022-01-18 16:20:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:49,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:49,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:49,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:20:49,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:20:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:49,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:49,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:49,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:49,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:49,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:49,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:49,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:50,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781061730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:50,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:50,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:20:50,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340359074] [2022-01-18 16:20:50,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:50,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:20:50,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:20:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:20:50,014 INFO L87 Difference]: Start difference. First operand 2275 states and 6623 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:53,215 INFO L93 Difference]: Finished difference Result 6677 states and 19180 transitions. [2022-01-18 16:20:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:20:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:53,234 INFO L225 Difference]: With dead ends: 6677 [2022-01-18 16:20:53,234 INFO L226 Difference]: Without dead ends: 6555 [2022-01-18 16:20:53,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=761, Invalid=7611, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:20:53,238 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 657 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:53,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 2040 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:20:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2022-01-18 16:20:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 2311. [2022-01-18 16:20:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 2.9294372294372293) internal successors, (6767), 2310 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 6767 transitions. [2022-01-18 16:20:53,318 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 6767 transitions. Word has length 42 [2022-01-18 16:20:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:53,318 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 6767 transitions. [2022-01-18 16:20:53,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 6767 transitions. [2022-01-18 16:20:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:53,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:53,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:53,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:53,538 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 [2022-01-18 16:20:53,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2096947742, now seen corresponding path program 9 times [2022-01-18 16:20:53,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:53,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181180318] [2022-01-18 16:20:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:53,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:53,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181180318] [2022-01-18 16:20:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181180318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501823645] [2022-01-18 16:20:53,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:20:53,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:53,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:53,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:20:53,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:20:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:20:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:53,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:20:54,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:54,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:54,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:54,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:54,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:54,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501823645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:54,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:54,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:20:54,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058421711] [2022-01-18 16:20:54,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:54,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:20:54,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:20:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:20:54,746 INFO L87 Difference]: Start difference. First operand 2311 states and 6767 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:58,204 INFO L93 Difference]: Finished difference Result 6938 states and 20019 transitions. [2022-01-18 16:20:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 16:20:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:20:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:58,218 INFO L225 Difference]: With dead ends: 6938 [2022-01-18 16:20:58,218 INFO L226 Difference]: Without dead ends: 6816 [2022-01-18 16:20:58,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1006, Invalid=9296, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:20:58,221 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 737 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:58,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1582 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:20:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6816 states. [2022-01-18 16:20:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6816 to 2330. [2022-01-18 16:20:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 2.9373121511378275) internal successors, (6841), 2329 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 6841 transitions. [2022-01-18 16:20:58,296 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 6841 transitions. Word has length 42 [2022-01-18 16:20:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:58,296 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 6841 transitions. [2022-01-18 16:20:58,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 6841 transitions. [2022-01-18 16:20:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:20:58,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:58,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:58,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:58,539 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 [2022-01-18 16:20:58,539 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1589444126, now seen corresponding path program 10 times [2022-01-18 16:20:58,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:58,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421286971] [2022-01-18 16:20:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:58,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:20:58,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421286971] [2022-01-18 16:20:58,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421286971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836768595] [2022-01-18 16:20:58,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:58,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:58,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:58,800 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:58,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:20:58,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:20:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:58,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:59,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:20:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:59,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:59,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:59,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:20:59,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:59,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:20:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:20:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836768595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:59,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:20:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443781286] [2022-01-18 16:20:59,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:20:59,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:20:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:20:59,738 INFO L87 Difference]: Start difference. First operand 2330 states and 6841 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:03,455 INFO L93 Difference]: Finished difference Result 6756 states and 19556 transitions. [2022-01-18 16:21:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:21:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:03,465 INFO L225 Difference]: With dead ends: 6756 [2022-01-18 16:21:03,465 INFO L226 Difference]: Without dead ends: 6643 [2022-01-18 16:21:03,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1036, Invalid=8470, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:21:03,468 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 809 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:03,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 2341 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:21:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-01-18 16:21:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 2408. [2022-01-18 16:21:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.966348151225592) internal successors, (7140), 2407 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7140 transitions. [2022-01-18 16:21:03,534 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7140 transitions. Word has length 42 [2022-01-18 16:21:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 7140 transitions. [2022-01-18 16:21:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7140 transitions. [2022-01-18 16:21:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:03,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:03,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:03,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 16:21:03,761 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 [2022-01-18 16:21:03,761 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2146271250, now seen corresponding path program 11 times [2022-01-18 16:21:03,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464916689] [2022-01-18 16:21:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:03,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:03,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464916689] [2022-01-18 16:21:03,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464916689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:21:03,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:21:03,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:21:03,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724132976] [2022-01-18 16:21:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:21:03,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:21:03,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:21:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:21:03,789 INFO L87 Difference]: Start difference. First operand 2408 states and 7140 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2022-01-18 16:21:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:03,823 INFO L93 Difference]: Finished difference Result 5624 states and 16348 transitions. [2022-01-18 16:21:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:21:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 42 [2022-01-18 16:21:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:03,830 INFO L225 Difference]: With dead ends: 5624 [2022-01-18 16:21:03,830 INFO L226 Difference]: Without dead ends: 5361 [2022-01-18 16:21:03,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:21:03,831 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:03,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 70 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2022-01-18 16:21:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4595. [2022-01-18 16:21:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 2.994122768828907) internal successors, (13755), 4594 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 13755 transitions. [2022-01-18 16:21:03,949 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 13755 transitions. Word has length 42 [2022-01-18 16:21:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:03,949 INFO L470 AbstractCegarLoop]: Abstraction has 4595 states and 13755 transitions. [2022-01-18 16:21:03,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2022-01-18 16:21:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 13755 transitions. [2022-01-18 16:21:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:03,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:03,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:03,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-18 16:21:03,958 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1394449568, now seen corresponding path program 12 times [2022-01-18 16:21:03,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:03,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171588137] [2022-01-18 16:21:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:03,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:04,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171588137] [2022-01-18 16:21:04,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171588137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:04,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033942004] [2022-01-18 16:21:04,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:04,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:04,213 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:21:04,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:21:04,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:21:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:04,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:04,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:04,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:04,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:04,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:05,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:05,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:05,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033942004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:05,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:05,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:05,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732573981] [2022-01-18 16:21:05,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:05,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:05,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:05,092 INFO L87 Difference]: Start difference. First operand 4595 states and 13755 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:06,926 INFO L93 Difference]: Finished difference Result 6946 states and 20590 transitions. [2022-01-18 16:21:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:21:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:06,939 INFO L225 Difference]: With dead ends: 6946 [2022-01-18 16:21:06,940 INFO L226 Difference]: Without dead ends: 6725 [2022-01-18 16:21:06,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=4204, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:21:06,941 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 470 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:06,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1541 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:21:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2022-01-18 16:21:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 4600. [2022-01-18 16:21:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.994998912807132) internal successors, (13774), 4599 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 13774 transitions. [2022-01-18 16:21:07,037 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 13774 transitions. Word has length 42 [2022-01-18 16:21:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:07,037 INFO L470 AbstractCegarLoop]: Abstraction has 4600 states and 13774 transitions. [2022-01-18 16:21:07,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 13774 transitions. [2022-01-18 16:21:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:07,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:07,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:07,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:07,259 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1438044618, now seen corresponding path program 13 times [2022-01-18 16:21:07,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825892839] [2022-01-18 16:21:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:07,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:07,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:07,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825892839] [2022-01-18 16:21:07,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825892839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583954986] [2022-01-18 16:21:07,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:21:07,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:07,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:21:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:07,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:07,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:07,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:08,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:08,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:08,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:08,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583954986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:08,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:08,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932289295] [2022-01-18 16:21:08,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:08,419 INFO L87 Difference]: Start difference. First operand 4600 states and 13774 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:11,805 INFO L93 Difference]: Finished difference Result 10658 states and 31396 transitions. [2022-01-18 16:21:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:21:11,805 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:11,821 INFO L225 Difference]: With dead ends: 10658 [2022-01-18 16:21:11,822 INFO L226 Difference]: Without dead ends: 10437 [2022-01-18 16:21:11,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=743, Invalid=7267, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:21:11,824 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 541 mSDsluCounter, 3323 mSDsCounter, 0 mSdLazyCounter, 4105 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 4105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:11,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 2364 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 4105 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:21:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2022-01-18 16:21:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 4612. [2022-01-18 16:21:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9969637822598134) internal successors, (13819), 4611 states have internal predecessors, (13819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13819 transitions. [2022-01-18 16:21:11,969 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13819 transitions. Word has length 42 [2022-01-18 16:21:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:11,969 INFO L470 AbstractCegarLoop]: Abstraction has 4612 states and 13819 transitions. [2022-01-18 16:21:11,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13819 transitions. [2022-01-18 16:21:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:11,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:11,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:12,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:12,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:12,191 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:12,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2144625582, now seen corresponding path program 14 times [2022-01-18 16:21:12,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:12,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186976431] [2022-01-18 16:21:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:12,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:12,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186976431] [2022-01-18 16:21:12,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186976431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561333800] [2022-01-18 16:21:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:21:12,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:12,426 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:21:12,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:12,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:12,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:12,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:13,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:13,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:13,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:13,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561333800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:13,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669482730] [2022-01-18 16:21:13,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:13,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:13,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:13,328 INFO L87 Difference]: Start difference. First operand 4612 states and 13819 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:17,203 INFO L93 Difference]: Finished difference Result 11117 states and 32866 transitions. [2022-01-18 16:21:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 16:21:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:17,222 INFO L225 Difference]: With dead ends: 11117 [2022-01-18 16:21:17,222 INFO L226 Difference]: Without dead ends: 10896 [2022-01-18 16:21:17,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=992, Invalid=8908, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:21:17,223 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 647 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 3550 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 3658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:17,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 2007 Invalid, 3658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3550 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:21:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10896 states. [2022-01-18 16:21:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10896 to 4616. [2022-01-18 16:21:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.996749729144095) internal successors, (13830), 4615 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13830 transitions. [2022-01-18 16:21:17,342 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13830 transitions. Word has length 42 [2022-01-18 16:21:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:17,342 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 13830 transitions. [2022-01-18 16:21:17,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13830 transitions. [2022-01-18 16:21:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:17,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:17,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:17,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 16:21:17,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:17,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1536050154, now seen corresponding path program 15 times [2022-01-18 16:21:17,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316410446] [2022-01-18 16:21:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:17,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:17,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316410446] [2022-01-18 16:21:17,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316410446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970705602] [2022-01-18 16:21:17,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:17,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:17,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:17,798 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:17,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:21:17,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:21:17,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:21:17,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:17,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:18,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:18,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:18,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:18,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:18,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:18,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:18,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970705602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:18,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:18,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:18,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33001980] [2022-01-18 16:21:18,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:18,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:18,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:18,681 INFO L87 Difference]: Start difference. First operand 4616 states and 13830 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:21,959 INFO L93 Difference]: Finished difference Result 10825 states and 31854 transitions. [2022-01-18 16:21:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:21:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:21,976 INFO L225 Difference]: With dead ends: 10825 [2022-01-18 16:21:21,976 INFO L226 Difference]: Without dead ends: 10639 [2022-01-18 16:21:21,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=927, Invalid=7263, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:21:21,977 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 789 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 3670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:21,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 2027 Invalid, 3670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:21:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10639 states. [2022-01-18 16:21:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10639 to 4597. [2022-01-18 16:21:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2022-01-18 16:21:22,134 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2022-01-18 16:21:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:22,134 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2022-01-18 16:21:22,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2022-01-18 16:21:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:22,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:22,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:22,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:22,341 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash 509681886, now seen corresponding path program 16 times [2022-01-18 16:21:22,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:22,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694460211] [2022-01-18 16:21:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:22,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:22,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694460211] [2022-01-18 16:21:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694460211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505208518] [2022-01-18 16:21:22,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:22,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:22,568 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) [2022-01-18 16:21:22,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:21:22,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:22,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:22,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:22,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:22,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:23,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:23,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:23,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:23,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505208518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:23,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2022-01-18 16:21:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132052748] [2022-01-18 16:21:23,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:21:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:21:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:21:23,410 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:24,650 INFO L93 Difference]: Finished difference Result 6350 states and 18753 transitions. [2022-01-18 16:21:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:21:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:24,659 INFO L225 Difference]: With dead ends: 6350 [2022-01-18 16:21:24,660 INFO L226 Difference]: Without dead ends: 6129 [2022-01-18 16:21:24,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=352, Invalid=3308, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:21:24,661 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 450 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:24,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1157 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:21:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2022-01-18 16:21:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 4604. [2022-01-18 16:21:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4603 states have (on average 2.9941342602650445) internal successors, (13782), 4603 states have internal predecessors, (13782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 13782 transitions. [2022-01-18 16:21:24,769 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 13782 transitions. Word has length 42 [2022-01-18 16:21:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:24,769 INFO L470 AbstractCegarLoop]: Abstraction has 4604 states and 13782 transitions. [2022-01-18 16:21:24,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 13782 transitions. [2022-01-18 16:21:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:24,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:24,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:24,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:24,991 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,SelfDestructingSolverStorable23 [2022-01-18 16:21:24,991 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1734132946, now seen corresponding path program 17 times [2022-01-18 16:21:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751188500] [2022-01-18 16:21:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:24,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:25,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751188500] [2022-01-18 16:21:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751188500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864517607] [2022-01-18 16:21:25,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:25,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:25,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:25,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:25,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:21:25,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:21:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:25,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:25,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:25,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:25,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:25,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:21:25,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:25,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:26,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864517607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:26,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2022-01-18 16:21:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466618282] [2022-01-18 16:21:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:26,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:21:26,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:21:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:21:26,002 INFO L87 Difference]: Start difference. First operand 4604 states and 13782 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:27,326 INFO L93 Difference]: Finished difference Result 6875 states and 20047 transitions. [2022-01-18 16:21:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:21:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:27,336 INFO L225 Difference]: With dead ends: 6875 [2022-01-18 16:21:27,336 INFO L226 Difference]: Without dead ends: 6654 [2022-01-18 16:21:27,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3303, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:21:27,337 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 442 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:27,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1397 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:21:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2022-01-18 16:21:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 4597. [2022-01-18 16:21:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2022-01-18 16:21:27,404 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2022-01-18 16:21:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:27,404 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2022-01-18 16:21:27,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2022-01-18 16:21:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:27,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:27,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:27,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:27,621 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,SelfDestructingSolverStorable24 [2022-01-18 16:21:27,621 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1397255362, now seen corresponding path program 18 times [2022-01-18 16:21:27,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:27,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413784577] [2022-01-18 16:21:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:27,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:27,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413784577] [2022-01-18 16:21:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413784577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270508610] [2022-01-18 16:21:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:27,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:27,891 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:27,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:21:27,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:21:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:28,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:28,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:28,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:28,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:28,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:21:28,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:28,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:28,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270508610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:28,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:28,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:28,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856425809] [2022-01-18 16:21:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:28,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:28,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:28,805 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:32,239 INFO L93 Difference]: Finished difference Result 10896 states and 32285 transitions. [2022-01-18 16:21:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 16:21:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:32,256 INFO L225 Difference]: With dead ends: 10896 [2022-01-18 16:21:32,256 INFO L226 Difference]: Without dead ends: 10675 [2022-01-18 16:21:32,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=984, Invalid=8718, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:21:32,258 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 657 mSDsluCounter, 3023 mSDsCounter, 0 mSdLazyCounter, 3849 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 2173 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:21:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2022-01-18 16:21:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 4617. [2022-01-18 16:21:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.997833622183709) internal successors, (13838), 4616 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13838 transitions. [2022-01-18 16:21:32,378 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13838 transitions. Word has length 42 [2022-01-18 16:21:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:32,378 INFO L470 AbstractCegarLoop]: Abstraction has 4617 states and 13838 transitions. [2022-01-18 16:21:32,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13838 transitions. [2022-01-18 16:21:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:32,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:32,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:32,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:32,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 16:21:32,599 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2103836326, now seen corresponding path program 19 times [2022-01-18 16:21:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404653842] [2022-01-18 16:21:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:32,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:32,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404653842] [2022-01-18 16:21:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404653842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580410633] [2022-01-18 16:21:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:21:32,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:32,849 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:32,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:21:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:32,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:33,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:33,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:33,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:33,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:21:33,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:33,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:33,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580410633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:33,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:33,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:33,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873899776] [2022-01-18 16:21:33,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:33,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:33,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:33,680 INFO L87 Difference]: Start difference. First operand 4617 states and 13838 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:37,790 INFO L93 Difference]: Finished difference Result 11636 states and 34438 transitions. [2022-01-18 16:21:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 16:21:37,791 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:37,810 INFO L225 Difference]: With dead ends: 11636 [2022-01-18 16:21:37,810 INFO L226 Difference]: Without dead ends: 11415 [2022-01-18 16:21:37,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1231, Invalid=10541, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:21:37,812 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 797 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:37,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 1988 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:21:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2022-01-18 16:21:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 4621. [2022-01-18 16:21:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 2.9976190476190476) internal successors, (13849), 4620 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 13849 transitions. [2022-01-18 16:21:37,919 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 13849 transitions. Word has length 42 [2022-01-18 16:21:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:37,919 INFO L470 AbstractCegarLoop]: Abstraction has 4621 states and 13849 transitions. [2022-01-18 16:21:37,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 13849 transitions. [2022-01-18 16:21:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:37,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:37,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:37,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:38,125 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1495260898, now seen corresponding path program 20 times [2022-01-18 16:21:38,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:38,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715917457] [2022-01-18 16:21:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:38,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:38,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715917457] [2022-01-18 16:21:38,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715917457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606943390] [2022-01-18 16:21:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:21:38,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:38,395 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:21:38,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:38,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:21:38,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:38,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:38,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:39,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:39,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:21:39,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:39,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606943390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:39,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:39,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:39,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446604492] [2022-01-18 16:21:39,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:39,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:39,376 INFO L87 Difference]: Start difference. First operand 4621 states and 13849 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:42,625 INFO L93 Difference]: Finished difference Result 10783 states and 31635 transitions. [2022-01-18 16:21:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:21:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:42,641 INFO L225 Difference]: With dead ends: 10783 [2022-01-18 16:21:42,641 INFO L226 Difference]: Without dead ends: 10597 [2022-01-18 16:21:42,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=992, Invalid=7564, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:21:42,642 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 808 mSDsluCounter, 2826 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:42,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1959 Invalid, 3496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:21:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2022-01-18 16:21:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 4605. [2022-01-18 16:21:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2022-01-18 16:21:42,732 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2022-01-18 16:21:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2022-01-18 16:21:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2022-01-18 16:21:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:42,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:42,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:42,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:42,949 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,SelfDestructingSolverStorable27 [2022-01-18 16:21:42,950 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1573662208, now seen corresponding path program 21 times [2022-01-18 16:21:42,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929307334] [2022-01-18 16:21:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:42,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:43,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:43,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929307334] [2022-01-18 16:21:43,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929307334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:43,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533917700] [2022-01-18 16:21:43,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:43,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:43,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:43,228 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:43,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:21:43,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:21:43,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:21:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:43,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:43,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:43,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:21:44,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:44,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:44,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533917700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:44,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:44,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:21:44,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331138048] [2022-01-18 16:21:44,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:44,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:21:44,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:21:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:21:44,143 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:46,305 INFO L93 Difference]: Finished difference Result 9226 states and 27189 transitions. [2022-01-18 16:21:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:21:46,305 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:46,320 INFO L225 Difference]: With dead ends: 9226 [2022-01-18 16:21:46,320 INFO L226 Difference]: Without dead ends: 9005 [2022-01-18 16:21:46,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=587, Invalid=5733, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:21:46,321 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 534 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:46,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 1595 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:21:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2022-01-18 16:21:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 4605. [2022-01-18 16:21:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2022-01-18 16:21:46,408 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2022-01-18 16:21:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:46,408 INFO L470 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2022-01-18 16:21:46,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2022-01-18 16:21:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:46,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:46,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:46,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:46,614 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,SelfDestructingSolverStorable28 [2022-01-18 16:21:46,614 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1958563246, now seen corresponding path program 22 times [2022-01-18 16:21:46,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:46,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761128809] [2022-01-18 16:21:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:46,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:46,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761128809] [2022-01-18 16:21:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761128809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713367657] [2022-01-18 16:21:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:46,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:46,854 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:46,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:21:46,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:47,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:47,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:47,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:47,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:47,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:47,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:47,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713367657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:47,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:47,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:21:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406476522] [2022-01-18 16:21:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:47,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:21:47,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:21:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:21:47,780 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:48,866 INFO L93 Difference]: Finished difference Result 6147 states and 18186 transitions. [2022-01-18 16:21:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:21:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:48,875 INFO L225 Difference]: With dead ends: 6147 [2022-01-18 16:21:48,875 INFO L226 Difference]: Without dead ends: 5926 [2022-01-18 16:21:48,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:21:48,876 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 299 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:48,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 1549 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:21:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2022-01-18 16:21:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4611. [2022-01-18 16:21:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 2.996095444685466) internal successors, (13812), 4610 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 13812 transitions. [2022-01-18 16:21:48,935 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 13812 transitions. Word has length 42 [2022-01-18 16:21:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:48,935 INFO L470 AbstractCegarLoop]: Abstraction has 4611 states and 13812 transitions. [2022-01-18 16:21:48,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 13812 transitions. [2022-01-18 16:21:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:48,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:48,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:48,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 16:21:49,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:49,141 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:49,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2002158296, now seen corresponding path program 23 times [2022-01-18 16:21:49,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:49,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698749469] [2022-01-18 16:21:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:49,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:49,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698749469] [2022-01-18 16:21:49,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698749469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819551564] [2022-01-18 16:21:49,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:49,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:49,416 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:49,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:21:49,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:49,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:49,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:49,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:49,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:49,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:50,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:50,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 16:21:50,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:50,477 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 33 treesize of output 31 [2022-01-18 16:21:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819551564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:50,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:50,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-01-18 16:21:50,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126132579] [2022-01-18 16:21:50,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:50,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:50,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:50,542 INFO L87 Difference]: Start difference. First operand 4611 states and 13812 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:52,858 INFO L93 Difference]: Finished difference Result 9195 states and 27129 transitions. [2022-01-18 16:21:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:21:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:52,872 INFO L225 Difference]: With dead ends: 9195 [2022-01-18 16:21:52,872 INFO L226 Difference]: Without dead ends: 8974 [2022-01-18 16:21:52,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=534, Invalid=5628, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:21:52,873 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 520 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 3524 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 3586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:52,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 2225 Invalid, 3586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3524 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:21:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2022-01-18 16:21:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 4623. [2022-01-18 16:21:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.998052790999567) internal successors, (13857), 4622 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 13857 transitions. [2022-01-18 16:21:52,955 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 13857 transitions. Word has length 42 [2022-01-18 16:21:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:52,955 INFO L470 AbstractCegarLoop]: Abstraction has 4623 states and 13857 transitions. [2022-01-18 16:21:52,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 13857 transitions. [2022-01-18 16:21:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:52,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:52,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:52,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:53,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:53,162 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1586228036, now seen corresponding path program 24 times [2022-01-18 16:21:53,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:53,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436080018] [2022-01-18 16:21:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:53,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:53,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436080018] [2022-01-18 16:21:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436080018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348837817] [2022-01-18 16:21:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:53,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:53,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:53,392 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:21:53,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:21:53,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:53,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:21:53,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:54,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:54,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:54,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:54,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:54,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348837817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:54,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:54,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:21:54,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194459972] [2022-01-18 16:21:54,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:54,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:21:54,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:21:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:21:54,344 INFO L87 Difference]: Start difference. First operand 4623 states and 13857 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:56,628 INFO L93 Difference]: Finished difference Result 9583 states and 28408 transitions. [2022-01-18 16:21:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:21:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:21:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:56,644 INFO L225 Difference]: With dead ends: 9583 [2022-01-18 16:21:56,645 INFO L226 Difference]: Without dead ends: 9362 [2022-01-18 16:21:56,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=616, Invalid=5546, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:21:56,646 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 481 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:56,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1986 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:21:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2022-01-18 16:21:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 4627. [2022-01-18 16:21:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.9978383052313013) internal successors, (13868), 4626 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13868 transitions. [2022-01-18 16:21:56,750 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13868 transitions. Word has length 42 [2022-01-18 16:21:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 13868 transitions. [2022-01-18 16:21:56,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13868 transitions. [2022-01-18 16:21:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:21:56,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:56,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:56,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 16:21:56,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:56,956 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:21:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2100163832, now seen corresponding path program 25 times [2022-01-18 16:21:56,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:56,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634842129] [2022-01-18 16:21:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:56,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:57,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634842129] [2022-01-18 16:21:57,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634842129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968068891] [2022-01-18 16:21:57,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:21:57,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:57,191 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:57,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:21:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:21:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:57,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:57,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:21:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:57,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:57,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:57,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:58,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:58,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:21:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:21:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968068891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:58,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:58,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:21:58,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523347028] [2022-01-18 16:21:58,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:58,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:21:58,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:58,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:21:58,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:21:58,139 INFO L87 Difference]: Start difference. First operand 4627 states and 13868 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:00,866 INFO L93 Difference]: Finished difference Result 9940 states and 29522 transitions. [2022-01-18 16:22:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:22:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:00,881 INFO L225 Difference]: With dead ends: 9940 [2022-01-18 16:22:00,881 INFO L226 Difference]: Without dead ends: 9754 [2022-01-18 16:22:00,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=810, Invalid=6672, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:22:00,882 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 547 mSDsluCounter, 3320 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 3662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:00,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2392 Invalid, 3662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3572 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:22:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9754 states. [2022-01-18 16:22:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9754 to 4608. [2022-01-18 16:22:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 2.9956587801172128) internal successors, (13801), 4607 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13801 transitions. [2022-01-18 16:22:00,966 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13801 transitions. Word has length 42 [2022-01-18 16:22:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:00,966 INFO L470 AbstractCegarLoop]: Abstraction has 4608 states and 13801 transitions. [2022-01-18 16:22:00,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13801 transitions. [2022-01-18 16:22:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:00,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:00,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:00,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:01,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:01,172 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1519369394, now seen corresponding path program 26 times [2022-01-18 16:22:01,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088943426] [2022-01-18 16:22:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:01,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:01,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088943426] [2022-01-18 16:22:01,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088943426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62676066] [2022-01-18 16:22:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:01,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:01,420 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:22:01,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:01,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:01,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:02,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:02,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:02,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:02,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:02,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62676066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:02,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:02,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:02,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128859851] [2022-01-18 16:22:02,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:02,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:02,336 INFO L87 Difference]: Start difference. First operand 4608 states and 13801 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:03,469 INFO L93 Difference]: Finished difference Result 7722 states and 23004 transitions. [2022-01-18 16:22:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:03,482 INFO L225 Difference]: With dead ends: 7722 [2022-01-18 16:22:03,483 INFO L226 Difference]: Without dead ends: 7501 [2022-01-18 16:22:03,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=2843, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:22:03,483 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 311 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:03,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1310 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:22:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2022-01-18 16:22:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 4628. [2022-01-18 16:22:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.99459693105684) internal successors, (13856), 4627 states have internal predecessors, (13856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13856 transitions. [2022-01-18 16:22:03,563 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13856 transitions. Word has length 42 [2022-01-18 16:22:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:03,563 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 13856 transitions. [2022-01-18 16:22:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13856 transitions. [2022-01-18 16:22:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:03,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:03,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:03,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 16:22:03,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-18 16:22:03,784 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2127944822, now seen corresponding path program 27 times [2022-01-18 16:22:03,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:03,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794169647] [2022-01-18 16:22:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:03,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:04,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794169647] [2022-01-18 16:22:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794169647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858000455] [2022-01-18 16:22:04,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:04,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:04,032 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:22:04,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:22:04,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:04,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:22:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:04,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:04,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:04,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:04,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:04,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:05,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:05,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:05,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858000455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:05,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:05,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850960311] [2022-01-18 16:22:05,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:05,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:05,111 INFO L87 Difference]: Start difference. First operand 4628 states and 13856 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:06,419 INFO L93 Difference]: Finished difference Result 7652 states and 22818 transitions. [2022-01-18 16:22:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:22:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:06,434 INFO L225 Difference]: With dead ends: 7652 [2022-01-18 16:22:06,434 INFO L226 Difference]: Without dead ends: 7466 [2022-01-18 16:22:06,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=456, Invalid=3450, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:22:06,435 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 374 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:06,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1339 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:22:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7466 states. [2022-01-18 16:22:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7466 to 4624. [2022-01-18 16:22:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 2.9948085658663204) internal successors, (13845), 4623 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13845 transitions. [2022-01-18 16:22:06,514 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13845 transitions. Word has length 42 [2022-01-18 16:22:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:06,514 INFO L470 AbstractCegarLoop]: Abstraction has 4624 states and 13845 transitions. [2022-01-18 16:22:06,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13845 transitions. [2022-01-18 16:22:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:06,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:06,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:06,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:06,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:06,723 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -686865292, now seen corresponding path program 28 times [2022-01-18 16:22:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:06,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250913506] [2022-01-18 16:22:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:06,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:06,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250913506] [2022-01-18 16:22:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250913506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676552018] [2022-01-18 16:22:06,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:06,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:06,961 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:06,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:22:06,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:06,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:07,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:07,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:07,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:07,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:07,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:07,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:07,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676552018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:07,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:07,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:07,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896665031] [2022-01-18 16:22:07,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:07,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:07,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:07,914 INFO L87 Difference]: Start difference. First operand 4624 states and 13845 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:09,087 INFO L93 Difference]: Finished difference Result 7670 states and 22883 transitions. [2022-01-18 16:22:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:09,099 INFO L225 Difference]: With dead ends: 7670 [2022-01-18 16:22:09,100 INFO L226 Difference]: Without dead ends: 7484 [2022-01-18 16:22:09,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:22:09,100 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 318 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:09,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1340 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:22:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-01-18 16:22:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 4636. [2022-01-18 16:22:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2022-01-18 16:22:09,182 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2022-01-18 16:22:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:09,182 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2022-01-18 16:22:09,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2022-01-18 16:22:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:09,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:09,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:09,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 16:22:09,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:09,411 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1151939096, now seen corresponding path program 29 times [2022-01-18 16:22:09,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:09,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863950524] [2022-01-18 16:22:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:09,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:09,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:09,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863950524] [2022-01-18 16:22:09,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863950524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:09,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290161610] [2022-01-18 16:22:09,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:09,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:09,680 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:09,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:22:09,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:09,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:10,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:10,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:10,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:10,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 16:22:10,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:10,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:22:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290161610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:10,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:10,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-01-18 16:22:10,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016982470] [2022-01-18 16:22:10,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:10,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:10,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:10,888 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:12,459 INFO L93 Difference]: Finished difference Result 7811 states and 23124 transitions. [2022-01-18 16:22:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:22:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:12,474 INFO L225 Difference]: With dead ends: 7811 [2022-01-18 16:22:12,474 INFO L226 Difference]: Without dead ends: 7590 [2022-01-18 16:22:12,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=4140, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:22:12,475 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 493 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:12,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1700 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7590 states. [2022-01-18 16:22:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7590 to 4648. [2022-01-18 16:22:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 2.9952657628577577) internal successors, (13919), 4647 states have internal predecessors, (13919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 13919 transitions. [2022-01-18 16:22:12,551 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 13919 transitions. Word has length 42 [2022-01-18 16:22:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:12,552 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 13919 transitions. [2022-01-18 16:22:12,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 13919 transitions. [2022-01-18 16:22:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:12,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:12,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:12,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:12,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 16:22:12,758 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 445358132, now seen corresponding path program 30 times [2022-01-18 16:22:12,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:12,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302926512] [2022-01-18 16:22:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:12,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:13,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302926512] [2022-01-18 16:22:13,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302926512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547909297] [2022-01-18 16:22:13,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:13,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:13,044 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:13,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:22:13,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:22:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:13,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:13,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:13,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:13,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:13,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:13,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:13,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:14,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547909297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:14,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:14,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280028566] [2022-01-18 16:22:14,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:14,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:14,002 INFO L87 Difference]: Start difference. First operand 4648 states and 13919 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:15,800 INFO L93 Difference]: Finished difference Result 8446 states and 24941 transitions. [2022-01-18 16:22:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:22:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:15,815 INFO L225 Difference]: With dead ends: 8446 [2022-01-18 16:22:15,816 INFO L226 Difference]: Without dead ends: 8225 [2022-01-18 16:22:15,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=519, Invalid=4593, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:22:15,816 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 492 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:15,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1466 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-01-18 16:22:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 4652. [2022-01-18 16:22:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9950548269189423) internal successors, (13930), 4651 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13930 transitions. [2022-01-18 16:22:15,902 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13930 transitions. Word has length 42 [2022-01-18 16:22:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:15,902 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 13930 transitions. [2022-01-18 16:22:15,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13930 transitions. [2022-01-18 16:22:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:15,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:15,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:15,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:16,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 16:22:16,108 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1053933560, now seen corresponding path program 31 times [2022-01-18 16:22:16,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461538374] [2022-01-18 16:22:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:16,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:16,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461538374] [2022-01-18 16:22:16,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461538374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715764657] [2022-01-18 16:22:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:16,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:16,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:16,359 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:16,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:22:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:16,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:16,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:16,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:17,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:17,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:17,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:17,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:17,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715764657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:17,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:17,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:17,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307523559] [2022-01-18 16:22:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:17,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:17,300 INFO L87 Difference]: Start difference. First operand 4652 states and 13930 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:19,369 INFO L93 Difference]: Finished difference Result 8711 states and 25831 transitions. [2022-01-18 16:22:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:22:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:19,387 INFO L225 Difference]: With dead ends: 8711 [2022-01-18 16:22:19,387 INFO L226 Difference]: Without dead ends: 8525 [2022-01-18 16:22:19,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=697, Invalid=5783, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:22:19,389 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 590 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:19,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 1631 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2022-01-18 16:22:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 4636. [2022-01-18 16:22:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2022-01-18 16:22:19,504 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2022-01-18 16:22:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:19,505 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2022-01-18 16:22:19,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2022-01-18 16:22:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:19,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:19,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:19,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:19,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 16:22:19,727 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -303350114, now seen corresponding path program 32 times [2022-01-18 16:22:19,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:19,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141873305] [2022-01-18 16:22:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:19,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:19,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141873305] [2022-01-18 16:22:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141873305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154118375] [2022-01-18 16:22:19,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:19,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:19,960 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:19,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:22:19,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:22:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:20,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:20,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:20,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:20,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:20,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:20,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:20,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:20,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154118375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:20,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:20,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:20,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122477941] [2022-01-18 16:22:20,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:20,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:20,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:20,917 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:22,091 INFO L93 Difference]: Finished difference Result 6175 states and 18259 transitions. [2022-01-18 16:22:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:22,100 INFO L225 Difference]: With dead ends: 6175 [2022-01-18 16:22:22,100 INFO L226 Difference]: Without dead ends: 5954 [2022-01-18 16:22:22,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:22:22,101 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 294 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:22,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1625 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2022-01-18 16:22:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4642. [2022-01-18 16:22:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.993535875888817) internal successors, (13893), 4641 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13893 transitions. [2022-01-18 16:22:22,162 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13893 transitions. Word has length 42 [2022-01-18 16:22:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:22,162 INFO L470 AbstractCegarLoop]: Abstraction has 4642 states and 13893 transitions. [2022-01-18 16:22:22,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13893 transitions. [2022-01-18 16:22:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:22,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:22,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:22,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 16:22:22,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 16:22:22,368 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash -346945164, now seen corresponding path program 33 times [2022-01-18 16:22:22,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:22,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803540913] [2022-01-18 16:22:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:22,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:22,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803540913] [2022-01-18 16:22:22,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803540913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909365741] [2022-01-18 16:22:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:22,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:22,620 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:22,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 16:22:22,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:22:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:22,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:22,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:23,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:23,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:23,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:23,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:23,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:23,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909365741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:23,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:23,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:23,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704100931] [2022-01-18 16:22:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:23,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:23,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:23,509 INFO L87 Difference]: Start difference. First operand 4642 states and 13893 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:25,323 INFO L93 Difference]: Finished difference Result 9227 states and 27213 transitions. [2022-01-18 16:22:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:22:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:25,337 INFO L225 Difference]: With dead ends: 9227 [2022-01-18 16:22:25,338 INFO L226 Difference]: Without dead ends: 9006 [2022-01-18 16:22:25,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:22:25,338 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 403 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:25,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1637 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:22:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9006 states. [2022-01-18 16:22:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9006 to 4654. [2022-01-18 16:22:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4653 states have (on average 2.995486782720825) internal successors, (13938), 4653 states have internal predecessors, (13938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 13938 transitions. [2022-01-18 16:22:25,418 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 13938 transitions. Word has length 42 [2022-01-18 16:22:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:25,418 INFO L470 AbstractCegarLoop]: Abstraction has 4654 states and 13938 transitions. [2022-01-18 16:22:25,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 13938 transitions. [2022-01-18 16:22:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:25,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:25,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:25,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:25,623 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1053526128, now seen corresponding path program 34 times [2022-01-18 16:22:25,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:25,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475502374] [2022-01-18 16:22:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:25,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:25,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475502374] [2022-01-18 16:22:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475502374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858798162] [2022-01-18 16:22:25,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:25,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:25,880 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:25,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 16:22:25,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:26,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:26,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:26,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:26,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:26,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:26,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:26,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858798162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:26,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:26,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:26,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206022681] [2022-01-18 16:22:26,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:26,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:26,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:26,815 INFO L87 Difference]: Start difference. First operand 4654 states and 13938 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:29,028 INFO L93 Difference]: Finished difference Result 9611 states and 28481 transitions. [2022-01-18 16:22:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:22:29,028 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:29,044 INFO L225 Difference]: With dead ends: 9611 [2022-01-18 16:22:29,044 INFO L226 Difference]: Without dead ends: 9390 [2022-01-18 16:22:29,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=619, Invalid=5543, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:22:29,045 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 490 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:29,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 1751 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:22:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2022-01-18 16:22:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 4658. [2022-01-18 16:22:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.9952759287094697) internal successors, (13949), 4657 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 13949 transitions. [2022-01-18 16:22:29,134 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 13949 transitions. Word has length 42 [2022-01-18 16:22:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 4658 states and 13949 transitions. [2022-01-18 16:22:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 13949 transitions. [2022-01-18 16:22:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:29,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:29,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:29,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 16:22:29,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 16:22:29,341 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -444950700, now seen corresponding path program 35 times [2022-01-18 16:22:29,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:29,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626599789] [2022-01-18 16:22:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:29,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:29,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:29,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626599789] [2022-01-18 16:22:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626599789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:29,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803740433] [2022-01-18 16:22:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:29,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:29,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:29,632 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:29,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 16:22:29,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:29,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:29,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:30,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:30,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 16:22:30,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:30,688 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 33 treesize of output 31 [2022-01-18 16:22:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:30,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803740433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:30,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:30,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-01-18 16:22:30,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322256654] [2022-01-18 16:22:30,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:30,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:30,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:30,749 INFO L87 Difference]: Start difference. First operand 4658 states and 13949 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:33,943 INFO L93 Difference]: Finished difference Result 10474 states and 31070 transitions. [2022-01-18 16:22:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:22:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:33,959 INFO L225 Difference]: With dead ends: 10474 [2022-01-18 16:22:33,959 INFO L226 Difference]: Without dead ends: 10186 [2022-01-18 16:22:33,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=943, Invalid=8369, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:22:33,960 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 726 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 3422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:33,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1914 Invalid, 3422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:22:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2022-01-18 16:22:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 4639. [2022-01-18 16:22:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.993100474342389) internal successors, (13882), 4638 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13882 transitions. [2022-01-18 16:22:34,047 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13882 transitions. Word has length 42 [2022-01-18 16:22:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:34,047 INFO L470 AbstractCegarLoop]: Abstraction has 4639 states and 13882 transitions. [2022-01-18 16:22:34,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13882 transitions. [2022-01-18 16:22:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:34,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:34,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:34,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:34,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 16:22:34,253 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1120384770, now seen corresponding path program 36 times [2022-01-18 16:22:34,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141064171] [2022-01-18 16:22:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:34,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:34,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141064171] [2022-01-18 16:22:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141064171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883637500] [2022-01-18 16:22:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:34,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:34,498 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:34,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 16:22:34,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:22:34,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:34,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:34,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:34,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:35,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:35,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:35,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:35,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883637500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:35,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:35,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:35,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002177514] [2022-01-18 16:22:35,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:35,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:35,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:35,438 INFO L87 Difference]: Start difference. First operand 4639 states and 13882 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:36,546 INFO L93 Difference]: Finished difference Result 7750 states and 23077 transitions. [2022-01-18 16:22:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:36,558 INFO L225 Difference]: With dead ends: 7750 [2022-01-18 16:22:36,559 INFO L226 Difference]: Without dead ends: 7529 [2022-01-18 16:22:36,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=2843, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:22:36,559 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 308 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:36,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1266 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:22:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7529 states. [2022-01-18 16:22:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7529 to 4659. [2022-01-18 16:22:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.9920566766852725) internal successors, (13937), 4658 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 13937 transitions. [2022-01-18 16:22:36,631 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 13937 transitions. Word has length 42 [2022-01-18 16:22:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:36,631 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 13937 transitions. [2022-01-18 16:22:36,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 13937 transitions. [2022-01-18 16:22:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:36,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:36,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:36,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:36,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 16:22:36,837 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -511809342, now seen corresponding path program 37 times [2022-01-18 16:22:36,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26894717] [2022-01-18 16:22:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:36,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:37,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26894717] [2022-01-18 16:22:37,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26894717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868010318] [2022-01-18 16:22:37,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:37,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:37,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:37,089 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 16:22:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:37,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:37,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:37,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:37,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:37,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:37,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:37,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:38,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868010318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:38,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:38,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:38,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297795325] [2022-01-18 16:22:38,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:38,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:38,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:38,009 INFO L87 Difference]: Start difference. First operand 4659 states and 13937 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:39,275 INFO L93 Difference]: Finished difference Result 7680 states and 22891 transitions. [2022-01-18 16:22:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:22:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:39,287 INFO L225 Difference]: With dead ends: 7680 [2022-01-18 16:22:39,287 INFO L226 Difference]: Without dead ends: 7494 [2022-01-18 16:22:39,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=456, Invalid=3450, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:22:39,288 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 386 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:39,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 1167 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:22:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7494 states. [2022-01-18 16:22:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7494 to 4655. [2022-01-18 16:22:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.9922647185217017) internal successors, (13926), 4654 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13926 transitions. [2022-01-18 16:22:39,359 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13926 transitions. Word has length 42 [2022-01-18 16:22:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:39,359 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 13926 transitions. [2022-01-18 16:22:39,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13926 transitions. [2022-01-18 16:22:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:39,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:39,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:39,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:39,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:39,565 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash 968347840, now seen corresponding path program 38 times [2022-01-18 16:22:39,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512487509] [2022-01-18 16:22:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:39,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:39,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512487509] [2022-01-18 16:22:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512487509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310257729] [2022-01-18 16:22:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:39,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:39,798 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:39,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 16:22:39,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:22:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:39,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:40,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:40,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:40,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:40,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:40,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:40,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:40,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310257729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:40,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:40,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986929191] [2022-01-18 16:22:40,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:40,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:40,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:40,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:40,736 INFO L87 Difference]: Start difference. First operand 4655 states and 13926 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:42,028 INFO L93 Difference]: Finished difference Result 7698 states and 22956 transitions. [2022-01-18 16:22:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:42,040 INFO L225 Difference]: With dead ends: 7698 [2022-01-18 16:22:42,040 INFO L226 Difference]: Without dead ends: 7512 [2022-01-18 16:22:42,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:22:42,041 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 276 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:42,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1596 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:22:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2022-01-18 16:22:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 4651. [2022-01-18 16:22:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.99247311827957) internal successors, (13915), 4650 states have internal predecessors, (13915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13915 transitions. [2022-01-18 16:22:42,110 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13915 transitions. Word has length 42 [2022-01-18 16:22:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:42,111 INFO L470 AbstractCegarLoop]: Abstraction has 4651 states and 13915 transitions. [2022-01-18 16:22:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13915 transitions. [2022-01-18 16:22:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:42,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:42,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:42,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:42,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:42,316 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1487815068, now seen corresponding path program 39 times [2022-01-18 16:22:42,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768655409] [2022-01-18 16:22:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:42,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:42,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768655409] [2022-01-18 16:22:42,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768655409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862125791] [2022-01-18 16:22:42,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:42,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:42,584 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:42,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 16:22:42,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:22:42,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:42,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:42,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:42,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:42,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:43,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:43,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:43,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:43,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:43,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862125791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:43,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:43,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:43,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972506201] [2022-01-18 16:22:43,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:43,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:43,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:43,549 INFO L87 Difference]: Start difference. First operand 4651 states and 13915 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:44,953 INFO L93 Difference]: Finished difference Result 7839 states and 23197 transitions. [2022-01-18 16:22:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:22:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:44,965 INFO L225 Difference]: With dead ends: 7839 [2022-01-18 16:22:44,965 INFO L226 Difference]: Without dead ends: 7618 [2022-01-18 16:22:44,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=3307, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:22:44,966 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 363 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:44,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 1650 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7618 states. [2022-01-18 16:22:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7618 to 4663. [2022-01-18 16:22:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.9944229944229943) internal successors, (13960), 4662 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13960 transitions. [2022-01-18 16:22:45,039 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13960 transitions. Word has length 42 [2022-01-18 16:22:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:45,039 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 13960 transitions. [2022-01-18 16:22:45,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13960 transitions. [2022-01-18 16:22:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:45,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:45,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:45,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 16:22:45,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 16:22:45,245 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2100571264, now seen corresponding path program 40 times [2022-01-18 16:22:45,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:45,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270240822] [2022-01-18 16:22:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:45,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:45,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270240822] [2022-01-18 16:22:45,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270240822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381232669] [2022-01-18 16:22:45,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:45,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:45,500 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:45,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 16:22:45,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:45,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:45,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:46,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:46,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:46,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:46,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:46,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381232669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:46,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:46,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:46,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037008473] [2022-01-18 16:22:46,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:46,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:46,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:46,404 INFO L87 Difference]: Start difference. First operand 4663 states and 13960 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:48,061 INFO L93 Difference]: Finished difference Result 8474 states and 25014 transitions. [2022-01-18 16:22:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:22:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:48,074 INFO L225 Difference]: With dead ends: 8474 [2022-01-18 16:22:48,074 INFO L226 Difference]: Without dead ends: 8253 [2022-01-18 16:22:48,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=519, Invalid=4593, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:22:48,075 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 521 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:48,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1232 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:22:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8253 states. [2022-01-18 16:22:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8253 to 4667. [2022-01-18 16:22:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.994213459065581) internal successors, (13971), 4666 states have internal predecessors, (13971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 13971 transitions. [2022-01-18 16:22:48,149 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 13971 transitions. Word has length 42 [2022-01-18 16:22:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:48,149 INFO L470 AbstractCegarLoop]: Abstraction has 4667 states and 13971 transitions. [2022-01-18 16:22:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 13971 transitions. [2022-01-18 16:22:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:48,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:48,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:48,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 16:22:48,355 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1585820604, now seen corresponding path program 41 times [2022-01-18 16:22:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:48,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944612428] [2022-01-18 16:22:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:48,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:48,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944612428] [2022-01-18 16:22:48,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944612428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565372423] [2022-01-18 16:22:48,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:48,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:48,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:48,622 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:48,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 16:22:48,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:48,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:49,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:49,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:49,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:49,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:49,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:49,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565372423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:49,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:49,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:22:49,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171722345] [2022-01-18 16:22:49,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:49,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:22:49,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:22:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:22:49,582 INFO L87 Difference]: Start difference. First operand 4667 states and 13971 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:51,664 INFO L93 Difference]: Finished difference Result 8739 states and 25904 transitions. [2022-01-18 16:22:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:22:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:51,678 INFO L225 Difference]: With dead ends: 8739 [2022-01-18 16:22:51,678 INFO L226 Difference]: Without dead ends: 8553 [2022-01-18 16:22:51,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=697, Invalid=5783, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:22:51,679 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 588 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:51,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1583 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:22:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2022-01-18 16:22:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 4636. [2022-01-18 16:22:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2022-01-18 16:22:51,755 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2022-01-18 16:22:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:51,755 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2022-01-18 16:22:51,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2022-01-18 16:22:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:51,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:51,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:51,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:51,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 16:22:51,961 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 411792262, now seen corresponding path program 42 times [2022-01-18 16:22:51,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:51,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890307101] [2022-01-18 16:22:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:51,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:52,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890307101] [2022-01-18 16:22:52,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890307101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679417043] [2022-01-18 16:22:52,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:52,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:52,228 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:52,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 16:22:52,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:22:52,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:22:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:52,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:52,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:52,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:52,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:53,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:53,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:53,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679417043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:53,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:53,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:22:53,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948676591] [2022-01-18 16:22:53,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:53,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:22:53,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:22:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:22:53,124 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:54,596 INFO L93 Difference]: Finished difference Result 6862 states and 20234 transitions. [2022-01-18 16:22:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:22:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:54,607 INFO L225 Difference]: With dead ends: 6862 [2022-01-18 16:22:54,607 INFO L226 Difference]: Without dead ends: 6641 [2022-01-18 16:22:54,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=441, Invalid=3591, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:22:54,607 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 336 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:54,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1449 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:22:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2022-01-18 16:22:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4639. [2022-01-18 16:22:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.99374730487279) internal successors, (13885), 4638 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13885 transitions. [2022-01-18 16:22:54,670 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13885 transitions. Word has length 42 [2022-01-18 16:22:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:54,670 INFO L470 AbstractCegarLoop]: Abstraction has 4639 states and 13885 transitions. [2022-01-18 16:22:54,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13885 transitions. [2022-01-18 16:22:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:54,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:54,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:54,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 16:22:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:54,875 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash 368197212, now seen corresponding path program 43 times [2022-01-18 16:22:54,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004670573] [2022-01-18 16:22:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:55,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004670573] [2022-01-18 16:22:55,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004670573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:55,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785554304] [2022-01-18 16:22:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:55,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:55,132 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:55,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 16:22:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:55,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:55,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:55,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:55,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:55,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:55,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:55,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:55,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:55,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785554304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:55,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:55,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:22:55,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582053581] [2022-01-18 16:22:55,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:55,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:22:55,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:22:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:22:55,991 INFO L87 Difference]: Start difference. First operand 4639 states and 13885 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:58,265 INFO L93 Difference]: Finished difference Result 10045 states and 29651 transitions. [2022-01-18 16:22:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:22:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:22:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:58,281 INFO L225 Difference]: With dead ends: 10045 [2022-01-18 16:22:58,282 INFO L226 Difference]: Without dead ends: 9824 [2022-01-18 16:22:58,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=590, Invalid=5572, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:22:58,283 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 468 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:58,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1730 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:22:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9824 states. [2022-01-18 16:22:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9824 to 4651. [2022-01-18 16:22:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9956989247311827) internal successors, (13930), 4650 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13930 transitions. [2022-01-18 16:22:58,367 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13930 transitions. Word has length 42 [2022-01-18 16:22:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:58,367 INFO L470 AbstractCegarLoop]: Abstraction has 4651 states and 13930 transitions. [2022-01-18 16:22:58,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13930 transitions. [2022-01-18 16:22:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:22:58,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:58,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:58,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 16:22:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:58,573 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:22:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash -338383752, now seen corresponding path program 44 times [2022-01-18 16:22:58,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113593474] [2022-01-18 16:22:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:58,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:58,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113593474] [2022-01-18 16:22:58,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113593474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930376983] [2022-01-18 16:22:58,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:58,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:58,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:58,844 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:58,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 16:22:58,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:58,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:22:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:59,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:22:59,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:22:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:59,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:59,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:59,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:22:59,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:59,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:22:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930376983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:59,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:59,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:22:59,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000312886] [2022-01-18 16:22:59,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:22:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:22:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:22:59,776 INFO L87 Difference]: Start difference. First operand 4651 states and 13930 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:02,364 INFO L93 Difference]: Finished difference Result 10389 states and 30800 transitions. [2022-01-18 16:23:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:23:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:02,381 INFO L225 Difference]: With dead ends: 10389 [2022-01-18 16:23:02,381 INFO L226 Difference]: Without dead ends: 10168 [2022-01-18 16:23:02,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:23:02,382 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 569 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:02,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 1548 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:23:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2022-01-18 16:23:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 4655. [2022-01-18 16:23:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.995487752470993) internal successors, (13941), 4654 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13941 transitions. [2022-01-18 16:23:02,496 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13941 transitions. Word has length 42 [2022-01-18 16:23:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:02,496 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 13941 transitions. [2022-01-18 16:23:02,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13941 transitions. [2022-01-18 16:23:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:02,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:02,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:02,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:02,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:02,703 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 270191676, now seen corresponding path program 45 times [2022-01-18 16:23:02,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452448286] [2022-01-18 16:23:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:02,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:02,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:02,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452448286] [2022-01-18 16:23:02,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452448286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:02,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084353152] [2022-01-18 16:23:02,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:02,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:02,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:02,937 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:02,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 16:23:02,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:23:02,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:02,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:03,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:03,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:03,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:03,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:23:03,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:03,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:03,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084353152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:03,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:03,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:23:03,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934781996] [2022-01-18 16:23:03,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:03,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:03,819 INFO L87 Difference]: Start difference. First operand 4655 states and 13941 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:06,615 INFO L93 Difference]: Finished difference Result 10077 states and 29771 transitions. [2022-01-18 16:23:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:23:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:06,631 INFO L225 Difference]: With dead ends: 10077 [2022-01-18 16:23:06,631 INFO L226 Difference]: Without dead ends: 9891 [2022-01-18 16:23:06,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=882, Invalid=7128, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:23:06,632 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 682 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:06,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1651 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:23:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9891 states. [2022-01-18 16:23:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9891 to 4636. [2022-01-18 16:23:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2022-01-18 16:23:06,721 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2022-01-18 16:23:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:06,721 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2022-01-18 16:23:06,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2022-01-18 16:23:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:06,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:06,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:06,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:06,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 16:23:06,927 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1979043580, now seen corresponding path program 46 times [2022-01-18 16:23:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:06,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539862425] [2022-01-18 16:23:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:06,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:07,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539862425] [2022-01-18 16:23:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539862425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132519640] [2022-01-18 16:23:07,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:07,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:07,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:07,156 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:07,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 16:23:07,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:07,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:07,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:07,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:07,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:07,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:07,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:23:07,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:07,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:08,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132519640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:08,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:08,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:23:08,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037284922] [2022-01-18 16:23:08,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:08,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:23:08,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:23:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:23:08,019 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:09,095 INFO L93 Difference]: Finished difference Result 6125 states and 18109 transitions. [2022-01-18 16:23:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:23:09,095 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:09,104 INFO L225 Difference]: With dead ends: 6125 [2022-01-18 16:23:09,104 INFO L226 Difference]: Without dead ends: 5904 [2022-01-18 16:23:09,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=2574, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:23:09,105 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 307 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:09,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1302 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:23:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2022-01-18 16:23:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 4636. [2022-01-18 16:23:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2022-01-18 16:23:09,161 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2022-01-18 16:23:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:09,161 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2022-01-18 16:23:09,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2022-01-18 16:23:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:09,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:09,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:09,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:09,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 16:23:09,366 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -754592520, now seen corresponding path program 47 times [2022-01-18 16:23:09,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:09,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42522735] [2022-01-18 16:23:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:09,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:09,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42522735] [2022-01-18 16:23:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42522735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806864530] [2022-01-18 16:23:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:09,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:09,599 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:09,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 16:23:09,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:23:09,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:09,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:09,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:10,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:10,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:10,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:10,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:10,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806864530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:10,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 16:23:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195290444] [2022-01-18 16:23:10,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:23:10,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:23:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:23:10,414 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:11,425 INFO L93 Difference]: Finished difference Result 6650 states and 19403 transitions. [2022-01-18 16:23:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:23:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:11,435 INFO L225 Difference]: With dead ends: 6650 [2022-01-18 16:23:11,435 INFO L226 Difference]: Without dead ends: 6429 [2022-01-18 16:23:11,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=2572, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:23:11,435 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 390 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:11,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1297 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:23:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2022-01-18 16:23:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 4629. [2022-01-18 16:23:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.993733794295592) internal successors, (13855), 4628 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13855 transitions. [2022-01-18 16:23:11,516 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13855 transitions. Word has length 42 [2022-01-18 16:23:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:11,516 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 13855 transitions. [2022-01-18 16:23:11,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13855 transitions. [2022-01-18 16:23:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:11,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:11,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:11,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:11,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:11,722 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash 408986468, now seen corresponding path program 48 times [2022-01-18 16:23:11,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:11,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493338136] [2022-01-18 16:23:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:11,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:11,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493338136] [2022-01-18 16:23:11,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493338136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631703190] [2022-01-18 16:23:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:11,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:11,953 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:11,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 16:23:11,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:23:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:12,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:12,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:12,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:12,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:12,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:12,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:12,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631703190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:12,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:12,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:23:12,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112133679] [2022-01-18 16:23:12,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:12,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:12,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:12,832 INFO L87 Difference]: Start difference. First operand 4629 states and 13855 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:15,428 INFO L93 Difference]: Finished difference Result 10472 states and 30961 transitions. [2022-01-18 16:23:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:23:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:15,446 INFO L225 Difference]: With dead ends: 10472 [2022-01-18 16:23:15,446 INFO L226 Difference]: Without dead ends: 10251 [2022-01-18 16:23:15,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=714, Invalid=6258, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:23:15,447 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 517 mSDsluCounter, 3267 mSDsCounter, 0 mSdLazyCounter, 3553 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:15,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 2161 Invalid, 3612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3553 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:23:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-01-18 16:23:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 4649. [2022-01-18 16:23:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.996987951807229) internal successors, (13930), 4648 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13930 transitions. [2022-01-18 16:23:15,545 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13930 transitions. Word has length 42 [2022-01-18 16:23:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 13930 transitions. [2022-01-18 16:23:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13930 transitions. [2022-01-18 16:23:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:15,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:15,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:15,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 16:23:15,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 16:23:15,752 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash -297594496, now seen corresponding path program 49 times [2022-01-18 16:23:15,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:15,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745720383] [2022-01-18 16:23:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:15,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:16,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745720383] [2022-01-18 16:23:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745720383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427496563] [2022-01-18 16:23:16,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:16,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:16,024 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:16,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 16:23:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:16,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:16,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:16,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:16,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:16,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:16,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:16,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:17,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427496563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:17,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:17,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:23:17,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319824112] [2022-01-18 16:23:17,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:17,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:17,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:17,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:17,027 INFO L87 Difference]: Start difference. First operand 4649 states and 13930 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:19,908 INFO L93 Difference]: Finished difference Result 11080 states and 32738 transitions. [2022-01-18 16:23:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:23:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:19,927 INFO L225 Difference]: With dead ends: 11080 [2022-01-18 16:23:19,927 INFO L226 Difference]: Without dead ends: 10859 [2022-01-18 16:23:19,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=864, Invalid=7508, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:23:19,928 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 668 mSDsluCounter, 2661 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:19,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1832 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:23:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-01-18 16:23:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 4653. [2022-01-18 16:23:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.996775580395529) internal successors, (13941), 4652 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13941 transitions. [2022-01-18 16:23:20,048 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13941 transitions. Word has length 42 [2022-01-18 16:23:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:20,048 INFO L470 AbstractCegarLoop]: Abstraction has 4653 states and 13941 transitions. [2022-01-18 16:23:20,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13941 transitions. [2022-01-18 16:23:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:20,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:20,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:20,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 16:23:20,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 16:23:20,255 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 310980932, now seen corresponding path program 50 times [2022-01-18 16:23:20,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223633827] [2022-01-18 16:23:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:20,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:20,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:20,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223633827] [2022-01-18 16:23:20,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223633827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:20,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26683115] [2022-01-18 16:23:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:20,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:20,505 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:20,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:23:20,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:20,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:20,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:20,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:21,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:21,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:21,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:21,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26683115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:21,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:21,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:23:21,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190622100] [2022-01-18 16:23:21,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:21,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:21,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:21,383 INFO L87 Difference]: Start difference. First operand 4653 states and 13941 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:24,157 INFO L93 Difference]: Finished difference Result 10212 states and 29948 transitions. [2022-01-18 16:23:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:23:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:24,175 INFO L225 Difference]: With dead ends: 10212 [2022-01-18 16:23:24,175 INFO L226 Difference]: Without dead ends: 10026 [2022-01-18 16:23:24,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=861, Invalid=6795, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:23:24,177 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 709 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:24,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 2045 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:23:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10026 states. [2022-01-18 16:23:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10026 to 4637. [2022-01-18 16:23:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.9950388265746333) internal successors, (13885), 4636 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13885 transitions. [2022-01-18 16:23:24,282 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13885 transitions. Word has length 42 [2022-01-18 16:23:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:24,282 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 13885 transitions. [2022-01-18 16:23:24,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13885 transitions. [2022-01-18 16:23:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:24,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:24,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:24,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 16:23:24,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:24,488 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -915063258, now seen corresponding path program 51 times [2022-01-18 16:23:24,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:24,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442721514] [2022-01-18 16:23:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:24,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:24,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:24,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442721514] [2022-01-18 16:23:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442721514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:24,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119500853] [2022-01-18 16:23:24,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:24,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:24,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:24,723 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:23:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:23:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:23:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:24,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:24,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:25,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:25,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:25,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:25,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:25,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:25,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119500853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:25,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:25,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:23:25,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309891565] [2022-01-18 16:23:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:25,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:25,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:25,586 INFO L87 Difference]: Start difference. First operand 4637 states and 13885 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:27,324 INFO L93 Difference]: Finished difference Result 9015 states and 26491 transitions. [2022-01-18 16:23:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:23:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:27,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:27,339 INFO L225 Difference]: With dead ends: 9015 [2022-01-18 16:23:27,339 INFO L226 Difference]: Without dead ends: 8794 [2022-01-18 16:23:27,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=473, Invalid=4497, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:23:27,340 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 504 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:27,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1599 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:23:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8794 states. [2022-01-18 16:23:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8794 to 4627. [2022-01-18 16:23:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2022-01-18 16:23:27,425 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2022-01-18 16:23:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:27,425 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2022-01-18 16:23:27,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2022-01-18 16:23:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:27,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:27,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:27,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:27,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:27,631 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 144082166, now seen corresponding path program 52 times [2022-01-18 16:23:27,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:27,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144654308] [2022-01-18 16:23:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:27,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:27,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:27,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144654308] [2022-01-18 16:23:27,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144654308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:27,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430857443] [2022-01-18 16:23:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:27,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:27,864 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:27,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:23:27,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:28,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:28,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:28,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:28,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:28,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:28,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:28,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430857443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:28,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:28,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722955280] [2022-01-18 16:23:28,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:28,815 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:30,077 INFO L93 Difference]: Finished difference Result 7849 states and 23350 transitions. [2022-01-18 16:23:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:23:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:30,089 INFO L225 Difference]: With dead ends: 7849 [2022-01-18 16:23:30,089 INFO L226 Difference]: Without dead ends: 7628 [2022-01-18 16:23:30,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=2947, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:23:30,090 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 332 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:30,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1421 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:23:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7628 states. [2022-01-18 16:23:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7628 to 4647. [2022-01-18 16:23:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4646 states have (on average 2.992251399052949) internal successors, (13902), 4646 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 13902 transitions. [2022-01-18 16:23:30,163 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 13902 transitions. Word has length 42 [2022-01-18 16:23:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 4647 states and 13902 transitions. [2022-01-18 16:23:30,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 13902 transitions. [2022-01-18 16:23:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:30,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:30,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:30,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:30,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 16:23:30,368 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash 752657594, now seen corresponding path program 53 times [2022-01-18 16:23:30,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:30,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196770529] [2022-01-18 16:23:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:30,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:30,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196770529] [2022-01-18 16:23:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196770529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521367100] [2022-01-18 16:23:30,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:30,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:30,602 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:30,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:23:30,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:30,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:30,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:30,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:31,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:31,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:31,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:31,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:31,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521367100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:31,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:31,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:31,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417605339] [2022-01-18 16:23:31,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:31,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:31,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:31,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:31,517 INFO L87 Difference]: Start difference. First operand 4647 states and 13902 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:33,119 INFO L93 Difference]: Finished difference Result 7762 states and 23115 transitions. [2022-01-18 16:23:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:23:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:33,130 INFO L225 Difference]: With dead ends: 7762 [2022-01-18 16:23:33,130 INFO L226 Difference]: Without dead ends: 7576 [2022-01-18 16:23:33,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=468, Invalid=3564, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:23:33,131 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 358 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:33,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1635 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:23:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2022-01-18 16:23:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 4643. [2022-01-18 16:23:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9924601464885825) internal successors, (13891), 4642 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13891 transitions. [2022-01-18 16:23:33,211 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13891 transitions. Word has length 42 [2022-01-18 16:23:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:33,211 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 13891 transitions. [2022-01-18 16:23:33,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13891 transitions. [2022-01-18 16:23:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:33,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:33,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:33,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:33,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:33,417 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2062152520, now seen corresponding path program 54 times [2022-01-18 16:23:33,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449951643] [2022-01-18 16:23:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:33,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:33,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449951643] [2022-01-18 16:23:33,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449951643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199069935] [2022-01-18 16:23:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:33,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:33,648 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:33,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:23:33,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:23:33,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:33,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:33,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:34,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:34,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:34,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:34,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:34,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199069935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:34,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:34,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:34,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209056398] [2022-01-18 16:23:34,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:34,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:34,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:34,531 INFO L87 Difference]: Start difference. First operand 4643 states and 13891 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:35,686 INFO L93 Difference]: Finished difference Result 7802 states and 23221 transitions. [2022-01-18 16:23:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:23:35,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:35,698 INFO L225 Difference]: With dead ends: 7802 [2022-01-18 16:23:35,698 INFO L226 Difference]: Without dead ends: 7616 [2022-01-18 16:23:35,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=3037, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:23:35,699 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 314 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:35,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1170 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:23:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2022-01-18 16:23:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 4639. [2022-01-18 16:23:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.9926692539887885) internal successors, (13880), 4638 states have internal predecessors, (13880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13880 transitions. [2022-01-18 16:23:35,793 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13880 transitions. Word has length 42 [2022-01-18 16:23:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:35,793 INFO L470 AbstractCegarLoop]: Abstraction has 4639 states and 13880 transitions. [2022-01-18 16:23:35,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13880 transitions. [2022-01-18 16:23:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:35,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:35,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:35,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 16:23:35,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 16:23:35,999 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -223348132, now seen corresponding path program 55 times [2022-01-18 16:23:36,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841582704] [2022-01-18 16:23:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:36,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:36,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841582704] [2022-01-18 16:23:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841582704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734348173] [2022-01-18 16:23:36,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:36,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:36,266 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:36,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:23:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:36,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:36,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:37,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:37,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:37,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:37,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:37,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734348173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:37,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:37,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826749948] [2022-01-18 16:23:37,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:37,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:37,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:37,172 INFO L87 Difference]: Start difference. First operand 4639 states and 13880 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:38,655 INFO L93 Difference]: Finished difference Result 7803 states and 23096 transitions. [2022-01-18 16:23:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:23:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:38,693 INFO L225 Difference]: With dead ends: 7803 [2022-01-18 16:23:38,693 INFO L226 Difference]: Without dead ends: 7582 [2022-01-18 16:23:38,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=368, Invalid=3414, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:23:38,694 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 363 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:38,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 1805 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:23:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7582 states. [2022-01-18 16:23:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7582 to 4651. [2022-01-18 16:23:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9946236559139785) internal successors, (13925), 4650 states have internal predecessors, (13925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13925 transitions. [2022-01-18 16:23:38,759 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13925 transitions. Word has length 42 [2022-01-18 16:23:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:38,759 INFO L470 AbstractCegarLoop]: Abstraction has 4651 states and 13925 transitions. [2022-01-18 16:23:38,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13925 transitions. [2022-01-18 16:23:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:38,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:38,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:38,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:38,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-18 16:23:38,966 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash -929929096, now seen corresponding path program 56 times [2022-01-18 16:23:38,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127149674] [2022-01-18 16:23:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:38,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:39,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127149674] [2022-01-18 16:23:39,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127149674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675626249] [2022-01-18 16:23:39,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:39,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:39,193 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:39,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:23:39,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:39,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:39,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:39,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:39,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:39,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:40,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:40,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675626249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:40,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:40,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:40,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397182438] [2022-01-18 16:23:40,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:40,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:40,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:40,126 INFO L87 Difference]: Start difference. First operand 4651 states and 13925 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:42,135 INFO L93 Difference]: Finished difference Result 8506 states and 25104 transitions. [2022-01-18 16:23:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:23:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:42,149 INFO L225 Difference]: With dead ends: 8506 [2022-01-18 16:23:42,149 INFO L226 Difference]: Without dead ends: 8285 [2022-01-18 16:23:42,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=537, Invalid=4719, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:23:42,149 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 483 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:42,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1822 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:23:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2022-01-18 16:23:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 4655. [2022-01-18 16:23:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.994413407821229) internal successors, (13936), 4654 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13936 transitions. [2022-01-18 16:23:42,227 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13936 transitions. Word has length 42 [2022-01-18 16:23:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 13936 transitions. [2022-01-18 16:23:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13936 transitions. [2022-01-18 16:23:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:42,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:42,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:42,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:42,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:42,434 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -321353668, now seen corresponding path program 57 times [2022-01-18 16:23:42,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:42,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084695077] [2022-01-18 16:23:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:42,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084695077] [2022-01-18 16:23:42,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084695077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214528832] [2022-01-18 16:23:42,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:42,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:42,706 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:42,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:23:42,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:23:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:42,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:43,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:43,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:43,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:43,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:43,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:43,586 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 21 treesize of output 23 [2022-01-18 16:23:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:43,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214528832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:43,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:43,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:43,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333137798] [2022-01-18 16:23:43,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:43,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:43,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:43,646 INFO L87 Difference]: Start difference. First operand 4655 states and 13936 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:46,023 INFO L93 Difference]: Finished difference Result 8869 states and 26245 transitions. [2022-01-18 16:23:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:23:46,023 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:46,037 INFO L225 Difference]: With dead ends: 8869 [2022-01-18 16:23:46,037 INFO L226 Difference]: Without dead ends: 8683 [2022-01-18 16:23:46,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=717, Invalid=5925, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:23:46,038 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 562 mSDsluCounter, 2838 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:46,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 2075 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:23:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8683 states. [2022-01-18 16:23:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8683 to 4627. [2022-01-18 16:23:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2022-01-18 16:23:46,120 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2022-01-18 16:23:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:46,120 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2022-01-18 16:23:46,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2022-01-18 16:23:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:46,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:46,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:46,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:46,326 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1170110348, now seen corresponding path program 58 times [2022-01-18 16:23:46,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442947092] [2022-01-18 16:23:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:46,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:46,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:46,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442947092] [2022-01-18 16:23:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442947092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:46,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169629191] [2022-01-18 16:23:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:46,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:46,546 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:23:46,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:46,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:46,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:46,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:46,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:47,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:47,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:47,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:47,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169629191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:47,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:47,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245729665] [2022-01-18 16:23:47,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:47,430 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:49,641 INFO L93 Difference]: Finished difference Result 8909 states and 26152 transitions. [2022-01-18 16:23:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:23:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:49,655 INFO L225 Difference]: With dead ends: 8909 [2022-01-18 16:23:49,655 INFO L226 Difference]: Without dead ends: 8688 [2022-01-18 16:23:49,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=685, Invalid=5477, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:23:49,656 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 483 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:49,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 2178 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:23:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-01-18 16:23:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 4639. [2022-01-18 16:23:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.995256576110392) internal successors, (13892), 4638 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13892 transitions. [2022-01-18 16:23:49,743 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13892 transitions. Word has length 42 [2022-01-18 16:23:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 4639 states and 13892 transitions. [2022-01-18 16:23:49,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13892 transitions. [2022-01-18 16:23:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:49,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:49,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:49,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:49,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 16:23:49,949 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:49,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1876691312, now seen corresponding path program 59 times [2022-01-18 16:23:49,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:49,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875259076] [2022-01-18 16:23:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:49,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:50,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875259076] [2022-01-18 16:23:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875259076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501776590] [2022-01-18 16:23:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:50,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:50,184 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:50,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:23:50,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:50,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:50,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:50,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:50,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:50,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:51,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:51,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:51,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501776590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:51,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:51,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:51,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615921611] [2022-01-18 16:23:51,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:51,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:51,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:51,075 INFO L87 Difference]: Start difference. First operand 4639 states and 13892 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:53,612 INFO L93 Difference]: Finished difference Result 9361 states and 27519 transitions. [2022-01-18 16:23:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 16:23:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:53,627 INFO L225 Difference]: With dead ends: 9361 [2022-01-18 16:23:53,627 INFO L226 Difference]: Without dead ends: 9140 [2022-01-18 16:23:53,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=776, Invalid=6534, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:23:53,629 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 571 mSDsluCounter, 2933 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:53,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 2068 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:23:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9140 states. [2022-01-18 16:23:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9140 to 4643. [2022-01-18 16:23:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9950452391210685) internal successors, (13903), 4642 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13903 transitions. [2022-01-18 16:23:53,728 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13903 transitions. Word has length 42 [2022-01-18 16:23:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:53,729 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 13903 transitions. [2022-01-18 16:23:53,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13903 transitions. [2022-01-18 16:23:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:53,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:53,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:53,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:53,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 16:23:53,934 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1268115884, now seen corresponding path program 60 times [2022-01-18 16:23:53,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:53,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023812208] [2022-01-18 16:23:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:54,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023812208] [2022-01-18 16:23:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023812208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:54,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681465014] [2022-01-18 16:23:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:54,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:54,157 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:54,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:23:54,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:23:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:54,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:23:54,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:54,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:54,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:54,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:54,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:54,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:55,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681465014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:55,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:55,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:55,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893599566] [2022-01-18 16:23:55,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:55,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:55,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:55,028 INFO L87 Difference]: Start difference. First operand 4643 states and 13903 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:57,844 INFO L93 Difference]: Finished difference Result 9101 states and 26621 transitions. [2022-01-18 16:23:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:23:57,845 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:23:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:57,859 INFO L225 Difference]: With dead ends: 9101 [2022-01-18 16:23:57,859 INFO L226 Difference]: Without dead ends: 8915 [2022-01-18 16:23:57,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=910, Invalid=7280, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:23:57,860 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 656 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 3521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:57,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 2240 Invalid, 3521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:23:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8915 states. [2022-01-18 16:23:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8915 to 4627. [2022-01-18 16:23:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2022-01-18 16:23:57,935 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2022-01-18 16:23:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2022-01-18 16:23:57,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2022-01-18 16:23:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:23:57,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:57,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:57,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:58,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:58,141 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:23:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1800807222, now seen corresponding path program 61 times [2022-01-18 16:23:58,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:58,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472740851] [2022-01-18 16:23:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:58,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:58,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472740851] [2022-01-18 16:23:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472740851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893790362] [2022-01-18 16:23:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:58,384 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:23:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:23:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:58,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:58,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:23:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:58,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:59,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:59,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:23:59,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:23:59,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-01-18 16:23:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:23:59,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893790362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:59,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:59,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:23:59,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952503258] [2022-01-18 16:23:59,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:59,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:59,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:59,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:59,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:59,256 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:00,655 INFO L93 Difference]: Finished difference Result 7678 states and 22580 transitions. [2022-01-18 16:24:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:24:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:00,667 INFO L225 Difference]: With dead ends: 7678 [2022-01-18 16:24:00,667 INFO L226 Difference]: Without dead ends: 7457 [2022-01-18 16:24:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=3511, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:24:00,668 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 402 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:00,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1669 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:24:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2022-01-18 16:24:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 4586. [2022-01-18 16:24:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994547437295529) internal successors, (13730), 4585 states have internal predecessors, (13730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13730 transitions. [2022-01-18 16:24:00,739 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13730 transitions. Word has length 42 [2022-01-18 16:24:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:00,740 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 13730 transitions. [2022-01-18 16:24:00,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13730 transitions. [2022-01-18 16:24:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:00,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:00,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:00,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:00,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 16:24:00,959 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash -777528102, now seen corresponding path program 62 times [2022-01-18 16:24:00,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:00,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232916440] [2022-01-18 16:24:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:00,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:01,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232916440] [2022-01-18 16:24:01,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232916440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599997799] [2022-01-18 16:24:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:01,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:01,183 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:01,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:24:01,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:01,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:01,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:24:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:01,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:01,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:01,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:01,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:01,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:01,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:01,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:02,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599997799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:02,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:02,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:02,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210247348] [2022-01-18 16:24:02,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:02,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:02,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:02,111 INFO L87 Difference]: Start difference. First operand 4586 states and 13730 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:03,282 INFO L93 Difference]: Finished difference Result 6784 states and 19928 transitions. [2022-01-18 16:24:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:24:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:03,292 INFO L225 Difference]: With dead ends: 6784 [2022-01-18 16:24:03,293 INFO L226 Difference]: Without dead ends: 6533 [2022-01-18 16:24:03,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=2675, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:24:03,293 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 349 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:03,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 1820 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:24:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2022-01-18 16:24:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 4622. [2022-01-18 16:24:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 2.9939407054750053) internal successors, (13835), 4621 states have internal predecessors, (13835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 13835 transitions. [2022-01-18 16:24:03,368 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 13835 transitions. Word has length 42 [2022-01-18 16:24:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:03,368 INFO L470 AbstractCegarLoop]: Abstraction has 4622 states and 13835 transitions. [2022-01-18 16:24:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 13835 transitions. [2022-01-18 16:24:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:03,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:03,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:03,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 16:24:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 16:24:03,575 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1035654764, now seen corresponding path program 63 times [2022-01-18 16:24:03,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:03,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943894250] [2022-01-18 16:24:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:03,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:03,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:03,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943894250] [2022-01-18 16:24:03,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943894250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:03,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447530517] [2022-01-18 16:24:03,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:03,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:03,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:03,791 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:03,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:24:03,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:24:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:24:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:04,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:04,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:04,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:04,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:04,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:04,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:04,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:04,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447530517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:04,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:04,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:04,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360205132] [2022-01-18 16:24:04,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:04,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:04,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:04,696 INFO L87 Difference]: Start difference. First operand 4622 states and 13835 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:06,071 INFO L93 Difference]: Finished difference Result 7163 states and 20862 transitions. [2022-01-18 16:24:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:24:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:06,082 INFO L225 Difference]: With dead ends: 7163 [2022-01-18 16:24:06,083 INFO L226 Difference]: Without dead ends: 6942 [2022-01-18 16:24:06,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=3641, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:24:06,083 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 453 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:06,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 1319 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:24:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2022-01-18 16:24:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 4625. [2022-01-18 16:24:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.9943771626297577) internal successors, (13846), 4624 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13846 transitions. [2022-01-18 16:24:06,151 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13846 transitions. Word has length 42 [2022-01-18 16:24:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:06,151 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 13846 transitions. [2022-01-18 16:24:06,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13846 transitions. [2022-01-18 16:24:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:06,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:06,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:06,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:06,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:06,365 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 992059714, now seen corresponding path program 64 times [2022-01-18 16:24:06,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198351638] [2022-01-18 16:24:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:06,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:06,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198351638] [2022-01-18 16:24:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198351638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580520130] [2022-01-18 16:24:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:06,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:06,588 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:06,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:24:06,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:06,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:06,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:07,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:07,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:07,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:07,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:07,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580520130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:07,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:07,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:07,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495312246] [2022-01-18 16:24:07,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:07,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:07,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:07,534 INFO L87 Difference]: Start difference. First operand 4625 states and 13846 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:10,140 INFO L93 Difference]: Finished difference Result 10325 states and 30196 transitions. [2022-01-18 16:24:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:24:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:10,157 INFO L225 Difference]: With dead ends: 10325 [2022-01-18 16:24:10,157 INFO L226 Difference]: Without dead ends: 10104 [2022-01-18 16:24:10,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=609, Invalid=6033, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:24:10,158 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 458 mSDsluCounter, 2971 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 3640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:10,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 2293 Invalid, 3640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:24:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2022-01-18 16:24:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 4637. [2022-01-18 16:24:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.996333045729077) internal successors, (13891), 4636 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13891 transitions. [2022-01-18 16:24:10,247 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13891 transitions. Word has length 42 [2022-01-18 16:24:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:10,247 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 13891 transitions. [2022-01-18 16:24:10,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13891 transitions. [2022-01-18 16:24:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:10,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:10,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:10,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 16:24:10,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-01-18 16:24:10,453 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 285478750, now seen corresponding path program 65 times [2022-01-18 16:24:10,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193990480] [2022-01-18 16:24:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:10,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:10,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193990480] [2022-01-18 16:24:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193990480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889403335] [2022-01-18 16:24:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:10,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:10,686 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:10,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:24:10,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:10,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:10,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:11,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:11,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:11,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 16:24:11,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:11,730 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 37 treesize of output 35 [2022-01-18 16:24:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:11,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889403335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:11,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:11,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-01-18 16:24:11,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983491521] [2022-01-18 16:24:11,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:11,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:24:11,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:24:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:24:11,883 INFO L87 Difference]: Start difference. First operand 4637 states and 13891 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:15,917 INFO L93 Difference]: Finished difference Result 10734 states and 31541 transitions. [2022-01-18 16:24:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:24:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:15,933 INFO L225 Difference]: With dead ends: 10734 [2022-01-18 16:24:15,933 INFO L226 Difference]: Without dead ends: 10513 [2022-01-18 16:24:15,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=921, Invalid=9179, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:24:15,934 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 687 mSDsluCounter, 3032 mSDsCounter, 0 mSdLazyCounter, 4010 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 4084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 4010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:15,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 2332 Invalid, 4084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 4010 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:24:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10513 states. [2022-01-18 16:24:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10513 to 4641. [2022-01-18 16:24:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9961206896551724) internal successors, (13902), 4640 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13902 transitions. [2022-01-18 16:24:16,048 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13902 transitions. Word has length 42 [2022-01-18 16:24:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:16,048 INFO L470 AbstractCegarLoop]: Abstraction has 4641 states and 13902 transitions. [2022-01-18 16:24:16,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13902 transitions. [2022-01-18 16:24:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:16,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:16,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:16,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:16,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:16,254 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 894054178, now seen corresponding path program 66 times [2022-01-18 16:24:16,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:16,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295521116] [2022-01-18 16:24:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:16,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:16,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295521116] [2022-01-18 16:24:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295521116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144197563] [2022-01-18 16:24:16,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:16,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:16,492 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:16,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:24:16,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:24:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:24:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:16,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:16,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:16,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:17,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:17,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:17,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:17,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:17,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144197563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:17,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:17,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:17,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263719733] [2022-01-18 16:24:17,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:17,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:17,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:17,416 INFO L87 Difference]: Start difference. First operand 4641 states and 13902 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:20,441 INFO L93 Difference]: Finished difference Result 11254 states and 33138 transitions. [2022-01-18 16:24:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:24:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:20,460 INFO L225 Difference]: With dead ends: 11254 [2022-01-18 16:24:20,460 INFO L226 Difference]: Without dead ends: 11068 [2022-01-18 16:24:20,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1037, Invalid=8469, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:24:20,461 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 799 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:20,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 1608 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:24:20,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11068 states. [2022-01-18 16:24:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11068 to 4610. [2022-01-18 16:24:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.992189195053157) internal successors, (13791), 4609 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13791 transitions. [2022-01-18 16:24:20,557 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13791 transitions. Word has length 42 [2022-01-18 16:24:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:20,557 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 13791 transitions. [2022-01-18 16:24:20,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13791 transitions. [2022-01-18 16:24:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:20,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:20,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:20,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 16:24:20,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:20,763 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1867250376, now seen corresponding path program 67 times [2022-01-18 16:24:20,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:20,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984014166] [2022-01-18 16:24:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:20,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:20,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984014166] [2022-01-18 16:24:20,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984014166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369448843] [2022-01-18 16:24:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:20,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:20,992 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:21,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:24:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:21,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:21,338 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 11 treesize of output 7 [2022-01-18 16:24:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:21,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:21,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:21,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:21,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:21,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369448843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:21,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:21,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:21,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129854826] [2022-01-18 16:24:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:21,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:21,962 INFO L87 Difference]: Start difference. First operand 4610 states and 13791 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:23,039 INFO L93 Difference]: Finished difference Result 6149 states and 18176 transitions. [2022-01-18 16:24:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:24:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:23,049 INFO L225 Difference]: With dead ends: 6149 [2022-01-18 16:24:23,049 INFO L226 Difference]: Without dead ends: 5928 [2022-01-18 16:24:23,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=2672, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:24:23,049 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 307 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:23,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1412 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:24:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2022-01-18 16:24:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 4616. [2022-01-18 16:24:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9924160346695556) internal successors, (13810), 4615 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13810 transitions. [2022-01-18 16:24:23,110 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13810 transitions. Word has length 42 [2022-01-18 16:24:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:23,110 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 13810 transitions. [2022-01-18 16:24:23,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13810 transitions. [2022-01-18 16:24:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:23,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:23,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:23,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:23,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:23,315 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1910845426, now seen corresponding path program 68 times [2022-01-18 16:24:23,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:23,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280363629] [2022-01-18 16:24:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:23,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:23,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280363629] [2022-01-18 16:24:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280363629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108151099] [2022-01-18 16:24:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:23,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:23,543 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:24:23,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:23,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:23,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:24,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:24,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:24,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:24,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:24,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:24,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108151099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:24,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:24,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:24,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056828885] [2022-01-18 16:24:24,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:24,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:24,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:24,468 INFO L87 Difference]: Start difference. First operand 4616 states and 13810 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:26,306 INFO L93 Difference]: Finished difference Result 9185 states and 27086 transitions. [2022-01-18 16:24:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:24:26,307 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:26,321 INFO L225 Difference]: With dead ends: 9185 [2022-01-18 16:24:26,321 INFO L226 Difference]: Without dead ends: 8964 [2022-01-18 16:24:26,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=4499, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:24:26,322 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 399 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:26,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1837 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:24:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2022-01-18 16:24:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 4628. [2022-01-18 16:24:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.994380808299114) internal successors, (13855), 4627 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13855 transitions. [2022-01-18 16:24:26,405 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13855 transitions. Word has length 42 [2022-01-18 16:24:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:26,405 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 13855 transitions. [2022-01-18 16:24:26,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13855 transitions. [2022-01-18 16:24:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:26,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:26,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:26,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 16:24:26,611 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1677540906, now seen corresponding path program 69 times [2022-01-18 16:24:26,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561854306] [2022-01-18 16:24:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:26,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:26,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561854306] [2022-01-18 16:24:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561854306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060057026] [2022-01-18 16:24:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:26,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:26,836 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:26,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:24:26,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:24:26,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:27,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:27,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:27,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:27,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:27,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:27,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:27,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060057026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:27,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:27,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:27,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423191372] [2022-01-18 16:24:27,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:27,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:27,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:27,770 INFO L87 Difference]: Start difference. First operand 4628 states and 13855 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:29,768 INFO L93 Difference]: Finished difference Result 9569 states and 28354 transitions. [2022-01-18 16:24:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:24:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:29,784 INFO L225 Difference]: With dead ends: 9569 [2022-01-18 16:24:29,784 INFO L226 Difference]: Without dead ends: 9348 [2022-01-18 16:24:29,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=623, Invalid=5539, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:24:29,785 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 518 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1422 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:24:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9348 states. [2022-01-18 16:24:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9348 to 4632. [2022-01-18 16:24:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.9941697257611746) internal successors, (13866), 4631 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13866 transitions. [2022-01-18 16:24:29,899 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13866 transitions. Word has length 42 [2022-01-18 16:24:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:29,899 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 13866 transitions. [2022-01-18 16:24:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13866 transitions. [2022-01-18 16:24:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:29,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:29,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:29,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:30,105 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2008850962, now seen corresponding path program 70 times [2022-01-18 16:24:30,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579640386] [2022-01-18 16:24:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:30,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:30,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:30,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579640386] [2022-01-18 16:24:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579640386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:30,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681551297] [2022-01-18 16:24:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:30,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:30,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:30,336 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:30,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:24:30,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:30,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:30,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:30,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:31,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:31,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:31,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:31,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:31,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681551297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:31,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:31,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:31,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186926625] [2022-01-18 16:24:31,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:31,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:31,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:31,281 INFO L87 Difference]: Start difference. First operand 4632 states and 13866 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:33,856 INFO L93 Difference]: Finished difference Result 9918 states and 29446 transitions. [2022-01-18 16:24:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:24:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:33,872 INFO L225 Difference]: With dead ends: 9918 [2022-01-18 16:24:33,872 INFO L226 Difference]: Without dead ends: 9732 [2022-01-18 16:24:33,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=817, Invalid=6665, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:24:33,873 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 587 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:33,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 2039 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:24:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2022-01-18 16:24:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 4613. [2022-01-18 16:24:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.9919774501300953) internal successors, (13799), 4612 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13799 transitions. [2022-01-18 16:24:33,949 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13799 transitions. Word has length 42 [2022-01-18 16:24:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:33,950 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 13799 transitions. [2022-01-18 16:24:33,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13799 transitions. [2022-01-18 16:24:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:33,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:33,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:33,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:34,155 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1610682264, now seen corresponding path program 71 times [2022-01-18 16:24:34,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:34,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095447461] [2022-01-18 16:24:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:34,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:34,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095447461] [2022-01-18 16:24:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095447461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807101985] [2022-01-18 16:24:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:34,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:34,372 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:34,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:24:34,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:34,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:34,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:34,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:35,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:35,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:35,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:35,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807101985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:35,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:35,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:35,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021166546] [2022-01-18 16:24:35,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:35,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:35,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:35,296 INFO L87 Difference]: Start difference. First operand 4613 states and 13799 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:36,422 INFO L93 Difference]: Finished difference Result 7712 states and 22961 transitions. [2022-01-18 16:24:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:24:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:36,433 INFO L225 Difference]: With dead ends: 7712 [2022-01-18 16:24:36,434 INFO L226 Difference]: Without dead ends: 7491 [2022-01-18 16:24:36,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:24:36,434 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 326 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1327 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:24:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2022-01-18 16:24:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 4633. [2022-01-18 16:24:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 2.9909326424870466) internal successors, (13854), 4632 states have internal predecessors, (13854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 13854 transitions. [2022-01-18 16:24:36,506 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 13854 transitions. Word has length 42 [2022-01-18 16:24:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:36,506 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 13854 transitions. [2022-01-18 16:24:36,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 13854 transitions. [2022-01-18 16:24:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:36,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:36,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:36,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:36,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 16:24:36,712 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2075709604, now seen corresponding path program 72 times [2022-01-18 16:24:36,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:36,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204639726] [2022-01-18 16:24:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:36,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:36,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204639726] [2022-01-18 16:24:36,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204639726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923982353] [2022-01-18 16:24:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:36,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:36,980 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:24:37,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:24:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:24:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:37,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:37,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:37,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:37,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:37,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:37,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:37,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923982353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:37,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:37,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:37,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882101452] [2022-01-18 16:24:37,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:37,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:37,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:37,938 INFO L87 Difference]: Start difference. First operand 4633 states and 13854 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:39,372 INFO L93 Difference]: Finished difference Result 7638 states and 22764 transitions. [2022-01-18 16:24:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:24:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:39,384 INFO L225 Difference]: With dead ends: 7638 [2022-01-18 16:24:39,384 INFO L226 Difference]: Without dead ends: 7452 [2022-01-18 16:24:39,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:24:39,384 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 316 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:39,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1636 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:24:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7452 states. [2022-01-18 16:24:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7452 to 4629. [2022-01-18 16:24:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.99114088159032) internal successors, (13843), 4628 states have internal predecessors, (13843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13843 transitions. [2022-01-18 16:24:39,460 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13843 transitions. Word has length 42 [2022-01-18 16:24:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:39,460 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 13843 transitions. [2022-01-18 16:24:39,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13843 transitions. [2022-01-18 16:24:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:39,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:39,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:39,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:39,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 16:24:39,666 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -595552422, now seen corresponding path program 73 times [2022-01-18 16:24:39,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242097816] [2022-01-18 16:24:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:39,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:39,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242097816] [2022-01-18 16:24:39,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242097816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698979768] [2022-01-18 16:24:39,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:39,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:39,889 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:39,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:24:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:40,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:40,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:40,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:40,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:40,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:40,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:40,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698979768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:40,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:40,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749507741] [2022-01-18 16:24:40,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:40,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:40,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:40,805 INFO L87 Difference]: Start difference. First operand 4629 states and 13843 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:41,987 INFO L93 Difference]: Finished difference Result 7656 states and 22829 transitions. [2022-01-18 16:24:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:24:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:41,999 INFO L225 Difference]: With dead ends: 7656 [2022-01-18 16:24:41,999 INFO L226 Difference]: Without dead ends: 7470 [2022-01-18 16:24:41,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:24:41,999 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 312 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:41,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1417 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1807 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:24:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7470 states. [2022-01-18 16:24:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7470 to 4625. [2022-01-18 16:24:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.991349480968858) internal successors, (13832), 4624 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13832 transitions. [2022-01-18 16:24:42,069 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13832 transitions. Word has length 42 [2022-01-18 16:24:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 13832 transitions. [2022-01-18 16:24:42,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13832 transitions. [2022-01-18 16:24:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:42,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:42,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:42,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:42,275 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1243251966, now seen corresponding path program 74 times [2022-01-18 16:24:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029055639] [2022-01-18 16:24:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:42,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:42,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029055639] [2022-01-18 16:24:42,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029055639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:42,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322670430] [2022-01-18 16:24:42,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:42,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:42,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:42,493 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:24:42,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:42,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:42,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:42,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:43,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:43,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:43,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:43,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:43,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322670430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:43,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:43,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:43,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578080646] [2022-01-18 16:24:43,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:43,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:43,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:43,402 INFO L87 Difference]: Start difference. First operand 4625 states and 13832 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:44,738 INFO L93 Difference]: Finished difference Result 7801 states and 23081 transitions. [2022-01-18 16:24:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:24:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:44,749 INFO L225 Difference]: With dead ends: 7801 [2022-01-18 16:24:44,749 INFO L226 Difference]: Without dead ends: 7580 [2022-01-18 16:24:44,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=3300, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:24:44,749 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 367 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:44,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1559 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:24:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2022-01-18 16:24:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 4637. [2022-01-18 16:24:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.993313201035375) internal successors, (13877), 4636 states have internal predecessors, (13877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13877 transitions. [2022-01-18 16:24:44,818 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13877 transitions. Word has length 42 [2022-01-18 16:24:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 13877 transitions. [2022-01-18 16:24:44,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13877 transitions. [2022-01-18 16:24:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:44,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:44,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:44,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:45,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:45,025 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 536671002, now seen corresponding path program 75 times [2022-01-18 16:24:45,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401681946] [2022-01-18 16:24:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:45,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:45,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401681946] [2022-01-18 16:24:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401681946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670632333] [2022-01-18 16:24:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:45,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:45,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:45,244 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:24:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:24:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:45,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:45,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:45,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:45,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:45,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:46,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:46,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670632333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:46,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721815966] [2022-01-18 16:24:46,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:46,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:46,183 INFO L87 Difference]: Start difference. First operand 4637 states and 13877 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:48,142 INFO L93 Difference]: Finished difference Result 8432 states and 24887 transitions. [2022-01-18 16:24:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:24:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:48,155 INFO L225 Difference]: With dead ends: 8432 [2022-01-18 16:24:48,155 INFO L226 Difference]: Without dead ends: 8211 [2022-01-18 16:24:48,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=526, Invalid=4586, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:24:48,156 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 428 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 2767 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:48,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 1963 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2767 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:24:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-01-18 16:24:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 4641. [2022-01-18 16:24:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9931034482758623) internal successors, (13888), 4640 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13888 transitions. [2022-01-18 16:24:48,237 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13888 transitions. Word has length 42 [2022-01-18 16:24:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:48,238 INFO L470 AbstractCegarLoop]: Abstraction has 4641 states and 13888 transitions. [2022-01-18 16:24:48,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13888 transitions. [2022-01-18 16:24:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:48,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:48,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:48,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:48,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 16:24:48,443 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1145246430, now seen corresponding path program 76 times [2022-01-18 16:24:48,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796962423] [2022-01-18 16:24:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:48,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:48,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796962423] [2022-01-18 16:24:48,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796962423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341870184] [2022-01-18 16:24:48,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:48,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:48,661 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:24:48,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:48,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:48,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:49,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:49,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:49,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:49,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:49,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:49,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341870184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:49,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:49,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 16:24:49,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130769964] [2022-01-18 16:24:49,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:49,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:49,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:49,578 INFO L87 Difference]: Start difference. First operand 4641 states and 13888 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:51,637 INFO L93 Difference]: Finished difference Result 8689 states and 25755 transitions. [2022-01-18 16:24:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:24:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:51,651 INFO L225 Difference]: With dead ends: 8689 [2022-01-18 16:24:51,651 INFO L226 Difference]: Without dead ends: 8503 [2022-01-18 16:24:51,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=704, Invalid=5776, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:24:51,652 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 576 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:51,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1647 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:24:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-01-18 16:24:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 4598. [2022-01-18 16:24:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.993038938438112) internal successors, (13759), 4597 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13759 transitions. [2022-01-18 16:24:51,734 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13759 transitions. Word has length 42 [2022-01-18 16:24:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:51,734 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 13759 transitions. [2022-01-18 16:24:51,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13759 transitions. [2022-01-18 16:24:51,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:51,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:51,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:51,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:51,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:51,940 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash -530935530, now seen corresponding path program 77 times [2022-01-18 16:24:51,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010828616] [2022-01-18 16:24:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:51,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:52,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:52,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010828616] [2022-01-18 16:24:52,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010828616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:52,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721858769] [2022-01-18 16:24:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:52,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:52,179 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:52,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:24:52,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:24:52,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:24:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:52,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:52,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:52,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:52,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:52,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:53,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:53,058 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 30 treesize of output 30 [2022-01-18 16:24:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:53,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721858769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:53,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:53,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-01-18 16:24:53,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261864867] [2022-01-18 16:24:53,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:53,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:24:53,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:24:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:24:53,197 INFO L87 Difference]: Start difference. First operand 4598 states and 13759 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:55,632 INFO L93 Difference]: Finished difference Result 8560 states and 24470 transitions. [2022-01-18 16:24:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:24:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:55,645 INFO L225 Difference]: With dead ends: 8560 [2022-01-18 16:24:55,646 INFO L226 Difference]: Without dead ends: 8204 [2022-01-18 16:24:55,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=770, Invalid=7420, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:24:55,647 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 541 mSDsluCounter, 3139 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:55,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 2358 Invalid, 3400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:24:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8204 states. [2022-01-18 16:24:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8204 to 4950. [2022-01-18 16:24:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4950 states, 4949 states have (on average 2.96868054152354) internal successors, (14692), 4949 states have internal predecessors, (14692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4950 states to 4950 states and 14692 transitions. [2022-01-18 16:24:55,725 INFO L78 Accepts]: Start accepts. Automaton has 4950 states and 14692 transitions. Word has length 42 [2022-01-18 16:24:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:55,725 INFO L470 AbstractCegarLoop]: Abstraction has 4950 states and 14692 transitions. [2022-01-18 16:24:55,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4950 states and 14692 transitions. [2022-01-18 16:24:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:55,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:55,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:55,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:55,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:55,932 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1309844874, now seen corresponding path program 78 times [2022-01-18 16:24:55,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836004720] [2022-01-18 16:24:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:56,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836004720] [2022-01-18 16:24:56,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836004720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570105463] [2022-01-18 16:24:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:56,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:56,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:56,128 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:56,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:24:56,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:24:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:24:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:56,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:56,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:24:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:56,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:56,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:56,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:56,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570105463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:57,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-01-18 16:24:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251968998] [2022-01-18 16:24:57,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:24:57,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:24:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:24:57,004 INFO L87 Difference]: Start difference. First operand 4950 states and 14692 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:58,187 INFO L93 Difference]: Finished difference Result 7129 states and 20856 transitions. [2022-01-18 16:24:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:24:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:24:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:58,198 INFO L225 Difference]: With dead ends: 7129 [2022-01-18 16:24:58,198 INFO L226 Difference]: Without dead ends: 6926 [2022-01-18 16:24:58,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:24:58,199 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 330 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:58,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1973 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:24:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2022-01-18 16:24:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 4646. [2022-01-18 16:24:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.9909580193756726) internal successors, (13893), 4645 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 13893 transitions. [2022-01-18 16:24:58,265 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 13893 transitions. Word has length 42 [2022-01-18 16:24:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 13893 transitions. [2022-01-18 16:24:58,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 13893 transitions. [2022-01-18 16:24:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:24:58,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:58,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:58,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:58,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-01-18 16:24:58,472 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:24:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1282247336, now seen corresponding path program 79 times [2022-01-18 16:24:58,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:58,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171843754] [2022-01-18 16:24:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:58,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:58,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171843754] [2022-01-18 16:24:58,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171843754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687183950] [2022-01-18 16:24:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:58,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:58,718 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:58,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:24:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:24:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:58,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:59,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:24:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:59,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:59,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:59,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:24:59,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:59,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:24:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687183950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:59,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:24:59,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371989645] [2022-01-18 16:24:59,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:59,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:24:59,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:24:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:24:59,602 INFO L87 Difference]: Start difference. First operand 4646 states and 13893 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:01,174 INFO L93 Difference]: Finished difference Result 7187 states and 20920 transitions. [2022-01-18 16:25:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:25:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:01,185 INFO L225 Difference]: With dead ends: 7187 [2022-01-18 16:25:01,185 INFO L226 Difference]: Without dead ends: 6966 [2022-01-18 16:25:01,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=3764, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:25:01,186 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 407 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:01,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1626 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:25:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2022-01-18 16:25:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 4649. [2022-01-18 16:25:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.991394148020654) internal successors, (13904), 4648 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13904 transitions. [2022-01-18 16:25:01,254 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13904 transitions. Word has length 42 [2022-01-18 16:25:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:01,254 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 13904 transitions. [2022-01-18 16:25:01,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13904 transitions. [2022-01-18 16:25:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:01,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:01,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:01,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 16:25:01,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:01,460 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1238652286, now seen corresponding path program 80 times [2022-01-18 16:25:01,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009643404] [2022-01-18 16:25:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:01,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:01,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009643404] [2022-01-18 16:25:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009643404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7993699] [2022-01-18 16:25:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:01,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:01,678 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:01,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:25:01,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:01,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:02,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:02,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:02,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:02,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:02,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:02,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7993699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:02,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:02,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:02,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802160818] [2022-01-18 16:25:02,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:02,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:02,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:02,696 INFO L87 Difference]: Start difference. First operand 4649 states and 13904 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:05,138 INFO L93 Difference]: Finished difference Result 10349 states and 30254 transitions. [2022-01-18 16:25:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 16:25:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:05,155 INFO L225 Difference]: With dead ends: 10349 [2022-01-18 16:25:05,156 INFO L226 Difference]: Without dead ends: 10128 [2022-01-18 16:25:05,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=612, Invalid=6194, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:25:05,157 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 517 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:05,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1755 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:25:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10128 states. [2022-01-18 16:25:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10128 to 4661. [2022-01-18 16:25:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.9933476394849787) internal successors, (13949), 4660 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13949 transitions. [2022-01-18 16:25:05,282 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13949 transitions. Word has length 42 [2022-01-18 16:25:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:05,282 INFO L470 AbstractCegarLoop]: Abstraction has 4661 states and 13949 transitions. [2022-01-18 16:25:05,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13949 transitions. [2022-01-18 16:25:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:05,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:05,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:05,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:05,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:05,487 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash 532071322, now seen corresponding path program 81 times [2022-01-18 16:25:05,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445389890] [2022-01-18 16:25:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:05,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:05,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:05,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445389890] [2022-01-18 16:25:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445389890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:05,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323261904] [2022-01-18 16:25:05,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:05,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:05,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:05,705 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:05,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:25:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:25:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:05,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:25:05,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:06,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:06,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:06,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:06,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:06,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323261904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:06,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:06,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:06,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953046970] [2022-01-18 16:25:06,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:06,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:06,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:06,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:06,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:06,575 INFO L87 Difference]: Start difference. First operand 4661 states and 13949 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:09,761 INFO L93 Difference]: Finished difference Result 10758 states and 31599 transitions. [2022-01-18 16:25:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:25:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:09,778 INFO L225 Difference]: With dead ends: 10758 [2022-01-18 16:25:09,778 INFO L226 Difference]: Without dead ends: 10537 [2022-01-18 16:25:09,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=836, Invalid=7720, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:25:09,779 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 589 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 3183 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:09,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1955 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3183 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:25:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10537 states. [2022-01-18 16:25:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10537 to 4665. [2022-01-18 16:25:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.993138936535163) internal successors, (13960), 4664 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13960 transitions. [2022-01-18 16:25:09,868 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13960 transitions. Word has length 42 [2022-01-18 16:25:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:09,868 INFO L470 AbstractCegarLoop]: Abstraction has 4665 states and 13960 transitions. [2022-01-18 16:25:09,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13960 transitions. [2022-01-18 16:25:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:09,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:09,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:09,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:10,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 16:25:10,074 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1140646750, now seen corresponding path program 82 times [2022-01-18 16:25:10,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:10,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539372203] [2022-01-18 16:25:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:10,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:10,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539372203] [2022-01-18 16:25:10,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539372203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154724877] [2022-01-18 16:25:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:10,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:10,294 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:10,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:25:10,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:10,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:10,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:10,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:10,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:10,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:10,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:11,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:11,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:11,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154724877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:11,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345675720] [2022-01-18 16:25:11,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:11,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:11,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:11,175 INFO L87 Difference]: Start difference. First operand 4665 states and 13960 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:14,448 INFO L93 Difference]: Finished difference Result 11278 states and 33196 transitions. [2022-01-18 16:25:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:25:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:14,466 INFO L225 Difference]: With dead ends: 11278 [2022-01-18 16:25:14,466 INFO L226 Difference]: Without dead ends: 11092 [2022-01-18 16:25:14,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1036, Invalid=8666, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:25:14,468 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 713 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:14,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1826 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:25:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2022-01-18 16:25:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 4634. [2022-01-18 16:25:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 2.989207856680337) internal successors, (13849), 4633 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 13849 transitions. [2022-01-18 16:25:14,589 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 13849 transitions. Word has length 42 [2022-01-18 16:25:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:14,589 INFO L470 AbstractCegarLoop]: Abstraction has 4634 states and 13849 transitions. [2022-01-18 16:25:14,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 13849 transitions. [2022-01-18 16:25:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:14,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:14,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:14,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:14,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:14,795 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1620657804, now seen corresponding path program 83 times [2022-01-18 16:25:14,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:14,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804896211] [2022-01-18 16:25:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:14,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:15,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804896211] [2022-01-18 16:25:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804896211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256480801] [2022-01-18 16:25:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:15,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:15,011 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:25:15,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:15,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:15,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:25:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:15,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:15,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:15,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:15,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:15,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:15,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256480801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:15,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:15,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:15,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385351707] [2022-01-18 16:25:15,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:15,882 INFO L87 Difference]: Start difference. First operand 4634 states and 13849 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:17,049 INFO L93 Difference]: Finished difference Result 6173 states and 18234 transitions. [2022-01-18 16:25:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:25:17,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:17,058 INFO L225 Difference]: With dead ends: 6173 [2022-01-18 16:25:17,058 INFO L226 Difference]: Without dead ends: 5952 [2022-01-18 16:25:17,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:25:17,059 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 303 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:17,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 1474 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:25:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5952 states. [2022-01-18 16:25:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5952 to 4640. [2022-01-18 16:25:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4639 states have (on average 2.989437378745419) internal successors, (13868), 4639 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 13868 transitions. [2022-01-18 16:25:17,120 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 13868 transitions. Word has length 42 [2022-01-18 16:25:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:17,120 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 13868 transitions. [2022-01-18 16:25:17,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 13868 transitions. [2022-01-18 16:25:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:17,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:17,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:17,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:17,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:17,326 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1664252854, now seen corresponding path program 84 times [2022-01-18 16:25:17,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:17,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413756414] [2022-01-18 16:25:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:17,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:17,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413756414] [2022-01-18 16:25:17,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413756414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290425959] [2022-01-18 16:25:17,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:17,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:17,564 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:25:17,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:17,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:17,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:17,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:18,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:18,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:18,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:18,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:18,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:18,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290425959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:18,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:18,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:18,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133190274] [2022-01-18 16:25:18,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:18,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:18,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:18,465 INFO L87 Difference]: Start difference. First operand 4640 states and 13868 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:20,149 INFO L93 Difference]: Finished difference Result 9209 states and 27144 transitions. [2022-01-18 16:25:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:25:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:20,165 INFO L225 Difference]: With dead ends: 9209 [2022-01-18 16:25:20,165 INFO L226 Difference]: Without dead ends: 8988 [2022-01-18 16:25:20,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:25:20,166 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 432 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:20,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1340 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:25:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2022-01-18 16:25:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 4652. [2022-01-18 16:25:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9913996989894645) internal successors, (13913), 4651 states have internal predecessors, (13913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13913 transitions. [2022-01-18 16:25:20,286 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13913 transitions. Word has length 42 [2022-01-18 16:25:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:20,286 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 13913 transitions. [2022-01-18 16:25:20,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13913 transitions. [2022-01-18 16:25:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:20,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:20,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:20,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 16:25:20,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:20,492 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1924133478, now seen corresponding path program 85 times [2022-01-18 16:25:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023463678] [2022-01-18 16:25:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:20,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:20,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023463678] [2022-01-18 16:25:20,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023463678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947807725] [2022-01-18 16:25:20,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:20,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:20,710 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:25:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:20,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:20,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:21,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:21,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:21,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:21,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947807725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:21,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73954334] [2022-01-18 16:25:21,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:21,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:21,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:21,605 INFO L87 Difference]: Start difference. First operand 4652 states and 13913 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:23,990 INFO L93 Difference]: Finished difference Result 9593 states and 28412 transitions. [2022-01-18 16:25:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:25:23,990 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:24,004 INFO L225 Difference]: With dead ends: 9593 [2022-01-18 16:25:24,005 INFO L226 Difference]: Without dead ends: 9372 [2022-01-18 16:25:24,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=626, Invalid=5694, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:25:24,005 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 457 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:24,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1897 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:25:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-01-18 16:25:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 4656. [2022-01-18 16:25:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.9911922663802364) internal successors, (13924), 4655 states have internal predecessors, (13924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 13924 transitions. [2022-01-18 16:25:24,087 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 13924 transitions. Word has length 42 [2022-01-18 16:25:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:24,087 INFO L470 AbstractCegarLoop]: Abstraction has 4656 states and 13924 transitions. [2022-01-18 16:25:24,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 13924 transitions. [2022-01-18 16:25:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:24,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:24,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:24,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:24,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-01-18 16:25:24,293 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1762258390, now seen corresponding path program 86 times [2022-01-18 16:25:24,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663286401] [2022-01-18 16:25:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:24,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:24,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663286401] [2022-01-18 16:25:24,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663286401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822336561] [2022-01-18 16:25:24,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:24,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:24,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:24,515 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:24,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:25:24,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:24,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:24,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:24,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:24,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:25,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:25,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:25,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:25,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:25,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822336561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:25,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:25,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:25,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215499374] [2022-01-18 16:25:25,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:25,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:25,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:25,404 INFO L87 Difference]: Start difference. First operand 4656 states and 13924 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:27,916 INFO L93 Difference]: Finished difference Result 9942 states and 29504 transitions. [2022-01-18 16:25:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:25:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:27,933 INFO L225 Difference]: With dead ends: 9942 [2022-01-18 16:25:27,933 INFO L226 Difference]: Without dead ends: 9756 [2022-01-18 16:25:27,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=818, Invalid=6838, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:25:27,934 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 620 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:27,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1660 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:25:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9756 states. [2022-01-18 16:25:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9756 to 4637. [2022-01-18 16:25:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.98899913718723) internal successors, (13857), 4636 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13857 transitions. [2022-01-18 16:25:28,025 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13857 transitions. Word has length 42 [2022-01-18 16:25:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:28,026 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 13857 transitions. [2022-01-18 16:25:28,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13857 transitions. [2022-01-18 16:25:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:28,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:28,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:28,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 16:25:28,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:28,231 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1857274836, now seen corresponding path program 87 times [2022-01-18 16:25:28,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:28,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595474952] [2022-01-18 16:25:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:28,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:28,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595474952] [2022-01-18 16:25:28,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595474952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166592306] [2022-01-18 16:25:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:28,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:28,453 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:28,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:25:28,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:25:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:28,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:25:28,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:28,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:29,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:29,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:29,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:29,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:29,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166592306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:29,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:29,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:29,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48985730] [2022-01-18 16:25:29,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:29,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:29,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:29,362 INFO L87 Difference]: Start difference. First operand 4637 states and 13857 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:30,502 INFO L93 Difference]: Finished difference Result 7736 states and 23019 transitions. [2022-01-18 16:25:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:25:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:30,515 INFO L225 Difference]: With dead ends: 7736 [2022-01-18 16:25:30,515 INFO L226 Difference]: Without dead ends: 7515 [2022-01-18 16:25:30,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=2943, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:25:30,516 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 297 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:30,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1296 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:25:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7515 states. [2022-01-18 16:25:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7515 to 4657. [2022-01-18 16:25:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.9879725085910653) internal successors, (13912), 4656 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 13912 transitions. [2022-01-18 16:25:30,599 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 13912 transitions. Word has length 42 [2022-01-18 16:25:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:30,600 INFO L470 AbstractCegarLoop]: Abstraction has 4657 states and 13912 transitions. [2022-01-18 16:25:30,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 13912 transitions. [2022-01-18 16:25:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:30,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:30,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:30,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 16:25:30,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:30,806 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1829117032, now seen corresponding path program 88 times [2022-01-18 16:25:30,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:30,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086382868] [2022-01-18 16:25:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:30,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:31,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086382868] [2022-01-18 16:25:31,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086382868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947377553] [2022-01-18 16:25:31,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:31,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:31,052 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:31,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:25:31,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:31,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:31,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:31,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:31,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:31,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:31,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:31,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947377553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:31,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:31,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:31,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943492003] [2022-01-18 16:25:31,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:31,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:31,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:31,935 INFO L87 Difference]: Start difference. First operand 4657 states and 13912 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:33,344 INFO L93 Difference]: Finished difference Result 7662 states and 22822 transitions. [2022-01-18 16:25:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:25:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:33,356 INFO L225 Difference]: With dead ends: 7662 [2022-01-18 16:25:33,356 INFO L226 Difference]: Without dead ends: 7476 [2022-01-18 16:25:33,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=468, Invalid=3564, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:25:33,357 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 336 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:33,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1444 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:25:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2022-01-18 16:25:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 4653. [2022-01-18 16:25:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.988177128116939) internal successors, (13901), 4652 states have internal predecessors, (13901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13901 transitions. [2022-01-18 16:25:33,431 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13901 transitions. Word has length 42 [2022-01-18 16:25:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 4653 states and 13901 transitions. [2022-01-18 16:25:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13901 transitions. [2022-01-18 16:25:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:33,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:33,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:33,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:33,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:33,636 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash -348959850, now seen corresponding path program 89 times [2022-01-18 16:25:33,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:33,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12737937] [2022-01-18 16:25:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:33,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:33,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:33,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12737937] [2022-01-18 16:25:33,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12737937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:33,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995009302] [2022-01-18 16:25:33,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:33,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:33,856 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:33,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:25:33,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:34,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:34,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:25:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:34,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:34,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:34,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:34,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:34,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:34,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995009302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:34,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:34,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727986642] [2022-01-18 16:25:34,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:34,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:34,732 INFO L87 Difference]: Start difference. First operand 4653 states and 13901 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:36,066 INFO L93 Difference]: Finished difference Result 7680 states and 22887 transitions. [2022-01-18 16:25:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:25:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:36,079 INFO L225 Difference]: With dead ends: 7680 [2022-01-18 16:25:36,079 INFO L226 Difference]: Without dead ends: 7494 [2022-01-18 16:25:36,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=3033, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:25:36,079 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 285 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:36,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 1677 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:25:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7494 states. [2022-01-18 16:25:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7494 to 4649. [2022-01-18 16:25:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.988382099827883) internal successors, (13890), 4648 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13890 transitions. [2022-01-18 16:25:36,151 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13890 transitions. Word has length 42 [2022-01-18 16:25:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 13890 transitions. [2022-01-18 16:25:36,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13890 transitions. [2022-01-18 16:25:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:36,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:36,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:36,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:36,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:36,357 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1489844538, now seen corresponding path program 90 times [2022-01-18 16:25:36,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:36,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080683148] [2022-01-18 16:25:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:36,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:36,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:36,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080683148] [2022-01-18 16:25:36,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080683148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:36,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714742768] [2022-01-18 16:25:36,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:36,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:36,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:36,611 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:36,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:25:36,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:36,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:36,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:37,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:37,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:37,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:37,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714742768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:37,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:37,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632594524] [2022-01-18 16:25:37,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:37,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:37,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:37,524 INFO L87 Difference]: Start difference. First operand 4649 states and 13890 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:38,878 INFO L93 Difference]: Finished difference Result 7825 states and 23139 transitions. [2022-01-18 16:25:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:25:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:38,890 INFO L225 Difference]: With dead ends: 7825 [2022-01-18 16:25:38,891 INFO L226 Difference]: Without dead ends: 7604 [2022-01-18 16:25:38,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=3415, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:25:38,891 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 340 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:38,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 1490 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:25:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7604 states. [2022-01-18 16:25:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7604 to 4661. [2022-01-18 16:25:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.990343347639485) internal successors, (13935), 4660 states have internal predecessors, (13935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13935 transitions. [2022-01-18 16:25:38,967 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13935 transitions. Word has length 42 [2022-01-18 16:25:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:38,967 INFO L470 AbstractCegarLoop]: Abstraction has 4661 states and 13935 transitions. [2022-01-18 16:25:38,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13935 transitions. [2022-01-18 16:25:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:38,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:38,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:38,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:39,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 16:25:39,172 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 783263574, now seen corresponding path program 91 times [2022-01-18 16:25:39,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:39,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167529331] [2022-01-18 16:25:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:39,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:39,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:39,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167529331] [2022-01-18 16:25:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167529331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:39,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076725155] [2022-01-18 16:25:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:39,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:39,392 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:39,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:25:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:39,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:39,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:39,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:40,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:40,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:40,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:40,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076725155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:40,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:40,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358398150] [2022-01-18 16:25:40,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:40,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:40,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:40,280 INFO L87 Difference]: Start difference. First operand 4661 states and 13935 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:42,166 INFO L93 Difference]: Finished difference Result 8456 states and 24945 transitions. [2022-01-18 16:25:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:25:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:42,180 INFO L225 Difference]: With dead ends: 8456 [2022-01-18 16:25:42,180 INFO L226 Difference]: Without dead ends: 8235 [2022-01-18 16:25:42,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=531, Invalid=4725, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:25:42,180 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 442 mSDsluCounter, 2285 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:42,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1745 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:25:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2022-01-18 16:25:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 4665. [2022-01-18 16:25:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.990137221269297) internal successors, (13946), 4664 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13946 transitions. [2022-01-18 16:25:42,258 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13946 transitions. Word has length 42 [2022-01-18 16:25:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:42,258 INFO L470 AbstractCegarLoop]: Abstraction has 4665 states and 13946 transitions. [2022-01-18 16:25:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13946 transitions. [2022-01-18 16:25:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:42,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:42,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:42,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:42,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 16:25:42,465 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1391839002, now seen corresponding path program 92 times [2022-01-18 16:25:42,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:42,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487525841] [2022-01-18 16:25:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:42,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:42,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487525841] [2022-01-18 16:25:42,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487525841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802235607] [2022-01-18 16:25:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:42,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:42,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:42,694 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:42,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:25:42,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:42,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:42,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:42,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:43,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:43,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:43,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:43,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:43,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802235607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:43,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:43,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:43,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324708080] [2022-01-18 16:25:43,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:43,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:43,569 INFO L87 Difference]: Start difference. First operand 4665 states and 13946 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:45,920 INFO L93 Difference]: Finished difference Result 8713 states and 25813 transitions. [2022-01-18 16:25:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:25:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:45,934 INFO L225 Difference]: With dead ends: 8713 [2022-01-18 16:25:45,934 INFO L226 Difference]: Without dead ends: 8527 [2022-01-18 16:25:45,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=707, Invalid=5935, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:25:45,935 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 518 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 2995 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:45,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 2194 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2995 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:25:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-01-18 16:25:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 4610. [2022-01-18 16:25:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.99153829464092) internal successors, (13788), 4609 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13788 transitions. [2022-01-18 16:25:46,015 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13788 transitions. Word has length 42 [2022-01-18 16:25:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:46,016 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 13788 transitions. [2022-01-18 16:25:46,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13788 transitions. [2022-01-18 16:25:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:46,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:46,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:46,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 16:25:46,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 16:25:46,222 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1040412390, now seen corresponding path program 93 times [2022-01-18 16:25:46,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:46,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143685010] [2022-01-18 16:25:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:46,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:46,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143685010] [2022-01-18 16:25:46,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143685010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977722301] [2022-01-18 16:25:46,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:46,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:46,440 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:46,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:25:46,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:25:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:25:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:46,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:46,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:47,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:47,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:47,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:47,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:47,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977722301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:47,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:47,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:47,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180557711] [2022-01-18 16:25:47,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:47,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:47,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:47,357 INFO L87 Difference]: Start difference. First operand 4610 states and 13788 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:48,707 INFO L93 Difference]: Finished difference Result 6781 states and 19902 transitions. [2022-01-18 16:25:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:25:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:48,720 INFO L225 Difference]: With dead ends: 6781 [2022-01-18 16:25:48,720 INFO L226 Difference]: Without dead ends: 6530 [2022-01-18 16:25:48,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:25:48,721 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 338 mSDsluCounter, 2678 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:48,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 2158 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:25:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2022-01-18 16:25:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 4598. [2022-01-18 16:25:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.9923863389166847) internal successors, (13756), 4597 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13756 transitions. [2022-01-18 16:25:48,795 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13756 transitions. Word has length 42 [2022-01-18 16:25:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:48,795 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 13756 transitions. [2022-01-18 16:25:48,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13756 transitions. [2022-01-18 16:25:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:48,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:48,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:48,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 16:25:49,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:49,002 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 772770476, now seen corresponding path program 94 times [2022-01-18 16:25:49,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:49,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445048618] [2022-01-18 16:25:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:49,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:49,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445048618] [2022-01-18 16:25:49,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445048618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977464883] [2022-01-18 16:25:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:49,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:49,217 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:49,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:25:49,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:49,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:49,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:49,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:49,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:49,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:49,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:50,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:50,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:25:50,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977464883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:50,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:50,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:25:50,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342633706] [2022-01-18 16:25:50,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:50,147 INFO L87 Difference]: Start difference. First operand 4598 states and 13756 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:51,861 INFO L93 Difference]: Finished difference Result 7163 states and 20844 transitions. [2022-01-18 16:25:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:25:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:51,871 INFO L225 Difference]: With dead ends: 7163 [2022-01-18 16:25:51,872 INFO L226 Difference]: Without dead ends: 6942 [2022-01-18 16:25:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:25:51,872 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 409 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:51,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1833 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:25:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2022-01-18 16:25:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 4601. [2022-01-18 16:25:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.9928260869565215) internal successors, (13767), 4600 states have internal predecessors, (13767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 13767 transitions. [2022-01-18 16:25:51,939 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 13767 transitions. Word has length 42 [2022-01-18 16:25:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:51,939 INFO L470 AbstractCegarLoop]: Abstraction has 4601 states and 13767 transitions. [2022-01-18 16:25:51,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 13767 transitions. [2022-01-18 16:25:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:51,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:51,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:51,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 16:25:52,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 16:25:52,145 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 729175426, now seen corresponding path program 95 times [2022-01-18 16:25:52,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037254242] [2022-01-18 16:25:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:52,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:25:52,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037254242] [2022-01-18 16:25:52,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037254242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318249786] [2022-01-18 16:25:52,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:52,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:52,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:52,366 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:52,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:25:52,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:25:52,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:52,679 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 [2022-01-18 16:25:52,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:52,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-01-18 16:25:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:53,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:53,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:53,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:53,573 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 16:25:53,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 42 [2022-01-18 16:25:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:53,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318249786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:53,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 40 [2022-01-18 16:25:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586001427] [2022-01-18 16:25:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:53,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:25:53,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:25:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:25:53,711 INFO L87 Difference]: Start difference. First operand 4601 states and 13767 transitions. Second operand has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:56,635 INFO L93 Difference]: Finished difference Result 8813 states and 25517 transitions. [2022-01-18 16:25:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:25:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:25:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:56,648 INFO L225 Difference]: With dead ends: 8813 [2022-01-18 16:25:56,648 INFO L226 Difference]: Without dead ends: 8405 [2022-01-18 16:25:56,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1109, Invalid=8593, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:25:56,649 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 528 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2490 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:56,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 1866 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1763 Invalid, 0 Unknown, 2490 Unchecked, 0.8s Time] [2022-01-18 16:25:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8405 states. [2022-01-18 16:25:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8405 to 4700. [2022-01-18 16:25:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4700 states, 4699 states have (on average 2.98701851457757) internal successors, (14036), 4699 states have internal predecessors, (14036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 14036 transitions. [2022-01-18 16:25:56,727 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 14036 transitions. Word has length 42 [2022-01-18 16:25:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:56,727 INFO L470 AbstractCegarLoop]: Abstraction has 4700 states and 14036 transitions. [2022-01-18 16:25:56,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 14036 transitions. [2022-01-18 16:25:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:25:56,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:56,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:56,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 16:25:56,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:56,933 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:25:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:56,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1470067466, now seen corresponding path program 96 times [2022-01-18 16:25:56,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:56,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76599481] [2022-01-18 16:25:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:56,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:57,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:57,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76599481] [2022-01-18 16:25:57,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76599481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:57,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711906268] [2022-01-18 16:25:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:57,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:57,126 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:25:57,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:57,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:25:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:57,312 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 11 treesize of output 7 [2022-01-18 16:25:57,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:25:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:57,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:57,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:25:57,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:25:57,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:25:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:58,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711906268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:58,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:58,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-01-18 16:25:58,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389670483] [2022-01-18 16:25:58,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:58,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:25:58,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:25:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:25:58,001 INFO L87 Difference]: Start difference. First operand 4700 states and 14036 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:00,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:00,934 INFO L93 Difference]: Finished difference Result 10408 states and 30399 transitions. [2022-01-18 16:26:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:26:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:00,951 INFO L225 Difference]: With dead ends: 10408 [2022-01-18 16:26:00,951 INFO L226 Difference]: Without dead ends: 10171 [2022-01-18 16:26:00,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=592, Invalid=5728, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:26:00,951 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 449 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 4086 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:00,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2741 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4086 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:26:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2022-01-18 16:26:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 4613. [2022-01-18 16:26:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.99479618386817) internal successors, (13812), 4612 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13812 transitions. [2022-01-18 16:26:01,041 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13812 transitions. Word has length 42 [2022-01-18 16:26:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:01,042 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 13812 transitions. [2022-01-18 16:26:01,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13812 transitions. [2022-01-18 16:26:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:01,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:01,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:01,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 16:26:01,247 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash 22594462, now seen corresponding path program 97 times [2022-01-18 16:26:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658335985] [2022-01-18 16:26:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:01,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:01,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:01,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658335985] [2022-01-18 16:26:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658335985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:01,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399883899] [2022-01-18 16:26:01,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:01,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:01,466 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:01,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 16:26:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:01,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:01,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:01,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:02,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:02,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:02,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:02,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:02,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399883899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:02,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:02,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:02,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50930557] [2022-01-18 16:26:02,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:02,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:02,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:02,478 INFO L87 Difference]: Start difference. First operand 4613 states and 13812 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:05,648 INFO L93 Difference]: Finished difference Result 10726 states and 31501 transitions. [2022-01-18 16:26:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:26:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:05,666 INFO L225 Difference]: With dead ends: 10726 [2022-01-18 16:26:05,666 INFO L226 Difference]: Without dead ends: 10505 [2022-01-18 16:26:05,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=843, Invalid=7713, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:26:05,667 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 608 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:05,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 1691 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:26:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10505 states. [2022-01-18 16:26:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10505 to 4617. [2022-01-18 16:26:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.994584055459272) internal successors, (13823), 4616 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13823 transitions. [2022-01-18 16:26:05,777 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13823 transitions. Word has length 42 [2022-01-18 16:26:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:05,777 INFO L470 AbstractCegarLoop]: Abstraction has 4617 states and 13823 transitions. [2022-01-18 16:26:05,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13823 transitions. [2022-01-18 16:26:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:05,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:05,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:05,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:05,983 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash 631169890, now seen corresponding path program 98 times [2022-01-18 16:26:05,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:05,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210313287] [2022-01-18 16:26:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:05,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:06,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210313287] [2022-01-18 16:26:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210313287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902117046] [2022-01-18 16:26:06,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:06,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:06,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:06,230 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:06,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 16:26:06,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:06,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:06,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:06,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:06,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:06,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:06,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:06,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:07,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:07,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902117046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:07,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:07,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:07,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594732905] [2022-01-18 16:26:07,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:07,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:07,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:07,143 INFO L87 Difference]: Start difference. First operand 4617 states and 13823 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:10,900 INFO L93 Difference]: Finished difference Result 11258 states and 33127 transitions. [2022-01-18 16:26:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:26:10,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:10,919 INFO L225 Difference]: With dead ends: 11258 [2022-01-18 16:26:10,920 INFO L226 Difference]: Without dead ends: 11072 [2022-01-18 16:26:10,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2961 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1045, Invalid=8657, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:26:10,921 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 736 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 3577 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 3681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:10,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 2420 Invalid, 3681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3577 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:26:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-01-18 16:26:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 4586. [2022-01-18 16:26:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.99062159214831) internal successors, (13712), 4585 states have internal predecessors, (13712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13712 transitions. [2022-01-18 16:26:11,016 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13712 transitions. Word has length 42 [2022-01-18 16:26:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:11,016 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 13712 transitions. [2022-01-18 16:26:11,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13712 transitions. [2022-01-18 16:26:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:11,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:11,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:11,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:11,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 16:26:11,222 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2130134664, now seen corresponding path program 99 times [2022-01-18 16:26:11,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:11,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300768790] [2022-01-18 16:26:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:11,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:11,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300768790] [2022-01-18 16:26:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300768790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879063830] [2022-01-18 16:26:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:11,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:11,492 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:11,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 16:26:11,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:26:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:26:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:11,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:11,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:12,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:12,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:12,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:12,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879063830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:12,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:12,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:12,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237792642] [2022-01-18 16:26:12,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:12,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:12,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:12,430 INFO L87 Difference]: Start difference. First operand 4586 states and 13712 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:13,673 INFO L93 Difference]: Finished difference Result 6115 states and 18066 transitions. [2022-01-18 16:26:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:26:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:13,683 INFO L225 Difference]: With dead ends: 6115 [2022-01-18 16:26:13,683 INFO L226 Difference]: Without dead ends: 5894 [2022-01-18 16:26:13,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=2774, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:26:13,684 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 297 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:13,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1672 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:26:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5894 states. [2022-01-18 16:26:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5894 to 4574. [2022-01-18 16:26:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 2.992127706101028) internal successors, (13683), 4573 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 13683 transitions. [2022-01-18 16:26:13,773 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 13683 transitions. Word has length 42 [2022-01-18 16:26:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:13,773 INFO L470 AbstractCegarLoop]: Abstraction has 4574 states and 13683 transitions. [2022-01-18 16:26:13,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 13683 transitions. [2022-01-18 16:26:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:13,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:13,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:13,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:13,995 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2121237582, now seen corresponding path program 100 times [2022-01-18 16:26:13,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320184063] [2022-01-18 16:26:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:13,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:14,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320184063] [2022-01-18 16:26:14,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320184063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72106215] [2022-01-18 16:26:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:14,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:14,215 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:14,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 16:26:14,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:14,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:14,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:14,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:14,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:15,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:15,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72106215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:15,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:15,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:15,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699240874] [2022-01-18 16:26:15,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:15,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:15,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:15,126 INFO L87 Difference]: Start difference. First operand 4574 states and 13683 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:17,209 INFO L93 Difference]: Finished difference Result 9158 states and 26995 transitions. [2022-01-18 16:26:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:26:17,209 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:17,223 INFO L225 Difference]: With dead ends: 9158 [2022-01-18 16:26:17,224 INFO L226 Difference]: Without dead ends: 8937 [2022-01-18 16:26:17,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=4633, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:26:17,224 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 384 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:17,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 2036 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:26:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2022-01-18 16:26:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 4586. [2022-01-18 16:26:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994111232279171) internal successors, (13728), 4585 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13728 transitions. [2022-01-18 16:26:17,305 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13728 transitions. Word has length 42 [2022-01-18 16:26:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:17,305 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 13728 transitions. [2022-01-18 16:26:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13728 transitions. [2022-01-18 16:26:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:17,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:17,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:17,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 16:26:17,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:17,511 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1414656618, now seen corresponding path program 101 times [2022-01-18 16:26:17,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157207552] [2022-01-18 16:26:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:17,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:17,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157207552] [2022-01-18 16:26:17,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157207552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202932406] [2022-01-18 16:26:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:17,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:17,788 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:17,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 16:26:17,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:17,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:18,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:18,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:18,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:18,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:18,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:18,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202932406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:18,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:18,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:18,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991298475] [2022-01-18 16:26:18,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:18,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:18,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:18,771 INFO L87 Difference]: Start difference. First operand 4586 states and 13728 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:21,238 INFO L93 Difference]: Finished difference Result 9546 states and 28274 transitions. [2022-01-18 16:26:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:26:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:21,254 INFO L225 Difference]: With dead ends: 9546 [2022-01-18 16:26:21,254 INFO L226 Difference]: Without dead ends: 9325 [2022-01-18 16:26:21,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=631, Invalid=5689, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:26:21,255 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 489 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:21,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1957 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:26:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2022-01-18 16:26:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 4590. [2022-01-18 16:26:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 2.9938984528219654) internal successors, (13739), 4589 states have internal predecessors, (13739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 13739 transitions. [2022-01-18 16:26:21,359 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 13739 transitions. Word has length 42 [2022-01-18 16:26:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:21,359 INFO L470 AbstractCegarLoop]: Abstraction has 4590 states and 13739 transitions. [2022-01-18 16:26:21,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 13739 transitions. [2022-01-18 16:26:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:21,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:21,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:21,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:21,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-01-18 16:26:21,565 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2023232046, now seen corresponding path program 102 times [2022-01-18 16:26:21,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:21,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056249103] [2022-01-18 16:26:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:21,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:21,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056249103] [2022-01-18 16:26:21,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056249103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445867580] [2022-01-18 16:26:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:21,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:21,790 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:21,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 16:26:21,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:26:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:21,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:22,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:22,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:22,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:22,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:22,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:22,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:22,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445867580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:22,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:22,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:22,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260749154] [2022-01-18 16:26:22,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:22,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:22,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:22,788 INFO L87 Difference]: Start difference. First operand 4590 states and 13739 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:25,503 INFO L93 Difference]: Finished difference Result 9907 states and 29395 transitions. [2022-01-18 16:26:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:26:25,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:25,522 INFO L225 Difference]: With dead ends: 9907 [2022-01-18 16:26:25,522 INFO L226 Difference]: Without dead ends: 9721 [2022-01-18 16:26:25,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=825, Invalid=6831, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:26:25,523 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 613 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:25,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 1765 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:26:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2022-01-18 16:26:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 4571. [2022-01-18 16:26:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2022-01-18 16:26:25,612 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2022-01-18 16:26:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:25,612 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2022-01-18 16:26:25,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2022-01-18 16:26:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:25,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:25,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:25,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:25,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:25,835 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1347797976, now seen corresponding path program 103 times [2022-01-18 16:26:25,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402989927] [2022-01-18 16:26:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:25,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:26,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402989927] [2022-01-18 16:26:26,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402989927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438379342] [2022-01-18 16:26:26,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:26,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:26,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:26,063 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:26,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:26:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:26,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:26,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:26,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:26,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:26,802 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 22 treesize of output 24 [2022-01-18 16:26:26,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:26,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:26,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438379342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:26,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:26,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:26,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146126178] [2022-01-18 16:26:26,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:26,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:26,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:26,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:26,997 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:28,217 INFO L93 Difference]: Finished difference Result 7685 states and 22870 transitions. [2022-01-18 16:26:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:26:28,217 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:28,230 INFO L225 Difference]: With dead ends: 7685 [2022-01-18 16:26:28,230 INFO L226 Difference]: Without dead ends: 7464 [2022-01-18 16:26:28,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=2942, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:26:28,230 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 318 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:28,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1383 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:26:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2022-01-18 16:26:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 4575. [2022-01-18 16:26:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4574 states have (on average 2.991473546130302) internal successors, (13683), 4574 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 13683 transitions. [2022-01-18 16:26:28,310 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 13683 transitions. Word has length 42 [2022-01-18 16:26:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 4575 states and 13683 transitions. [2022-01-18 16:26:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 13683 transitions. [2022-01-18 16:26:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:28,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:28,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:28,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:28,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:28,516 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1956373404, now seen corresponding path program 104 times [2022-01-18 16:26:28,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8651481] [2022-01-18 16:26:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:28,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:28,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8651481] [2022-01-18 16:26:28,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8651481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20571656] [2022-01-18 16:26:28,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:28,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:28,737 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:28,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:26:28,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:28,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:28,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:28,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:28,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:29,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:29,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:29,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:29,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:29,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20571656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:29,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:29,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:29,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229444322] [2022-01-18 16:26:29,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:29,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:29,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:29,648 INFO L87 Difference]: Start difference. First operand 4575 states and 13683 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:31,054 INFO L93 Difference]: Finished difference Result 7615 states and 22684 transitions. [2022-01-18 16:26:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:26:31,054 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:31,067 INFO L225 Difference]: With dead ends: 7615 [2022-01-18 16:26:31,067 INFO L226 Difference]: Without dead ends: 7429 [2022-01-18 16:26:31,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=3561, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:26:31,068 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 368 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:31,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 1281 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:26:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2022-01-18 16:26:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 4571. [2022-01-18 16:26:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2022-01-18 16:26:31,141 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2022-01-18 16:26:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:31,141 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2022-01-18 16:26:31,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2022-01-18 16:26:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:31,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:31,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:31,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:31,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:31,347 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash -858436710, now seen corresponding path program 105 times [2022-01-18 16:26:31,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:31,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231344288] [2022-01-18 16:26:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:31,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:31,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231344288] [2022-01-18 16:26:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231344288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122274415] [2022-01-18 16:26:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:31,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:31,570 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:31,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:26:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:26:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:26:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:31,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:31,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:32,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:32,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:32,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:32,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:32,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122274415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:32,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771692609] [2022-01-18 16:26:32,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:32,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:32,484 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:33,820 INFO L93 Difference]: Finished difference Result 7633 states and 22749 transitions. [2022-01-18 16:26:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:26:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:33,833 INFO L225 Difference]: With dead ends: 7633 [2022-01-18 16:26:33,833 INFO L226 Difference]: Without dead ends: 7447 [2022-01-18 16:26:33,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:26:33,834 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 281 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:33,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1489 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:26:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2022-01-18 16:26:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 4559. [2022-01-18 16:26:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.9923211935059237) internal successors, (13639), 4558 states have internal predecessors, (13639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 13639 transitions. [2022-01-18 16:26:33,910 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 13639 transitions. Word has length 42 [2022-01-18 16:26:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 4559 states and 13639 transitions. [2022-01-18 16:26:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 13639 transitions. [2022-01-18 16:26:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:33,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:33,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:33,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:34,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 16:26:34,117 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 980367678, now seen corresponding path program 106 times [2022-01-18 16:26:34,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843773806] [2022-01-18 16:26:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:34,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:34,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843773806] [2022-01-18 16:26:34,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843773806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978736980] [2022-01-18 16:26:34,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:34,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:34,340 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 16:26:34,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:34,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:34,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:34,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:35,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:35,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:35,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:35,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:35,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978736980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:35,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:35,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:35,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019182298] [2022-01-18 16:26:35,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:35,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:35,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:35,263 INFO L87 Difference]: Start difference. First operand 4559 states and 13639 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:36,934 INFO L93 Difference]: Finished difference Result 7609 states and 22522 transitions. [2022-01-18 16:26:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:26:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:36,946 INFO L225 Difference]: With dead ends: 7609 [2022-01-18 16:26:36,947 INFO L226 Difference]: Without dead ends: 7388 [2022-01-18 16:26:36,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=368, Invalid=3414, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:26:36,947 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 350 mSDsluCounter, 2532 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:36,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 2009 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:26:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-01-18 16:26:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 4502. [2022-01-18 16:26:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.9962230615418797) internal successors, (13486), 4501 states have internal predecessors, (13486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 13486 transitions. [2022-01-18 16:26:37,020 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 13486 transitions. Word has length 42 [2022-01-18 16:26:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:37,020 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 13486 transitions. [2022-01-18 16:26:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 13486 transitions. [2022-01-18 16:26:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:37,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:37,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:37,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:37,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 16:26:37,226 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash 273786714, now seen corresponding path program 107 times [2022-01-18 16:26:37,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:37,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237582341] [2022-01-18 16:26:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:37,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:37,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:37,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237582341] [2022-01-18 16:26:37,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237582341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:37,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439715909] [2022-01-18 16:26:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:37,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:37,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:37,446 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:37,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 16:26:37,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:37,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:37,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:37,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:38,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:38,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:38,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:38,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:38,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439715909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:38,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:38,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:38,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833867652] [2022-01-18 16:26:38,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:38,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:38,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:38,373 INFO L87 Difference]: Start difference. First operand 4502 states and 13486 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:40,249 INFO L93 Difference]: Finished difference Result 8244 states and 24339 transitions. [2022-01-18 16:26:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:26:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:40,263 INFO L225 Difference]: With dead ends: 8244 [2022-01-18 16:26:40,263 INFO L226 Difference]: Without dead ends: 8023 [2022-01-18 16:26:40,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:26:40,264 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 452 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:40,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1491 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:26:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2022-01-18 16:26:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 4474. [2022-01-18 16:26:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.9973172367538563) internal successors, (13407), 4473 states have internal predecessors, (13407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 13407 transitions. [2022-01-18 16:26:40,342 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 13407 transitions. Word has length 42 [2022-01-18 16:26:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:40,342 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 13407 transitions. [2022-01-18 16:26:40,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 13407 transitions. [2022-01-18 16:26:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:26:40,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:40,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:40,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 16:26:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 16:26:40,548 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 882362142, now seen corresponding path program 108 times [2022-01-18 16:26:40,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147876674] [2022-01-18 16:26:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:40,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:40,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:40,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147876674] [2022-01-18 16:26:40,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147876674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:40,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298685675] [2022-01-18 16:26:40,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:40,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:40,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:40,791 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:40,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 16:26:40,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:26:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:26:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:40,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:41,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:41,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:41,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:41,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:26:41,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:41,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:26:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:41,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298685675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:41,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:41,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 16:26:41,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109910227] [2022-01-18 16:26:41,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:41,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:26:41,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:26:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:26:41,739 INFO L87 Difference]: Start difference. First operand 4474 states and 13407 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:44,126 INFO L93 Difference]: Finished difference Result 8513 states and 25236 transitions. [2022-01-18 16:26:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:26:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:26:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:44,138 INFO L225 Difference]: With dead ends: 8513 [2022-01-18 16:26:44,139 INFO L226 Difference]: Without dead ends: 8327 [2022-01-18 16:26:44,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=712, Invalid=5930, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:26:44,139 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 519 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:44,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1969 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:26:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2022-01-18 16:26:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 4343. [2022-01-18 16:26:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4342 states have (on average 3.00322432058959) internal successors, (13040), 4342 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 13040 transitions. [2022-01-18 16:26:44,208 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 13040 transitions. Word has length 42 [2022-01-18 16:26:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:44,208 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 13040 transitions. [2022-01-18 16:26:44,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 13040 transitions. [2022-01-18 16:26:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 16:26:44,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:44,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:44,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:44,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 16:26:44,414 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1652794775, now seen corresponding path program 109 times [2022-01-18 16:26:44,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:44,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909116111] [2022-01-18 16:26:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909116111] [2022-01-18 16:26:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909116111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677270922] [2022-01-18 16:26:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:44,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:44,520 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:44,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 16:26:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:26:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:44,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:44,733 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:26:44,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 16:26:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677270922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:44,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:44,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 16:26:44,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97154142] [2022-01-18 16:26:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:26:44,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:26:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:26:44,749 INFO L87 Difference]: Start difference. First operand 4343 states and 13040 transitions. Second operand has 16 states, 16 states have (on average 7.0) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:45,016 INFO L93 Difference]: Finished difference Result 7531 states and 22218 transitions. [2022-01-18 16:26:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:26:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 16:26:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:45,028 INFO L225 Difference]: With dead ends: 7531 [2022-01-18 16:26:45,028 INFO L226 Difference]: Without dead ends: 7531 [2022-01-18 16:26:45,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:26:45,029 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 354 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:45,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 609 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7531 states. [2022-01-18 16:26:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7531 to 7155. [2022-01-18 16:26:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 2.973161867486721) internal successors, (21270), 7154 states have internal predecessors, (21270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21270 transitions. [2022-01-18 16:26:45,142 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21270 transitions. Word has length 45 [2022-01-18 16:26:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:45,142 INFO L470 AbstractCegarLoop]: Abstraction has 7155 states and 21270 transitions. [2022-01-18 16:26:45,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21270 transitions. [2022-01-18 16:26:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-18 16:26:45,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:45,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:45,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:45,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:45,352 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 776466167, now seen corresponding path program 110 times [2022-01-18 16:26:45,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:45,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537235940] [2022-01-18 16:26:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:45,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:45,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:45,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537235940] [2022-01-18 16:26:45,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537235940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793359874] [2022-01-18 16:26:45,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:45,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:45,396 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:45,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 16:26:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:26:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:26:45,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:26:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793359874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:45,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:45,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:26:45,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640920600] [2022-01-18 16:26:45,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:45,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:26:45,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:26:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:45,551 INFO L87 Difference]: Start difference. First operand 7155 states and 21270 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:45,617 INFO L93 Difference]: Finished difference Result 13442 states and 39658 transitions. [2022-01-18 16:26:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:26:45,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-01-18 16:26:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:45,641 INFO L225 Difference]: With dead ends: 13442 [2022-01-18 16:26:45,641 INFO L226 Difference]: Without dead ends: 13123 [2022-01-18 16:26:45,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:45,642 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:45,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 90 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:26:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13123 states. [2022-01-18 16:26:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13123 to 9465. [2022-01-18 16:26:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9465 states, 9464 states have (on average 2.9990490278951816) internal successors, (28383), 9464 states have internal predecessors, (28383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9465 states to 9465 states and 28383 transitions. [2022-01-18 16:26:45,794 INFO L78 Accepts]: Start accepts. Automaton has 9465 states and 28383 transitions. Word has length 46 [2022-01-18 16:26:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:45,794 INFO L470 AbstractCegarLoop]: Abstraction has 9465 states and 28383 transitions. [2022-01-18 16:26:45,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9465 states and 28383 transitions. [2022-01-18 16:26:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:45,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:45,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:45,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:46,008 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 293231441, now seen corresponding path program 111 times [2022-01-18 16:26:46,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:46,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872959413] [2022-01-18 16:26:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:46,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:46,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:46,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872959413] [2022-01-18 16:26:46,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872959413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:46,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851028657] [2022-01-18 16:26:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:46,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:46,080 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:46,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 16:26:46,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:26:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:26:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:46,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:46,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:46,328 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:46,328 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 17 [2022-01-18 16:26:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851028657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:46,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:46,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 16:26:46,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134547800] [2022-01-18 16:26:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:46,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:26:46,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:26:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:26:46,382 INFO L87 Difference]: Start difference. First operand 9465 states and 28383 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:47,007 INFO L93 Difference]: Finished difference Result 19180 states and 56764 transitions. [2022-01-18 16:26:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:26:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 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 50 [2022-01-18 16:26:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:47,040 INFO L225 Difference]: With dead ends: 19180 [2022-01-18 16:26:47,040 INFO L226 Difference]: Without dead ends: 18988 [2022-01-18 16:26:47,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:26:47,040 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 256 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:47,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1017 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 772 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-01-18 16:26:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2022-01-18 16:26:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 11509. [2022-01-18 16:26:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11509 states, 11508 states have (on average 3.016510253736531) internal successors, (34714), 11508 states have internal predecessors, (34714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11509 states to 11509 states and 34714 transitions. [2022-01-18 16:26:47,250 INFO L78 Accepts]: Start accepts. Automaton has 11509 states and 34714 transitions. Word has length 50 [2022-01-18 16:26:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:47,250 INFO L470 AbstractCegarLoop]: Abstraction has 11509 states and 34714 transitions. [2022-01-18 16:26:47,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11509 states and 34714 transitions. [2022-01-18 16:26:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:47,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:47,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:47,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:47,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 16:26:47,465 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -608727279, now seen corresponding path program 112 times [2022-01-18 16:26:47,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:47,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224474293] [2022-01-18 16:26:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:47,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:47,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224474293] [2022-01-18 16:26:47,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224474293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633875037] [2022-01-18 16:26:47,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:47,529 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:47,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 16:26:47,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:47,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:47,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:26:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:47,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:47,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:47,759 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:47,759 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 17 [2022-01-18 16:26:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:47,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633875037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:47,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:47,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 16:26:47,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640893388] [2022-01-18 16:26:47,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:47,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:26:47,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:47,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:26:47,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:26:47,813 INFO L87 Difference]: Start difference. First operand 11509 states and 34714 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:48,939 INFO L93 Difference]: Finished difference Result 29618 states and 87433 transitions. [2022-01-18 16:26:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:26:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 50 [2022-01-18 16:26:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:48,997 INFO L225 Difference]: With dead ends: 29618 [2022-01-18 16:26:48,997 INFO L226 Difference]: Without dead ends: 29554 [2022-01-18 16:26:48,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:26:48,998 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 414 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:48,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 1051 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:26:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29554 states. [2022-01-18 16:26:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29554 to 11548. [2022-01-18 16:26:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11548 states, 11547 states have (on average 3.017753529055166) internal successors, (34846), 11547 states have internal predecessors, (34846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11548 states to 11548 states and 34846 transitions. [2022-01-18 16:26:49,285 INFO L78 Accepts]: Start accepts. Automaton has 11548 states and 34846 transitions. Word has length 50 [2022-01-18 16:26:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:49,285 INFO L470 AbstractCegarLoop]: Abstraction has 11548 states and 34846 transitions. [2022-01-18 16:26:49,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 11548 states and 34846 transitions. [2022-01-18 16:26:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:49,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:49,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:49,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 16:26:49,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:49,500 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1978557525, now seen corresponding path program 113 times [2022-01-18 16:26:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153156553] [2022-01-18 16:26:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:49,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:49,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153156553] [2022-01-18 16:26:49,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153156553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193435777] [2022-01-18 16:26:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:49,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:49,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:49,564 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:49,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 16:26:49,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:26:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:49,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:26:49,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:49,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-18 16:26:49,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:49,694 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 11 treesize of output 7 [2022-01-18 16:26:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:49,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:49,925 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:49,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-01-18 16:26:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:26:50,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193435777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:50,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:50,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 16 [2022-01-18 16:26:50,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455435867] [2022-01-18 16:26:50,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:50,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 16:26:50,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 16:26:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 16:26:50,005 INFO L87 Difference]: Start difference. First operand 11548 states and 34846 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 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) [2022-01-18 16:26:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:50,720 INFO L93 Difference]: Finished difference Result 21631 states and 63224 transitions. [2022-01-18 16:26:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:26:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 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 50 [2022-01-18 16:26:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:50,759 INFO L225 Difference]: With dead ends: 21631 [2022-01-18 16:26:50,759 INFO L226 Difference]: Without dead ends: 21631 [2022-01-18 16:26:50,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:26:50,760 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 401 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:50,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 966 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 742 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-01-18 16:26:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21631 states. [2022-01-18 16:26:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21631 to 13523. [2022-01-18 16:26:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13522 states have (on average 3.0329832864960804) internal successors, (41012), 13522 states have internal predecessors, (41012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 41012 transitions. [2022-01-18 16:26:51,033 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 41012 transitions. Word has length 50 [2022-01-18 16:26:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:51,033 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 41012 transitions. [2022-01-18 16:26:51,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 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) [2022-01-18 16:26:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 41012 transitions. [2022-01-18 16:26:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:51,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:51,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:51,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:51,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:51,254 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:51,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1092957487, now seen corresponding path program 114 times [2022-01-18 16:26:51,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831149548] [2022-01-18 16:26:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:51,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:51,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831149548] [2022-01-18 16:26:51,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831149548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224403484] [2022-01-18 16:26:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:51,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:51,370 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:51,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 16:26:51,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:26:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:26:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:51,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:51,644 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:51,644 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 17 [2022-01-18 16:26:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224403484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:51,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 16:26:51,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248049168] [2022-01-18 16:26:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:51,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:26:51,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:26:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:26:51,698 INFO L87 Difference]: Start difference. First operand 13523 states and 41012 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:52,371 INFO L93 Difference]: Finished difference Result 21963 states and 64672 transitions. [2022-01-18 16:26:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 16:26:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 50 [2022-01-18 16:26:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:52,413 INFO L225 Difference]: With dead ends: 21963 [2022-01-18 16:26:52,413 INFO L226 Difference]: Without dead ends: 21963 [2022-01-18 16:26:52,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:26:52,414 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 647 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:52,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 598 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:26:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21963 states. [2022-01-18 16:26:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21963 to 11528. [2022-01-18 16:26:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11528 states, 11527 states have (on average 3.017784332436887) internal successors, (34786), 11527 states have internal predecessors, (34786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11528 states to 11528 states and 34786 transitions. [2022-01-18 16:26:52,795 INFO L78 Accepts]: Start accepts. Automaton has 11528 states and 34786 transitions. Word has length 50 [2022-01-18 16:26:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:52,795 INFO L470 AbstractCegarLoop]: Abstraction has 11528 states and 34786 transitions. [2022-01-18 16:26:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 11528 states and 34786 transitions. [2022-01-18 16:26:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:52,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:52,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:52,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:53,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-01-18 16:26:53,012 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1449163123, now seen corresponding path program 115 times [2022-01-18 16:26:53,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:53,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541690484] [2022-01-18 16:26:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:53,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:53,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541690484] [2022-01-18 16:26:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541690484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145278683] [2022-01-18 16:26:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:53,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:53,079 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:53,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 16:26:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:26:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:53,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:53,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:53,311 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:53,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-01-18 16:26:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:53,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145278683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:53,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:53,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 16:26:53,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797220205] [2022-01-18 16:26:53,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:53,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:26:53,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:26:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:26:53,369 INFO L87 Difference]: Start difference. First operand 11528 states and 34786 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:54,309 INFO L93 Difference]: Finished difference Result 25459 states and 74801 transitions. [2022-01-18 16:26:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:26:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 50 [2022-01-18 16:26:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:54,359 INFO L225 Difference]: With dead ends: 25459 [2022-01-18 16:26:54,360 INFO L226 Difference]: Without dead ends: 25395 [2022-01-18 16:26:54,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:26:54,360 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 515 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:54,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 722 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:26:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25395 states. [2022-01-18 16:26:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25395 to 11645. [2022-01-18 16:26:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11645 states, 11644 states have (on average 3.020267949158365) internal successors, (35168), 11644 states have internal predecessors, (35168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11645 states to 11645 states and 35168 transitions. [2022-01-18 16:26:54,624 INFO L78 Accepts]: Start accepts. Automaton has 11645 states and 35168 transitions. Word has length 50 [2022-01-18 16:26:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:54,624 INFO L470 AbstractCegarLoop]: Abstraction has 11645 states and 35168 transitions. [2022-01-18 16:26:54,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11645 states and 35168 transitions. [2022-01-18 16:26:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:54,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:54,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:54,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:54,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 16:26:54,839 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -258519369, now seen corresponding path program 116 times [2022-01-18 16:26:54,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703648986] [2022-01-18 16:26:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:54,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:26:54,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703648986] [2022-01-18 16:26:54,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703648986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731569817] [2022-01-18 16:26:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:54,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:54,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:54,940 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:54,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 16:26:54,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:54,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:26:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:55,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:26:55,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:26:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:55,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:55,214 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 17 [2022-01-18 16:26:55,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:55,355 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 19 treesize of output 23 [2022-01-18 16:26:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731569817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:55,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:55,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 16:26:55,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626582282] [2022-01-18 16:26:55,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:55,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:26:55,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:26:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:26:55,387 INFO L87 Difference]: Start difference. First operand 11645 states and 35168 transitions. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:56,681 INFO L93 Difference]: Finished difference Result 25524 states and 75351 transitions. [2022-01-18 16:26:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:26:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:26:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:56,730 INFO L225 Difference]: With dead ends: 25524 [2022-01-18 16:26:56,730 INFO L226 Difference]: Without dead ends: 25524 [2022-01-18 16:26:56,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=776, Invalid=6030, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:26:56,731 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1144 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:56,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 1643 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:26:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25524 states. [2022-01-18 16:26:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25524 to 13640. [2022-01-18 16:26:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13639 states have (on average 3.017230002199575) internal successors, (41152), 13639 states have internal predecessors, (41152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 41152 transitions. [2022-01-18 16:26:57,115 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 41152 transitions. Word has length 50 [2022-01-18 16:26:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:57,115 INFO L470 AbstractCegarLoop]: Abstraction has 13640 states and 41152 transitions. [2022-01-18 16:26:57,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 41152 transitions. [2022-01-18 16:26:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:57,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:57,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:57,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:57,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 16:26:57,334 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -979722479, now seen corresponding path program 117 times [2022-01-18 16:26:57,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:57,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462546748] [2022-01-18 16:26:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:57,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:26:57,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462546748] [2022-01-18 16:26:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462546748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103959560] [2022-01-18 16:26:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:57,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:57,463 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:57,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 16:26:57,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:26:57,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:57,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:26:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:57,609 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 11 treesize of output 7 [2022-01-18 16:26:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:26:57,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:57,814 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:57,814 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 12 treesize of output 11 [2022-01-18 16:26:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:26:57,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103959560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:57,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:57,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-18 16:26:57,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563645050] [2022-01-18 16:26:57,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:57,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:26:57,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:26:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:26:57,854 INFO L87 Difference]: Start difference. First operand 13640 states and 41152 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:59,481 INFO L93 Difference]: Finished difference Result 28722 states and 83889 transitions. [2022-01-18 16:26:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 16:26:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:26:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:59,556 INFO L225 Difference]: With dead ends: 28722 [2022-01-18 16:26:59,556 INFO L226 Difference]: Without dead ends: 28338 [2022-01-18 16:26:59,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=887, Invalid=6253, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:26:59,557 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 737 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 958 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:59,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2363 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1182 Invalid, 0 Unknown, 958 Unchecked, 0.4s Time] [2022-01-18 16:26:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28338 states. [2022-01-18 16:26:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28338 to 16155. [2022-01-18 16:26:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16155 states, 16154 states have (on average 3.0315711278940203) internal successors, (48972), 16154 states have internal predecessors, (48972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16155 states to 16155 states and 48972 transitions. [2022-01-18 16:26:59,971 INFO L78 Accepts]: Start accepts. Automaton has 16155 states and 48972 transitions. Word has length 50 [2022-01-18 16:26:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:59,971 INFO L470 AbstractCegarLoop]: Abstraction has 16155 states and 48972 transitions. [2022-01-18 16:26:59,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 16155 states and 48972 transitions. [2022-01-18 16:26:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:26:59,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:59,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:00,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:00,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 16:27:00,193 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -970250731, now seen corresponding path program 118 times [2022-01-18 16:27:00,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:00,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828155592] [2022-01-18 16:27:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:00,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:27:00,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:00,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828155592] [2022-01-18 16:27:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828155592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:00,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816452292] [2022-01-18 16:27:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:00,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:00,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:00,336 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:00,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 16:27:00,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:27:00,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:00,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:00,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:00,634 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:00,635 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 14 treesize of output 13 [2022-01-18 16:27:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:00,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816452292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:00,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:00,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-18 16:27:00,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796026354] [2022-01-18 16:27:00,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:00,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:27:00,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:27:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:27:00,683 INFO L87 Difference]: Start difference. First operand 16155 states and 48972 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:03,987 INFO L93 Difference]: Finished difference Result 44253 states and 131188 transitions. [2022-01-18 16:27:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-18 16:27:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:04,082 INFO L225 Difference]: With dead ends: 44253 [2022-01-18 16:27:04,082 INFO L226 Difference]: Without dead ends: 44061 [2022-01-18 16:27:04,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6551 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1545, Invalid=17915, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:27:04,084 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 2263 mSDsluCounter, 3924 mSDsCounter, 0 mSdLazyCounter, 3251 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2263 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 3251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:04,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2263 Valid, 2914 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 3251 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:27:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44061 states. [2022-01-18 16:27:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44061 to 20860. [2022-01-18 16:27:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20860 states, 20859 states have (on average 3.0432906658996117) internal successors, (63480), 20859 states have internal predecessors, (63480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20860 states to 20860 states and 63480 transitions. [2022-01-18 16:27:04,721 INFO L78 Accepts]: Start accepts. Automaton has 20860 states and 63480 transitions. Word has length 50 [2022-01-18 16:27:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:04,722 INFO L470 AbstractCegarLoop]: Abstraction has 20860 states and 63480 transitions. [2022-01-18 16:27:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20860 states and 63480 transitions. [2022-01-18 16:27:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:04,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:04,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:04,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 16:27:04,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:04,951 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash 826840221, now seen corresponding path program 119 times [2022-01-18 16:27:04,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:04,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968089010] [2022-01-18 16:27:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:04,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:05,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968089010] [2022-01-18 16:27:05,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968089010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218550364] [2022-01-18 16:27:05,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:05,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:05,072 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:05,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 16:27:05,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:27:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:27:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:05,262 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 11 treesize of output 7 [2022-01-18 16:27:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:05,518 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:27:05,518 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 12 treesize of output 11 [2022-01-18 16:27:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:05,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218550364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:05,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:05,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 16:27:05,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851469362] [2022-01-18 16:27:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:27:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:27:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:27:05,565 INFO L87 Difference]: Start difference. First operand 20860 states and 63480 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:08,074 INFO L93 Difference]: Finished difference Result 46764 states and 138239 transitions. [2022-01-18 16:27:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 16:27:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:08,463 INFO L225 Difference]: With dead ends: 46764 [2022-01-18 16:27:08,463 INFO L226 Difference]: Without dead ends: 46636 [2022-01-18 16:27:08,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1423, Invalid=10567, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 16:27:08,464 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 803 mSDsluCounter, 3749 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:08,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2949 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1625 Invalid, 0 Unknown, 668 Unchecked, 0.6s Time] [2022-01-18 16:27:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46636 states. [2022-01-18 16:27:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46636 to 26962. [2022-01-18 16:27:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26962 states, 26961 states have (on average 3.065242387151812) internal successors, (82642), 26961 states have internal predecessors, (82642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26962 states to 26962 states and 82642 transitions. [2022-01-18 16:27:09,206 INFO L78 Accepts]: Start accepts. Automaton has 26962 states and 82642 transitions. Word has length 50 [2022-01-18 16:27:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:09,206 INFO L470 AbstractCegarLoop]: Abstraction has 26962 states and 82642 transitions. [2022-01-18 16:27:09,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26962 states and 82642 transitions. [2022-01-18 16:27:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:09,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:09,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:09,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:09,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:09,490 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1809744911, now seen corresponding path program 120 times [2022-01-18 16:27:09,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:09,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360105908] [2022-01-18 16:27:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:09,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:09,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360105908] [2022-01-18 16:27:09,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360105908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932821181] [2022-01-18 16:27:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:27:09,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:09,645 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:09,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 16:27:09,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:27:09,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:09,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:27:09,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:09,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:10,100 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:10,101 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 14 treesize of output 13 [2022-01-18 16:27:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:27:10,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932821181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:10,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 16:27:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518595963] [2022-01-18 16:27:10,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:10,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:27:10,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:27:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:27:10,148 INFO L87 Difference]: Start difference. First operand 26962 states and 82642 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:14,165 INFO L93 Difference]: Finished difference Result 56354 states and 167084 transitions. [2022-01-18 16:27:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-18 16:27:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:14,286 INFO L225 Difference]: With dead ends: 56354 [2022-01-18 16:27:14,286 INFO L226 Difference]: Without dead ends: 56290 [2022-01-18 16:27:14,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1895, Invalid=19861, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:27:14,288 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 1648 mSDsluCounter, 5632 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 4972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:14,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 4111 Invalid, 4972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:27:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56290 states. [2022-01-18 16:27:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56290 to 26611. [2022-01-18 16:27:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26611 states, 26610 states have (on average 3.069034197670049) internal successors, (81667), 26610 states have internal predecessors, (81667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26611 states to 26611 states and 81667 transitions. [2022-01-18 16:27:15,116 INFO L78 Accepts]: Start accepts. Automaton has 26611 states and 81667 transitions. Word has length 50 [2022-01-18 16:27:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:15,116 INFO L470 AbstractCegarLoop]: Abstraction has 26611 states and 81667 transitions. [2022-01-18 16:27:15,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 26611 states and 81667 transitions. [2022-01-18 16:27:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:15,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:15,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:15,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:15,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 16:27:15,366 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -870925749, now seen corresponding path program 121 times [2022-01-18 16:27:15,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415774537] [2022-01-18 16:27:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:15,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:27:15,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415774537] [2022-01-18 16:27:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415774537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643223728] [2022-01-18 16:27:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:27:15,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:15,449 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:15,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 16:27:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:27:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:15,568 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 23 treesize of output 17 [2022-01-18 16:27:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:27:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:15,686 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:27:15,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-01-18 16:27:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:27:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643223728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:15,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:15,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 16:27:15,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423046618] [2022-01-18 16:27:15,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:15,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:27:15,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:27:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:27:15,741 INFO L87 Difference]: Start difference. First operand 26611 states and 81667 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:17,124 INFO L93 Difference]: Finished difference Result 53483 states and 160511 transitions. [2022-01-18 16:27:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:27:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:17,294 INFO L225 Difference]: With dead ends: 53483 [2022-01-18 16:27:17,294 INFO L226 Difference]: Without dead ends: 53419 [2022-01-18 16:27:17,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1902, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:27:17,295 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 525 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:17,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 874 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:27:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53419 states. [2022-01-18 16:27:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53419 to 26651. [2022-01-18 16:27:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26651 states, 26650 states have (on average 3.0676547842401503) internal successors, (81753), 26650 states have internal predecessors, (81753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26651 states to 26651 states and 81753 transitions. [2022-01-18 16:27:18,112 INFO L78 Accepts]: Start accepts. Automaton has 26651 states and 81753 transitions. Word has length 50 [2022-01-18 16:27:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 26651 states and 81753 transitions. [2022-01-18 16:27:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 26651 states and 81753 transitions. [2022-01-18 16:27:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:18,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:18,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:18,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 16:27:18,353 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1716359055, now seen corresponding path program 122 times [2022-01-18 16:27:18,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:18,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814869828] [2022-01-18 16:27:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:18,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:27:18,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:18,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814869828] [2022-01-18 16:27:18,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814869828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:18,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680855679] [2022-01-18 16:27:18,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:18,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:18,431 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:18,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 16:27:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:27:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:18,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:27:18,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:18,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:18,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:18,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 16:27:18,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:18,792 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 19 treesize of output 23 [2022-01-18 16:27:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:18,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680855679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:18,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:18,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-01-18 16:27:18,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61981485] [2022-01-18 16:27:18,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:18,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 16:27:18,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 16:27:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:27:18,862 INFO L87 Difference]: Start difference. First operand 26651 states and 81753 transitions. Second operand has 22 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:21,015 INFO L93 Difference]: Finished difference Result 54553 states and 162853 transitions. [2022-01-18 16:27:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 16:27:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:21,299 INFO L225 Difference]: With dead ends: 54553 [2022-01-18 16:27:21,299 INFO L226 Difference]: Without dead ends: 54553 [2022-01-18 16:27:21,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1402, Invalid=9104, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:27:21,300 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 1100 mSDsluCounter, 2462 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:21,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 1907 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:27:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54553 states. [2022-01-18 16:27:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54553 to 23933. [2022-01-18 16:27:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23933 states, 23932 states have (on average 3.0579558749791076) internal successors, (73183), 23932 states have internal predecessors, (73183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23933 states to 23933 states and 73183 transitions. [2022-01-18 16:27:21,894 INFO L78 Accepts]: Start accepts. Automaton has 23933 states and 73183 transitions. Word has length 50 [2022-01-18 16:27:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:21,894 INFO L470 AbstractCegarLoop]: Abstraction has 23933 states and 73183 transitions. [2022-01-18 16:27:21,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 23933 states and 73183 transitions. [2022-01-18 16:27:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:21,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:21,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:21,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 16:27:22,128 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1605781641, now seen corresponding path program 123 times [2022-01-18 16:27:22,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912424543] [2022-01-18 16:27:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:22,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:22,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912424543] [2022-01-18 16:27:22,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912424543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260931019] [2022-01-18 16:27:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:22,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:22,194 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:22,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 16:27:22,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:27:22,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:27:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:22,297 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 5 treesize of output 3 [2022-01-18 16:27:22,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:22,479 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:22,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-01-18 16:27:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:22,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260931019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:22,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:22,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2022-01-18 16:27:22,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832923520] [2022-01-18 16:27:22,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:22,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:27:22,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:27:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:27:22,554 INFO L87 Difference]: Start difference. First operand 23933 states and 73183 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:24,159 INFO L93 Difference]: Finished difference Result 50071 states and 149708 transitions. [2022-01-18 16:27:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 16:27:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:24,269 INFO L225 Difference]: With dead ends: 50071 [2022-01-18 16:27:24,269 INFO L226 Difference]: Without dead ends: 50007 [2022-01-18 16:27:24,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=675, Invalid=3881, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:27:24,270 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 807 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:24,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1297 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:27:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50007 states. [2022-01-18 16:27:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50007 to 24050. [2022-01-18 16:27:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24050 states, 24049 states have (on average 3.0589629506424383) internal successors, (73565), 24049 states have internal predecessors, (73565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24050 states to 24050 states and 73565 transitions. [2022-01-18 16:27:25,127 INFO L78 Accepts]: Start accepts. Automaton has 24050 states and 73565 transitions. Word has length 50 [2022-01-18 16:27:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:25,127 INFO L470 AbstractCegarLoop]: Abstraction has 24050 states and 73565 transitions. [2022-01-18 16:27:25,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24050 states and 73565 transitions. [2022-01-18 16:27:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:25,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:25,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:25,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:25,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:25,360 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash -101900851, now seen corresponding path program 124 times [2022-01-18 16:27:25,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:25,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460236533] [2022-01-18 16:27:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:25,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:25,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460236533] [2022-01-18 16:27:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460236533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283735249] [2022-01-18 16:27:25,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:25,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:25,434 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:25,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 16:27:25,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:27:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:25,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:25,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:25,770 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:25,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2022-01-18 16:27:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:25,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283735249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:25,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:25,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 16:27:25,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495251471] [2022-01-18 16:27:25,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:25,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:27:25,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:27:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:27:25,833 INFO L87 Difference]: Start difference. First operand 24050 states and 73565 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:27,641 INFO L93 Difference]: Finished difference Result 45602 states and 136005 transitions. [2022-01-18 16:27:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:27:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:27,731 INFO L225 Difference]: With dead ends: 45602 [2022-01-18 16:27:27,731 INFO L226 Difference]: Without dead ends: 45602 [2022-01-18 16:27:27,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=883, Invalid=5123, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:27:27,732 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 983 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:27,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1142 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:27:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45602 states. [2022-01-18 16:27:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45602 to 25458. [2022-01-18 16:27:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25458 states, 25457 states have (on average 3.0615940605727303) internal successors, (77939), 25457 states have internal predecessors, (77939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25458 states to 25458 states and 77939 transitions. [2022-01-18 16:27:28,418 INFO L78 Accepts]: Start accepts. Automaton has 25458 states and 77939 transitions. Word has length 50 [2022-01-18 16:27:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 25458 states and 77939 transitions. [2022-01-18 16:27:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25458 states and 77939 transitions. [2022-01-18 16:27:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:28,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:28,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:28,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:28,654 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 486850307, now seen corresponding path program 125 times [2022-01-18 16:27:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:28,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401223817] [2022-01-18 16:27:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:28,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:28,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401223817] [2022-01-18 16:27:28,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401223817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058880950] [2022-01-18 16:27:28,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:28,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:28,726 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 16:27:28,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:27:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:27:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:28,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:28,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:28,991 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 11 treesize of output 7 [2022-01-18 16:27:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:27:29,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:29,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:29,268 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 19 treesize of output 21 [2022-01-18 16:27:29,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:29,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 16:27:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:27:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058880950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:29,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:29,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 16:27:29,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586358299] [2022-01-18 16:27:29,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:29,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:27:29,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:27:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:27:29,588 INFO L87 Difference]: Start difference. First operand 25458 states and 77939 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:34,229 INFO L93 Difference]: Finished difference Result 76282 states and 226927 transitions. [2022-01-18 16:27:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-01-18 16:27:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:34,539 INFO L225 Difference]: With dead ends: 76282 [2022-01-18 16:27:34,539 INFO L226 Difference]: Without dead ends: 76282 [2022-01-18 16:27:34,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 128 SyntacticMatches, 27 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16941 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4061, Invalid=34159, Unknown=0, NotChecked=0, Total=38220 [2022-01-18 16:27:34,540 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1693 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 4144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1736 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:34,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 2902 Invalid, 4144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2290 Invalid, 0 Unknown, 1736 Unchecked, 0.9s Time] [2022-01-18 16:27:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76282 states. [2022-01-18 16:27:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76282 to 36053. [2022-01-18 16:27:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36053 states, 36052 states have (on average 3.0612448685232443) internal successors, (110364), 36052 states have internal predecessors, (110364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36053 states to 36053 states and 110364 transitions. [2022-01-18 16:27:35,522 INFO L78 Accepts]: Start accepts. Automaton has 36053 states and 110364 transitions. Word has length 50 [2022-01-18 16:27:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:35,522 INFO L470 AbstractCegarLoop]: Abstraction has 36053 states and 110364 transitions. [2022-01-18 16:27:35,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 36053 states and 110364 transitions. [2022-01-18 16:27:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:35,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:35,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:35,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-01-18 16:27:35,948 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:35,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1208228365, now seen corresponding path program 126 times [2022-01-18 16:27:35,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:35,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407925896] [2022-01-18 16:27:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:35,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407925896] [2022-01-18 16:27:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407925896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888773847] [2022-01-18 16:27:36,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:27:36,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:36,023 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:36,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 16:27:36,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:27:36,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:27:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:36,178 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 23 treesize of output 17 [2022-01-18 16:27:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:36,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:36,347 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:36,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2022-01-18 16:27:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:36,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888773847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:36,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:36,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 16:27:36,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799534296] [2022-01-18 16:27:36,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:36,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:27:36,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:27:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:27:36,425 INFO L87 Difference]: Start difference. First operand 36053 states and 110364 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:39,087 INFO L93 Difference]: Finished difference Result 87953 states and 265394 transitions. [2022-01-18 16:27:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:27:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:39,328 INFO L225 Difference]: With dead ends: 87953 [2022-01-18 16:27:39,328 INFO L226 Difference]: Without dead ends: 87953 [2022-01-18 16:27:39,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1376, Invalid=8524, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:27:39,329 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 1529 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:39,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1162 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:27:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87953 states. [2022-01-18 16:27:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87953 to 47154. [2022-01-18 16:27:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47154 states, 47153 states have (on average 3.058129917502598) internal successors, (144200), 47153 states have internal predecessors, (144200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47154 states to 47154 states and 144200 transitions. [2022-01-18 16:27:40,701 INFO L78 Accepts]: Start accepts. Automaton has 47154 states and 144200 transitions. Word has length 50 [2022-01-18 16:27:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:40,701 INFO L470 AbstractCegarLoop]: Abstraction has 47154 states and 144200 transitions. [2022-01-18 16:27:40,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 47154 states and 144200 transitions. [2022-01-18 16:27:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:40,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:40,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:41,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:41,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 16:27:41,203 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1392602305, now seen corresponding path program 127 times [2022-01-18 16:27:41,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732917373] [2022-01-18 16:27:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:41,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:41,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:41,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732917373] [2022-01-18 16:27:41,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732917373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2690574] [2022-01-18 16:27:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:27:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:41,266 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:41,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 16:27:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:41,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:27:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:41,405 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 13 [2022-01-18 16:27:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:41,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:41,549 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:27:41,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2022-01-18 16:27:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:41,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2690574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:41,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:41,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 16:27:41,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111169786] [2022-01-18 16:27:41,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:41,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:27:41,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:27:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:27:41,612 INFO L87 Difference]: Start difference. First operand 47154 states and 144200 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:42,933 INFO L93 Difference]: Finished difference Result 73557 states and 222879 transitions. [2022-01-18 16:27:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:27:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:43,343 INFO L225 Difference]: With dead ends: 73557 [2022-01-18 16:27:43,343 INFO L226 Difference]: Without dead ends: 73557 [2022-01-18 16:27:43,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=2409, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:27:43,343 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 764 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:43,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 896 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:27:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73557 states. [2022-01-18 16:27:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73557 to 34174. [2022-01-18 16:27:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34174 states, 34173 states have (on average 3.0693529979808623) internal successors, (104889), 34173 states have internal predecessors, (104889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34174 states to 34174 states and 104889 transitions. [2022-01-18 16:27:44,346 INFO L78 Accepts]: Start accepts. Automaton has 34174 states and 104889 transitions. Word has length 50 [2022-01-18 16:27:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:44,347 INFO L470 AbstractCegarLoop]: Abstraction has 34174 states and 104889 transitions. [2022-01-18 16:27:44,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34174 states and 104889 transitions. [2022-01-18 16:27:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:27:44,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:44,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:44,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:44,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 16:27:44,595 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 628935699, now seen corresponding path program 128 times [2022-01-18 16:27:44,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403019713] [2022-01-18 16:27:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:44,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:44,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:44,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403019713] [2022-01-18 16:27:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403019713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989439711] [2022-01-18 16:27:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:44,673 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:44,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 16:27:44,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:44,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:27:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:44,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:27:44,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:27:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:44,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:44,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:44,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-18 16:27:45,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:45,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:27:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:27:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989439711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:45,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 16:27:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764317019] [2022-01-18 16:27:45,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:45,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 16:27:45,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 16:27:45,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:27:45,189 INFO L87 Difference]: Start difference. First operand 34174 states and 104889 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:47,703 INFO L93 Difference]: Finished difference Result 78501 states and 236629 transitions. [2022-01-18 16:27:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 16:27:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:27:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:48,123 INFO L225 Difference]: With dead ends: 78501 [2022-01-18 16:27:48,123 INFO L226 Difference]: Without dead ends: 78501 [2022-01-18 16:27:48,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=882, Invalid=9420, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:27:48,124 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 961 mSDsluCounter, 3809 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 3532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:48,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 2916 Invalid, 3532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:27:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78501 states. [2022-01-18 16:27:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78501 to 29075. [2022-01-18 16:27:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29075 states, 29074 states have (on average 3.0771479672559674) internal successors, (89465), 29074 states have internal predecessors, (89465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29075 states to 29075 states and 89465 transitions. [2022-01-18 16:27:48,997 INFO L78 Accepts]: Start accepts. Automaton has 29075 states and 89465 transitions. Word has length 50 [2022-01-18 16:27:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:48,997 INFO L470 AbstractCegarLoop]: Abstraction has 29075 states and 89465 transitions. [2022-01-18 16:27:48,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 29075 states and 89465 transitions. [2022-01-18 16:27:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:27:49,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:49,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:49,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:49,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 16:27:49,232 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 150920811, now seen corresponding path program 129 times [2022-01-18 16:27:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633115125] [2022-01-18 16:27:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:49,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:49,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633115125] [2022-01-18 16:27:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633115125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884775170] [2022-01-18 16:27:49,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:49,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:49,257 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:49,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 16:27:49,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:27:49,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:27:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884775170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:49,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:49,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:27:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516828716] [2022-01-18 16:27:49,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:49,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:27:49,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:27:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:27:49,438 INFO L87 Difference]: Start difference. First operand 29075 states and 89465 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:49,685 INFO L93 Difference]: Finished difference Result 64388 states and 199780 transitions. [2022-01-18 16:27:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:27:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:27:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:50,083 INFO L225 Difference]: With dead ends: 64388 [2022-01-18 16:27:50,083 INFO L226 Difference]: Without dead ends: 63562 [2022-01-18 16:27:50,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:27:50,083 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 97 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:50,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:27:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63562 states. [2022-01-18 16:27:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63562 to 56302. [2022-01-18 16:27:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56302 states, 56301 states have (on average 3.156888865206657) internal successors, (177736), 56301 states have internal predecessors, (177736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56302 states to 56302 states and 177736 transitions. [2022-01-18 16:27:51,351 INFO L78 Accepts]: Start accepts. Automaton has 56302 states and 177736 transitions. Word has length 51 [2022-01-18 16:27:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:51,352 INFO L470 AbstractCegarLoop]: Abstraction has 56302 states and 177736 transitions. [2022-01-18 16:27:51,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56302 states and 177736 transitions. [2022-01-18 16:27:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:27:51,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:51,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:51,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 16:27:51,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 16:27:51,626 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash 888430504, now seen corresponding path program 130 times [2022-01-18 16:27:51,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:51,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031016821] [2022-01-18 16:27:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:51,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:27:52,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031016821] [2022-01-18 16:27:52,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031016821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880875888] [2022-01-18 16:27:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:52,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:52,144 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:52,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 16:27:52,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:27:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:53,038 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:27:53,038 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 37 treesize of output 17 [2022-01-18 16:27:53,112 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:53,113 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 33 treesize of output 17 [2022-01-18 16:27:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:27:53,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:53,718 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:53,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:27:54,203 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:54,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:27:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:27:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880875888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:54,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:54,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 50 [2022-01-18 16:27:54,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880756758] [2022-01-18 16:27:54,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:54,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:27:54,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:27:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2358, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:27:54,289 INFO L87 Difference]: Start difference. First operand 56302 states and 177736 transitions. Second operand has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:57,208 INFO L93 Difference]: Finished difference Result 76857 states and 239282 transitions. [2022-01-18 16:27:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:27:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:27:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:57,379 INFO L225 Difference]: With dead ends: 76857 [2022-01-18 16:27:57,379 INFO L226 Difference]: Without dead ends: 76441 [2022-01-18 16:27:57,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=510, Invalid=6462, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:27:57,380 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 600 mSDsluCounter, 3678 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:57,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2962 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3215 Invalid, 0 Unknown, 59 Unchecked, 1.2s Time] [2022-01-18 16:27:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76441 states. [2022-01-18 16:27:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76441 to 56609. [2022-01-18 16:27:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56609 states, 56608 states have (on average 3.153688524590164) internal successors, (178524), 56608 states have internal predecessors, (178524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56609 states to 56609 states and 178524 transitions. [2022-01-18 16:27:58,880 INFO L78 Accepts]: Start accepts. Automaton has 56609 states and 178524 transitions. Word has length 54 [2022-01-18 16:27:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 56609 states and 178524 transitions. [2022-01-18 16:27:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 56609 states and 178524 transitions. [2022-01-18 16:27:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:27:58,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:58,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:58,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:59,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-01-18 16:27:59,155 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1291723336, now seen corresponding path program 131 times [2022-01-18 16:27:59,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:59,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052881549] [2022-01-18 16:27:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:59,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:27:59,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052881549] [2022-01-18 16:27:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052881549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375587540] [2022-01-18 16:27:59,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:59,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:59,721 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:59,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 16:27:59,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:27:59,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:59,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:27:59,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:00,235 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:00,235 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 33 treesize of output 17 [2022-01-18 16:28:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,403 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 33 treesize of output 17 [2022-01-18 16:28:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:00,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:01,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:28:01,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:28:02,488 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:02,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 101 [2022-01-18 16:28:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:02,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375587540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:02,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:02,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2022-01-18 16:28:02,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355602341] [2022-01-18 16:28:02,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:02,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-18 16:28:02,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-18 16:28:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2840, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:28:02,739 INFO L87 Difference]: Start difference. First operand 56609 states and 178524 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:06,947 INFO L93 Difference]: Finished difference Result 79140 states and 245294 transitions. [2022-01-18 16:28:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:28:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:07,138 INFO L225 Difference]: With dead ends: 79140 [2022-01-18 16:28:07,138 INFO L226 Difference]: Without dead ends: 78765 [2022-01-18 16:28:07,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2880 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=791, Invalid=10339, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 16:28:07,139 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 855 mSDsluCounter, 5046 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 3924 SdHoareTripleChecker+Invalid, 5118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:07,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 3924 Invalid, 5118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4517 Invalid, 0 Unknown, 469 Unchecked, 1.8s Time] [2022-01-18 16:28:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78765 states. [2022-01-18 16:28:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78765 to 57283. [2022-01-18 16:28:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57283 states, 57282 states have (on average 3.1476380014664294) internal successors, (180303), 57282 states have internal predecessors, (180303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57283 states to 57283 states and 180303 transitions. [2022-01-18 16:28:08,648 INFO L78 Accepts]: Start accepts. Automaton has 57283 states and 180303 transitions. Word has length 54 [2022-01-18 16:28:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:08,648 INFO L470 AbstractCegarLoop]: Abstraction has 57283 states and 180303 transitions. [2022-01-18 16:28:08,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57283 states and 180303 transitions. [2022-01-18 16:28:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:08,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:08,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:08,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:08,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:08,917 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash -209143666, now seen corresponding path program 132 times [2022-01-18 16:28:08,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:08,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368783563] [2022-01-18 16:28:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:08,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:28:09,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:09,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368783563] [2022-01-18 16:28:09,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368783563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:09,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671527757] [2022-01-18 16:28:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:09,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:09,384 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 16:28:09,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:28:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:28:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:09,849 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:09,850 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 33 treesize of output 17 [2022-01-18 16:28:09,996 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:09,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 16:28:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:10,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:10,598 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:10,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:11,088 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:11,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:28:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671527757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:11,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:11,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 48 [2022-01-18 16:28:11,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305859534] [2022-01-18 16:28:11,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:28:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:28:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:28:11,174 INFO L87 Difference]: Start difference. First operand 57283 states and 180303 transitions. Second operand has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:14,585 INFO L93 Difference]: Finished difference Result 80290 states and 248407 transitions. [2022-01-18 16:28:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:28:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:14,999 INFO L225 Difference]: With dead ends: 80290 [2022-01-18 16:28:15,000 INFO L226 Difference]: Without dead ends: 79546 [2022-01-18 16:28:15,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=538, Invalid=7118, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:28:15,000 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 555 mSDsluCounter, 4460 mSDsCounter, 0 mSdLazyCounter, 3937 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 3548 SdHoareTripleChecker+Invalid, 4040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:15,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 3548 Invalid, 4040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3937 Invalid, 0 Unknown, 19 Unchecked, 1.5s Time] [2022-01-18 16:28:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79546 states. [2022-01-18 16:28:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79546 to 57600. [2022-01-18 16:28:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57600 states, 57599 states have (on average 3.144533759266654) internal successors, (181122), 57599 states have internal predecessors, (181122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57600 states to 57600 states and 181122 transitions. [2022-01-18 16:28:16,264 INFO L78 Accepts]: Start accepts. Automaton has 57600 states and 181122 transitions. Word has length 54 [2022-01-18 16:28:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:16,264 INFO L470 AbstractCegarLoop]: Abstraction has 57600 states and 181122 transitions. [2022-01-18 16:28:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 57600 states and 181122 transitions. [2022-01-18 16:28:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:16,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:16,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:16,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:16,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 16:28:16,534 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash 388608464, now seen corresponding path program 133 times [2022-01-18 16:28:16,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:16,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502075199] [2022-01-18 16:28:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:16,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:17,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502075199] [2022-01-18 16:28:17,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502075199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725142538] [2022-01-18 16:28:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:17,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:17,076 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 16:28:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:28:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:17,601 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:17,601 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 37 treesize of output 17 [2022-01-18 16:28:17,732 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:17,732 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 33 treesize of output 17 [2022-01-18 16:28:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:18,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:18,570 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:18,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:19,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:19,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:28:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725142538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:19,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 49 [2022-01-18 16:28:19,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330042477] [2022-01-18 16:28:19,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:19,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:28:19,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:28:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:28:19,112 INFO L87 Difference]: Start difference. First operand 57600 states and 181122 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:22,402 INFO L93 Difference]: Finished difference Result 77927 states and 242070 transitions. [2022-01-18 16:28:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:28:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:22,603 INFO L225 Difference]: With dead ends: 77927 [2022-01-18 16:28:22,603 INFO L226 Difference]: Without dead ends: 77507 [2022-01-18 16:28:22,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=6175, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:28:22,604 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 570 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 3878 SdHoareTripleChecker+Invalid, 4686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:22,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 3878 Invalid, 4686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4502 Invalid, 0 Unknown, 100 Unchecked, 1.8s Time] [2022-01-18 16:28:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77507 states. [2022-01-18 16:28:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77507 to 57510. [2022-01-18 16:28:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57510 states, 57509 states have (on average 3.1453685510094074) internal successors, (180887), 57509 states have internal predecessors, (180887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57510 states to 57510 states and 180887 transitions. [2022-01-18 16:28:23,902 INFO L78 Accepts]: Start accepts. Automaton has 57510 states and 180887 transitions. Word has length 54 [2022-01-18 16:28:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 57510 states and 180887 transitions. [2022-01-18 16:28:23,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57510 states and 180887 transitions. [2022-01-18 16:28:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:23,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:23,972 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:23,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:24,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:24,173 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1307009870, now seen corresponding path program 134 times [2022-01-18 16:28:24,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993840010] [2022-01-18 16:28:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:24,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:24,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993840010] [2022-01-18 16:28:24,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993840010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459159407] [2022-01-18 16:28:24,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:28:24,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:24,961 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:24,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 16:28:24,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:28:24,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:28:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:25,367 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:25,367 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 37 treesize of output 17 [2022-01-18 16:28:25,536 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:25,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:25,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:26,103 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:26,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:26,567 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:26,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:28:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:26,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459159407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:26,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:26,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 49 [2022-01-18 16:28:26,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984463521] [2022-01-18 16:28:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:26,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:28:26,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:28:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2271, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:28:26,628 INFO L87 Difference]: Start difference. First operand 57510 states and 180887 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:30,055 INFO L93 Difference]: Finished difference Result 80189 states and 248090 transitions. [2022-01-18 16:28:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:28:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:30,249 INFO L225 Difference]: With dead ends: 80189 [2022-01-18 16:28:30,249 INFO L226 Difference]: Without dead ends: 79598 [2022-01-18 16:28:30,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=620, Invalid=8692, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:28:30,249 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 741 mSDsluCounter, 4021 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:30,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 3190 Invalid, 3800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3652 Invalid, 0 Unknown, 43 Unchecked, 1.4s Time] [2022-01-18 16:28:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79598 states. [2022-01-18 16:28:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79598 to 57737. [2022-01-18 16:28:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57737 states, 57736 states have (on average 3.1434806706387697) internal successors, (181492), 57736 states have internal predecessors, (181492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57737 states to 57737 states and 181492 transitions. [2022-01-18 16:28:31,845 INFO L78 Accepts]: Start accepts. Automaton has 57737 states and 181492 transitions. Word has length 54 [2022-01-18 16:28:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 57737 states and 181492 transitions. [2022-01-18 16:28:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 57737 states and 181492 transitions. [2022-01-18 16:28:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:31,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:31,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:31,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:32,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:32,113 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 403894998, now seen corresponding path program 135 times [2022-01-18 16:28:32,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:32,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591807066] [2022-01-18 16:28:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:32,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:32,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591807066] [2022-01-18 16:28:32,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591807066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959290310] [2022-01-18 16:28:32,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:28:32,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:32,552 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:32,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 16:28:32,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:28:32,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:28:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:33,033 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:33,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:28:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:33,245 INFO L353 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-01-18 16:28:33,245 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 35 treesize of output 27 [2022-01-18 16:28:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:33,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:34,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:28:34,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2022-01-18 16:28:34,907 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:34,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 66 [2022-01-18 16:28:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:35,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959290310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:35,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:35,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 59 [2022-01-18 16:28:35,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561401204] [2022-01-18 16:28:35,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-18 16:28:35,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-18 16:28:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3175, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:28:35,074 INFO L87 Difference]: Start difference. First operand 57737 states and 181492 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:42,901 INFO L93 Difference]: Finished difference Result 79996 states and 246764 transitions. [2022-01-18 16:28:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 16:28:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:43,093 INFO L225 Difference]: With dead ends: 79996 [2022-01-18 16:28:43,093 INFO L226 Difference]: Without dead ends: 79320 [2022-01-18 16:28:43,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7374 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2460, Invalid=23946, Unknown=0, NotChecked=0, Total=26406 [2022-01-18 16:28:43,095 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1164 mSDsluCounter, 5982 mSDsCounter, 0 mSdLazyCounter, 5636 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 4454 SdHoareTripleChecker+Invalid, 6204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 5636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:43,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 4454 Invalid, 6204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 5636 Invalid, 0 Unknown, 350 Unchecked, 2.3s Time] [2022-01-18 16:28:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79320 states. [2022-01-18 16:28:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79320 to 58050. [2022-01-18 16:28:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58050 states, 58049 states have (on average 3.1405708970008095) internal successors, (182307), 58049 states have internal predecessors, (182307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58050 states to 58050 states and 182307 transitions. [2022-01-18 16:28:44,496 INFO L78 Accepts]: Start accepts. Automaton has 58050 states and 182307 transitions. Word has length 54 [2022-01-18 16:28:44,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:44,496 INFO L470 AbstractCegarLoop]: Abstraction has 58050 states and 182307 transitions. [2022-01-18 16:28:44,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 58050 states and 182307 transitions. [2022-01-18 16:28:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:44,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:44,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:44,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 16:28:44,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2022-01-18 16:28:44,767 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1614541096, now seen corresponding path program 136 times [2022-01-18 16:28:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867475310] [2022-01-18 16:28:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:44,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:45,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:45,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867475310] [2022-01-18 16:28:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867475310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:45,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586906022] [2022-01-18 16:28:45,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:45,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:45,223 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:45,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 16:28:45,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:45,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:28:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:45,637 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:45,637 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 35 treesize of output 15 [2022-01-18 16:28:45,801 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:45,802 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 29 treesize of output 13 [2022-01-18 16:28:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:46,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:46,366 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:46,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:47,085 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:47,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:28:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:47,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586906022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:47,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:47,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 48 [2022-01-18 16:28:47,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565779131] [2022-01-18 16:28:47,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:28:47,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:28:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2179, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:28:47,160 INFO L87 Difference]: Start difference. First operand 58050 states and 182307 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:50,823 INFO L93 Difference]: Finished difference Result 79811 states and 247034 transitions. [2022-01-18 16:28:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:28:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:51,016 INFO L225 Difference]: With dead ends: 79811 [2022-01-18 16:28:51,016 INFO L226 Difference]: Without dead ends: 79171 [2022-01-18 16:28:51,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=566, Invalid=7990, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:28:51,017 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 585 mSDsluCounter, 5331 mSDsCounter, 0 mSdLazyCounter, 4614 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:51,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 4201 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4614 Invalid, 0 Unknown, 111 Unchecked, 1.9s Time] [2022-01-18 16:28:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79171 states. [2022-01-18 16:28:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79171 to 57730. [2022-01-18 16:28:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57730 states, 57729 states have (on average 3.143480746245388) internal successors, (181470), 57729 states have internal predecessors, (181470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57730 states to 57730 states and 181470 transitions. [2022-01-18 16:28:52,284 INFO L78 Accepts]: Start accepts. Automaton has 57730 states and 181470 transitions. Word has length 54 [2022-01-18 16:28:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:52,284 INFO L470 AbstractCegarLoop]: Abstraction has 57730 states and 181470 transitions. [2022-01-18 16:28:52,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 57730 states and 181470 transitions. [2022-01-18 16:28:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:28:52,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:52,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:52,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:52,557 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:28:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:52,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1815297176, now seen corresponding path program 137 times [2022-01-18 16:28:52,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:52,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404564404] [2022-01-18 16:28:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:52,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:53,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404564404] [2022-01-18 16:28:53,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404564404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019042003] [2022-01-18 16:28:53,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:28:53,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:53,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:53,010 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:53,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 16:28:53,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:28:53,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:28:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:53,714 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:53,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:28:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:53,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-18 16:28:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:54,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:54,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:54,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:28:54,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 56 [2022-01-18 16:28:55,362 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:28:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:28:55,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019042003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:55,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:55,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 51 [2022-01-18 16:28:55,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648229169] [2022-01-18 16:28:55,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:55,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-18 16:28:55,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-18 16:28:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2373, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:28:55,547 INFO L87 Difference]: Start difference. First operand 57730 states and 181470 transitions. Second operand has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:59,701 INFO L93 Difference]: Finished difference Result 66833 states and 207050 transitions. [2022-01-18 16:28:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:28:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:28:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:59,856 INFO L225 Difference]: With dead ends: 66833 [2022-01-18 16:28:59,856 INFO L226 Difference]: Without dead ends: 66239 [2022-01-18 16:28:59,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3377 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1073, Invalid=10269, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 16:28:59,857 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 739 mSDsluCounter, 5362 mSDsCounter, 0 mSdLazyCounter, 3054 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 5078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1969 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:59,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 3944 Invalid, 5078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3054 Invalid, 0 Unknown, 1969 Unchecked, 1.2s Time] [2022-01-18 16:28:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66239 states. [2022-01-18 16:29:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66239 to 58109. [2022-01-18 16:29:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58109 states, 58108 states have (on average 3.139670957527363) internal successors, (182440), 58108 states have internal predecessors, (182440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58109 states to 58109 states and 182440 transitions. [2022-01-18 16:29:01,308 INFO L78 Accepts]: Start accepts. Automaton has 58109 states and 182440 transitions. Word has length 54 [2022-01-18 16:29:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:01,309 INFO L470 AbstractCegarLoop]: Abstraction has 58109 states and 182440 transitions. [2022-01-18 16:29:01,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58109 states and 182440 transitions. [2022-01-18 16:29:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:01,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:01,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:01,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 16:29:01,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:01,578 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1396774130, now seen corresponding path program 138 times [2022-01-18 16:29:01,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:01,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246980189] [2022-01-18 16:29:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:01,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:02,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246980189] [2022-01-18 16:29:02,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246980189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937641002] [2022-01-18 16:29:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:02,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:02,003 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:02,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 16:29:02,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:29:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:29:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:02,421 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:02,421 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 33 treesize of output 17 [2022-01-18 16:29:02,622 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:02,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:02,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:03,117 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:03,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:03,586 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:03,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:29:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937641002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:03,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:03,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 47 [2022-01-18 16:29:03,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992529064] [2022-01-18 16:29:03,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:03,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:29:03,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:29:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2086, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:29:03,664 INFO L87 Difference]: Start difference. First operand 58109 states and 182440 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:06,840 INFO L93 Difference]: Finished difference Result 77830 states and 241722 transitions. [2022-01-18 16:29:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:29:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:07,041 INFO L225 Difference]: With dead ends: 77830 [2022-01-18 16:29:07,041 INFO L226 Difference]: Without dead ends: 77457 [2022-01-18 16:29:07,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=484, Invalid=6322, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:29:07,042 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 584 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 4137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:07,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 3464 Invalid, 4137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3996 Invalid, 0 Unknown, 66 Unchecked, 1.5s Time] [2022-01-18 16:29:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77457 states. [2022-01-18 16:29:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77457 to 57942. [2022-01-18 16:29:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57942 states, 57941 states have (on average 3.141212612830293) internal successors, (182005), 57941 states have internal predecessors, (182005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57942 states to 57942 states and 182005 transitions. [2022-01-18 16:29:08,548 INFO L78 Accepts]: Start accepts. Automaton has 57942 states and 182005 transitions. Word has length 54 [2022-01-18 16:29:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:08,548 INFO L470 AbstractCegarLoop]: Abstraction has 57942 states and 182005 transitions. [2022-01-18 16:29:08,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 57942 states and 182005 transitions. [2022-01-18 16:29:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:08,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:08,635 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:08,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 16:29:08,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 16:29:08,836 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1552702756, now seen corresponding path program 139 times [2022-01-18 16:29:08,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:08,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218300310] [2022-01-18 16:29:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:08,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:09,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:09,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218300310] [2022-01-18 16:29:09,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218300310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:09,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517257185] [2022-01-18 16:29:09,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:09,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:09,440 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:09,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 16:29:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:29:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:10,019 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:10,019 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 37 treesize of output 17 [2022-01-18 16:29:10,091 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:10,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:10,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:10,690 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:10,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:11,174 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:11,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:29:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:11,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517257185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:11,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:11,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 51 [2022-01-18 16:29:11,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53724038] [2022-01-18 16:29:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:11,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-18 16:29:11,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-18 16:29:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2454, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:29:11,470 INFO L87 Difference]: Start difference. First operand 57942 states and 182005 transitions. Second operand has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:14,602 INFO L93 Difference]: Finished difference Result 78625 states and 243947 transitions. [2022-01-18 16:29:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:29:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:14,995 INFO L225 Difference]: With dead ends: 78625 [2022-01-18 16:29:14,995 INFO L226 Difference]: Without dead ends: 78209 [2022-01-18 16:29:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=503, Invalid=6469, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:29:14,996 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 533 mSDsluCounter, 4789 mSDsCounter, 0 mSdLazyCounter, 4405 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 3761 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4405 Invalid, 0 Unknown, 76 Unchecked, 1.6s Time] [2022-01-18 16:29:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78209 states. [2022-01-18 16:29:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78209 to 58092. [2022-01-18 16:29:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58092 states, 58091 states have (on average 3.1397118314368835) internal successors, (182389), 58091 states have internal predecessors, (182389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58092 states to 58092 states and 182389 transitions. [2022-01-18 16:29:16,214 INFO L78 Accepts]: Start accepts. Automaton has 58092 states and 182389 transitions. Word has length 54 [2022-01-18 16:29:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:16,214 INFO L470 AbstractCegarLoop]: Abstraction has 58092 states and 182389 transitions. [2022-01-18 16:29:16,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 58092 states and 182389 transitions. [2022-01-18 16:29:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:16,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:16,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:16,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:16,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 16:29:16,486 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1149409924, now seen corresponding path program 140 times [2022-01-18 16:29:16,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356950091] [2022-01-18 16:29:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:16,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:16,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:16,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356950091] [2022-01-18 16:29:16,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356950091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:16,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739010162] [2022-01-18 16:29:16,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:16,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:16,931 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:16,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 16:29:16,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:16,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:29:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:17,428 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:17,428 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 37 treesize of output 17 [2022-01-18 16:29:17,565 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:17,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:17,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:18,468 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:18,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:18,919 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:18,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:29:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:18,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739010162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:18,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:18,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:29:18,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156382247] [2022-01-18 16:29:18,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:18,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:29:18,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:29:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:18,986 INFO L87 Difference]: Start difference. First operand 58092 states and 182389 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:22,649 INFO L93 Difference]: Finished difference Result 80050 states and 247548 transitions. [2022-01-18 16:29:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:29:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:22,877 INFO L225 Difference]: With dead ends: 80050 [2022-01-18 16:29:22,877 INFO L226 Difference]: Without dead ends: 79411 [2022-01-18 16:29:22,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=567, Invalid=7623, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:29:22,877 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 643 mSDsluCounter, 4687 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:22,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 3591 Invalid, 4789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4533 Invalid, 0 Unknown, 158 Unchecked, 1.7s Time] [2022-01-18 16:29:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79411 states. [2022-01-18 16:29:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79411 to 58199. [2022-01-18 16:29:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58199 states, 58198 states have (on average 3.138733289803773) internal successors, (182668), 58198 states have internal predecessors, (182668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58199 states to 58199 states and 182668 transitions. [2022-01-18 16:29:24,188 INFO L78 Accepts]: Start accepts. Automaton has 58199 states and 182668 transitions. Word has length 54 [2022-01-18 16:29:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:24,188 INFO L470 AbstractCegarLoop]: Abstraction has 58199 states and 182668 transitions. [2022-01-18 16:29:24,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 58199 states and 182668 transitions. [2022-01-18 16:29:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:24,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:24,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:24,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:24,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 16:29:24,466 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2052524796, now seen corresponding path program 141 times [2022-01-18 16:29:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642484070] [2022-01-18 16:29:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:24,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:24,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:24,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642484070] [2022-01-18 16:29:24,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642484070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:24,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836559400] [2022-01-18 16:29:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:29:24,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:24,992 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:24,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 16:29:25,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:29:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:29:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:25,801 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:25,801 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 33 treesize of output 17 [2022-01-18 16:29:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:25,967 INFO L353 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-01-18 16:29:25,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 16:29:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:26,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:29:26,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2022-01-18 16:29:27,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:27,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 75 [2022-01-18 16:29:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836559400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:27,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:27,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2022-01-18 16:29:27,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468666953] [2022-01-18 16:29:27,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:27,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-18 16:29:27,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:27,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-18 16:29:27,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:29:27,690 INFO L87 Difference]: Start difference. First operand 58199 states and 182668 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:32,849 INFO L93 Difference]: Finished difference Result 79581 states and 246109 transitions. [2022-01-18 16:29:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:29:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:33,046 INFO L225 Difference]: With dead ends: 79581 [2022-01-18 16:29:33,047 INFO L226 Difference]: Without dead ends: 79042 [2022-01-18 16:29:33,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4057 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1361, Invalid=13891, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 16:29:33,048 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 1096 mSDsluCounter, 5453 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 4157 SdHoareTripleChecker+Invalid, 5334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 761 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:33,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 4157 Invalid, 5334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 4379 Invalid, 0 Unknown, 761 Unchecked, 1.9s Time] [2022-01-18 16:29:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79042 states. [2022-01-18 16:29:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79042 to 58677. [2022-01-18 16:29:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58677 states, 58676 states have (on average 3.1342116026995703) internal successors, (183903), 58676 states have internal predecessors, (183903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58677 states to 58677 states and 183903 transitions. [2022-01-18 16:29:34,517 INFO L78 Accepts]: Start accepts. Automaton has 58677 states and 183903 transitions. Word has length 54 [2022-01-18 16:29:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:34,517 INFO L470 AbstractCegarLoop]: Abstraction has 58677 states and 183903 transitions. [2022-01-18 16:29:34,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58677 states and 183903 transitions. [2022-01-18 16:29:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:34,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:34,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:34,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:34,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:34,788 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -841878698, now seen corresponding path program 142 times [2022-01-18 16:29:34,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:34,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683234281] [2022-01-18 16:29:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:34,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:35,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683234281] [2022-01-18 16:29:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683234281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050838854] [2022-01-18 16:29:35,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:29:35,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:35,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:35,283 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:35,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 16:29:35,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:29:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:29:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:35,778 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:35,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2022-01-18 16:29:35,910 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:35,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 16:29:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:36,481 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:36,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:37,199 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:37,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:29:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:37,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050838854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:37,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:37,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 49 [2022-01-18 16:29:37,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511161547] [2022-01-18 16:29:37,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:37,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:29:37,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:29:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:29:37,268 INFO L87 Difference]: Start difference. First operand 58677 states and 183903 transitions. Second operand has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:40,317 INFO L93 Difference]: Finished difference Result 78495 states and 243306 transitions. [2022-01-18 16:29:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:29:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:40,733 INFO L225 Difference]: With dead ends: 78495 [2022-01-18 16:29:40,733 INFO L226 Difference]: Without dead ends: 78025 [2022-01-18 16:29:40,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=456, Invalid=6024, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:29:40,733 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 502 mSDsluCounter, 4848 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 3797 SdHoareTripleChecker+Invalid, 4634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:40,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 3797 Invalid, 4634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4537 Invalid, 0 Unknown, 20 Unchecked, 1.6s Time] [2022-01-18 16:29:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78025 states. [2022-01-18 16:29:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78025 to 58316. [2022-01-18 16:29:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58316 states, 58315 states have (on average 3.13749464117294) internal successors, (182963), 58315 states have internal predecessors, (182963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58316 states to 58316 states and 182963 transitions. [2022-01-18 16:29:41,984 INFO L78 Accepts]: Start accepts. Automaton has 58316 states and 182963 transitions. Word has length 54 [2022-01-18 16:29:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 58316 states and 182963 transitions. [2022-01-18 16:29:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 58316 states and 182963 transitions. [2022-01-18 16:29:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:42,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:42,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:42,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:42,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:42,256 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1134123390, now seen corresponding path program 143 times [2022-01-18 16:29:42,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:42,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871133416] [2022-01-18 16:29:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:42,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:42,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871133416] [2022-01-18 16:29:42,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871133416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626225194] [2022-01-18 16:29:42,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:42,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:42,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:42,692 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:42,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 16:29:42,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:29:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:29:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:43,182 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:43,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:29:43,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:43,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:43,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-01-18 16:29:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:43,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:44,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:29:44,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2022-01-18 16:29:45,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:45,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2022-01-18 16:29:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:45,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626225194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:45,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:45,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2022-01-18 16:29:45,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640485572] [2022-01-18 16:29:45,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:45,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:29:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:29:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:29:45,293 INFO L87 Difference]: Start difference. First operand 58316 states and 182963 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:49,568 INFO L93 Difference]: Finished difference Result 81488 states and 251398 transitions. [2022-01-18 16:29:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:29:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:49,780 INFO L225 Difference]: With dead ends: 81488 [2022-01-18 16:29:49,780 INFO L226 Difference]: Without dead ends: 80936 [2022-01-18 16:29:49,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=929, Invalid=10201, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 16:29:49,781 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 802 mSDsluCounter, 4535 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:49,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 3465 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4338 Invalid, 0 Unknown, 265 Unchecked, 1.7s Time] [2022-01-18 16:29:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80936 states. [2022-01-18 16:29:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80936 to 58581. [2022-01-18 16:29:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58581 states, 58580 states have (on average 3.135233868214408) internal successors, (183662), 58580 states have internal predecessors, (183662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58581 states to 58581 states and 183662 transitions. [2022-01-18 16:29:51,144 INFO L78 Accepts]: Start accepts. Automaton has 58581 states and 183662 transitions. Word has length 54 [2022-01-18 16:29:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:51,144 INFO L470 AbstractCegarLoop]: Abstraction has 58581 states and 183662 transitions. [2022-01-18 16:29:51,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 58581 states and 183662 transitions. [2022-01-18 16:29:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:51,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:51,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:51,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:51,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:51,683 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash -243045096, now seen corresponding path program 144 times [2022-01-18 16:29:51,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:51,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613108234] [2022-01-18 16:29:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:51,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:52,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613108234] [2022-01-18 16:29:52,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613108234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194061734] [2022-01-18 16:29:52,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:52,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:52,113 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:52,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 16:29:52,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:29:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:52,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:29:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:52,553 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:52,553 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 33 treesize of output 17 [2022-01-18 16:29:52,714 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:52,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:53,305 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:53,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:53,785 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:53,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:29:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:29:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194061734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:53,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:53,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:29:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60088224] [2022-01-18 16:29:53,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:53,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:29:53,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:29:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:53,864 INFO L87 Difference]: Start difference. First operand 58581 states and 183662 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:57,771 INFO L93 Difference]: Finished difference Result 81168 states and 250433 transitions. [2022-01-18 16:29:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:29:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:29:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:57,961 INFO L225 Difference]: With dead ends: 81168 [2022-01-18 16:29:57,961 INFO L226 Difference]: Without dead ends: 80533 [2022-01-18 16:29:57,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=630, Invalid=8876, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:29:57,962 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 737 mSDsluCounter, 4635 mSDsCounter, 0 mSdLazyCounter, 4527 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:57,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 3504 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4527 Invalid, 0 Unknown, 135 Unchecked, 1.9s Time] [2022-01-18 16:29:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80533 states. [2022-01-18 16:29:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80533 to 58522. [2022-01-18 16:29:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58522 states, 58521 states have (on average 3.135985372772167) internal successors, (183521), 58521 states have internal predecessors, (183521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58522 states to 58522 states and 183521 transitions. [2022-01-18 16:29:59,652 INFO L78 Accepts]: Start accepts. Automaton has 58522 states and 183521 transitions. Word has length 54 [2022-01-18 16:29:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 58522 states and 183521 transitions. [2022-01-18 16:29:59,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 58522 states and 183521 transitions. [2022-01-18 16:29:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:29:59,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:59,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:59,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:59,985 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2037238262, now seen corresponding path program 145 times [2022-01-18 16:29:59,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454081120] [2022-01-18 16:29:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:59,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:00,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454081120] [2022-01-18 16:30:00,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454081120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426465212] [2022-01-18 16:30:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:30:00,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:00,402 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:00,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 16:30:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:00,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:30:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:00,851 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:00,851 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 37 treesize of output 17 [2022-01-18 16:30:01,026 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:01,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:30:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:01,688 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:01,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:02,193 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:02,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:02,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426465212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:02,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:02,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:30:02,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798715845] [2022-01-18 16:30:02,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:02,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:02,266 INFO L87 Difference]: Start difference. First operand 58522 states and 183521 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:06,030 INFO L93 Difference]: Finished difference Result 79857 states and 246981 transitions. [2022-01-18 16:30:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:30:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:06,233 INFO L225 Difference]: With dead ends: 79857 [2022-01-18 16:30:06,233 INFO L226 Difference]: Without dead ends: 79207 [2022-01-18 16:30:06,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=584, Invalid=8536, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:30:06,234 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 717 mSDsluCounter, 4792 mSDsCounter, 0 mSdLazyCounter, 4582 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 4778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:06,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 3691 Invalid, 4778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4582 Invalid, 0 Unknown, 95 Unchecked, 1.7s Time] [2022-01-18 16:30:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79207 states. [2022-01-18 16:30:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79207 to 58715. [2022-01-18 16:30:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58715 states, 58714 states have (on average 3.1345335013795688) internal successors, (184041), 58714 states have internal predecessors, (184041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58715 states to 58715 states and 184041 transitions. [2022-01-18 16:30:07,885 INFO L78 Accepts]: Start accepts. Automaton has 58715 states and 184041 transitions. Word has length 54 [2022-01-18 16:30:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 58715 states and 184041 transitions. [2022-01-18 16:30:07,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 58715 states and 184041 transitions. [2022-01-18 16:30:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:08,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:08,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:08,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 16:30:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:08,212 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 38536860, now seen corresponding path program 146 times [2022-01-18 16:30:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135377079] [2022-01-18 16:30:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:08,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:08,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135377079] [2022-01-18 16:30:08,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135377079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700209849] [2022-01-18 16:30:08,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:08,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:08,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:08,635 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:08,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 16:30:08,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:08,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:30:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:09,082 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:09,082 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 37 treesize of output 17 [2022-01-18 16:30:09,243 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:09,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:09,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:09,876 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:09,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:10,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:10,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:10,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700209849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:10,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:10,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:30:10,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955378137] [2022-01-18 16:30:10,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:10,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:10,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:10,455 INFO L87 Difference]: Start difference. First operand 58715 states and 184041 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:13,945 INFO L93 Difference]: Finished difference Result 78872 states and 244469 transitions. [2022-01-18 16:30:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:30:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:14,135 INFO L225 Difference]: With dead ends: 78872 [2022-01-18 16:30:14,135 INFO L226 Difference]: Without dead ends: 78469 [2022-01-18 16:30:14,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=514, Invalid=7142, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:30:14,136 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 675 mSDsluCounter, 4744 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 3656 SdHoareTripleChecker+Invalid, 4792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:14,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 3656 Invalid, 4792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4607 Invalid, 0 Unknown, 97 Unchecked, 1.7s Time] [2022-01-18 16:30:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78469 states. [2022-01-18 16:30:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78469 to 58412. [2022-01-18 16:30:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58412 states, 58411 states have (on average 3.137165944770677) internal successors, (183245), 58411 states have internal predecessors, (183245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58412 states to 58412 states and 183245 transitions. [2022-01-18 16:30:15,632 INFO L78 Accepts]: Start accepts. Automaton has 58412 states and 183245 transitions. Word has length 54 [2022-01-18 16:30:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 58412 states and 183245 transitions. [2022-01-18 16:30:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 58412 states and 183245 transitions. [2022-01-18 16:30:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:15,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:15,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:15,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 16:30:15,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:15,903 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 401875428, now seen corresponding path program 147 times [2022-01-18 16:30:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609443285] [2022-01-18 16:30:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:15,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:16,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:16,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609443285] [2022-01-18 16:30:16,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609443285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:16,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853626571] [2022-01-18 16:30:16,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:16,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:16,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:16,386 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:16,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 16:30:16,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:30:16,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:30:16,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:16,944 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:16,944 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 33 treesize of output 17 [2022-01-18 16:30:17,017 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:17,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:17,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:17,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:17,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:30:18,405 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:18,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:18,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853626571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:18,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:18,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 51 [2022-01-18 16:30:18,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105277940] [2022-01-18 16:30:18,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:18,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-18 16:30:18,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-18 16:30:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:30:18,490 INFO L87 Difference]: Start difference. First operand 58412 states and 183245 transitions. Second operand has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:22,060 INFO L93 Difference]: Finished difference Result 78910 states and 244440 transitions. [2022-01-18 16:30:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:30:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:22,250 INFO L225 Difference]: With dead ends: 78910 [2022-01-18 16:30:22,250 INFO L226 Difference]: Without dead ends: 78494 [2022-01-18 16:30:22,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=525, Invalid=6957, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:30:22,251 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 576 mSDsluCounter, 5071 mSDsCounter, 0 mSdLazyCounter, 4734 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:22,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 3931 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4734 Invalid, 0 Unknown, 162 Unchecked, 1.7s Time] [2022-01-18 16:30:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78494 states. [2022-01-18 16:30:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78494 to 58577. [2022-01-18 16:30:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58577 states, 58576 states have (on average 3.1356698989347174) internal successors, (183675), 58576 states have internal predecessors, (183675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58577 states to 58577 states and 183675 transitions. [2022-01-18 16:30:23,533 INFO L78 Accepts]: Start accepts. Automaton has 58577 states and 183675 transitions. Word has length 54 [2022-01-18 16:30:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:23,533 INFO L470 AbstractCegarLoop]: Abstraction has 58577 states and 183675 transitions. [2022-01-18 16:30:23,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 58577 states and 183675 transitions. [2022-01-18 16:30:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:23,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:23,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:23,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:23,805 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash 805168260, now seen corresponding path program 148 times [2022-01-18 16:30:23,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:23,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808194932] [2022-01-18 16:30:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:23,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:24,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808194932] [2022-01-18 16:30:24,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808194932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453905801] [2022-01-18 16:30:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:24,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:24,250 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:24,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 16:30:24,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:30:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:24,734 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:24,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2022-01-18 16:30:24,868 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:24,869 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 33 treesize of output 17 [2022-01-18 16:30:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:25,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:25,763 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:25,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:30:26,222 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:26,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453905801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:26,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:26,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:30:26,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566348222] [2022-01-18 16:30:26,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:26,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:26,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:26,295 INFO L87 Difference]: Start difference. First operand 58577 states and 183675 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:30,152 INFO L93 Difference]: Finished difference Result 80925 states and 249857 transitions. [2022-01-18 16:30:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:30:30,153 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:30,346 INFO L225 Difference]: With dead ends: 80925 [2022-01-18 16:30:30,346 INFO L226 Difference]: Without dead ends: 80334 [2022-01-18 16:30:30,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=589, Invalid=8153, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:30:30,347 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 608 mSDsluCounter, 5227 mSDsCounter, 0 mSdLazyCounter, 4964 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 5231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:30,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 3995 Invalid, 5231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4964 Invalid, 0 Unknown, 177 Unchecked, 1.8s Time] [2022-01-18 16:30:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80334 states. [2022-01-18 16:30:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80334 to 58549. [2022-01-18 16:30:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58549 states, 58548 states have (on average 3.1361447017831523) internal successors, (183615), 58548 states have internal predecessors, (183615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58549 states to 58549 states and 183615 transitions. [2022-01-18 16:30:31,681 INFO L78 Accepts]: Start accepts. Automaton has 58549 states and 183615 transitions. Word has length 54 [2022-01-18 16:30:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:31,681 INFO L470 AbstractCegarLoop]: Abstraction has 58549 states and 183615 transitions. [2022-01-18 16:30:31,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58549 states and 183615 transitions. [2022-01-18 16:30:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:31,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:31,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:31,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 16:30:31,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 16:30:31,955 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -97946612, now seen corresponding path program 149 times [2022-01-18 16:30:31,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:31,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110036532] [2022-01-18 16:30:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:31,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:32,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110036532] [2022-01-18 16:30:32,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110036532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073062895] [2022-01-18 16:30:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:30:32,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:32,407 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:32,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 16:30:32,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:30:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:30:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:32,928 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:32,929 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 33 treesize of output 17 [2022-01-18 16:30:33,060 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:33,060 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 33 treesize of output 17 [2022-01-18 16:30:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:33,995 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:33,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:30:34,404 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:34,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:34,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073062895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:34,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:34,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:30:34,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648415324] [2022-01-18 16:30:34,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:34,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:34,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2364, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:34,470 INFO L87 Difference]: Start difference. First operand 58549 states and 183615 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:37,737 INFO L93 Difference]: Finished difference Result 79250 states and 245331 transitions. [2022-01-18 16:30:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:30:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:37,934 INFO L225 Difference]: With dead ends: 79250 [2022-01-18 16:30:37,935 INFO L226 Difference]: Without dead ends: 78830 [2022-01-18 16:30:37,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=511, Invalid=6971, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:30:37,935 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 600 mSDsluCounter, 4016 mSDsCounter, 0 mSdLazyCounter, 3950 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:37,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 3129 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3950 Invalid, 0 Unknown, 111 Unchecked, 1.5s Time] [2022-01-18 16:30:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78830 states. [2022-01-18 16:30:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78830 to 58549. [2022-01-18 16:30:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58549 states, 58548 states have (on average 3.1358714217394277) internal successors, (183599), 58548 states have internal predecessors, (183599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58549 states to 58549 states and 183599 transitions. [2022-01-18 16:30:39,204 INFO L78 Accepts]: Start accepts. Automaton has 58549 states and 183599 transitions. Word has length 54 [2022-01-18 16:30:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:39,204 INFO L470 AbstractCegarLoop]: Abstraction has 58549 states and 183599 transitions. [2022-01-18 16:30:39,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 58549 states and 183599 transitions. [2022-01-18 16:30:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:39,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:39,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:39,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 16:30:39,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 16:30:39,474 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash 820454794, now seen corresponding path program 150 times [2022-01-18 16:30:39,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:39,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839793568] [2022-01-18 16:30:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:39,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:39,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:39,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839793568] [2022-01-18 16:30:39,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839793568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:39,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263458480] [2022-01-18 16:30:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:30:39,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:39,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:39,911 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:39,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 16:30:39,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:30:39,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:39,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:30:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:40,350 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:40,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:30:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:40,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-01-18 16:30:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:40,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:41,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:30:41,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 58 [2022-01-18 16:30:41,967 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:41,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:42,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263458480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:42,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:42,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2022-01-18 16:30:42,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743149097] [2022-01-18 16:30:42,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:42,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:30:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:30:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:30:42,111 INFO L87 Difference]: Start difference. First operand 58549 states and 183599 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:47,052 INFO L93 Difference]: Finished difference Result 82928 states and 255248 transitions. [2022-01-18 16:30:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:30:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:47,250 INFO L225 Difference]: With dead ends: 82928 [2022-01-18 16:30:47,251 INFO L226 Difference]: Without dead ends: 82274 [2022-01-18 16:30:47,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1258, Invalid=13262, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 16:30:47,252 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 966 mSDsluCounter, 4472 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 4911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:47,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 3379 Invalid, 4911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 4451 Invalid, 0 Unknown, 287 Unchecked, 1.8s Time] [2022-01-18 16:30:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82274 states. [2022-01-18 16:30:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82274 to 58781. [2022-01-18 16:30:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58781 states, 58780 states have (on average 3.133855052739027) internal successors, (184208), 58780 states have internal predecessors, (184208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58781 states to 58781 states and 184208 transitions. [2022-01-18 16:30:48,583 INFO L78 Accepts]: Start accepts. Automaton has 58781 states and 184208 transitions. Word has length 54 [2022-01-18 16:30:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:48,583 INFO L470 AbstractCegarLoop]: Abstraction has 58781 states and 184208 transitions. [2022-01-18 16:30:48,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 58781 states and 184208 transitions. [2022-01-18 16:30:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:48,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:48,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:48,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:49,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:49,120 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -199626272, now seen corresponding path program 151 times [2022-01-18 16:30:49,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:49,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202144347] [2022-01-18 16:30:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:49,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:49,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:49,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202144347] [2022-01-18 16:30:49,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202144347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:49,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507121105] [2022-01-18 16:30:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:30:49,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:49,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:49,543 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:49,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 16:30:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:49,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:30:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:49,979 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:49,979 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 37 treesize of output 17 [2022-01-18 16:30:50,184 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:50,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:30:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:50,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:50,757 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:50,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:30:51,198 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:51,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:30:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:51,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507121105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:51,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:51,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 48 [2022-01-18 16:30:51,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105136531] [2022-01-18 16:30:51,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:51,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:30:51,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:30:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2180, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:30:51,261 INFO L87 Difference]: Start difference. First operand 58781 states and 184208 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:55,765 INFO L93 Difference]: Finished difference Result 81848 states and 252223 transitions. [2022-01-18 16:30:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:30:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:30:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:55,972 INFO L225 Difference]: With dead ends: 81848 [2022-01-18 16:30:55,972 INFO L226 Difference]: Without dead ends: 81361 [2022-01-18 16:30:55,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=650, Invalid=9250, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:30:55,973 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 668 mSDsluCounter, 6272 mSDsCounter, 0 mSdLazyCounter, 6069 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 4838 SdHoareTripleChecker+Invalid, 6191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 6069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:55,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 4838 Invalid, 6191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 6069 Invalid, 0 Unknown, 12 Unchecked, 2.3s Time] [2022-01-18 16:30:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81361 states. [2022-01-18 16:30:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81361 to 58898. [2022-01-18 16:30:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58898 states, 58897 states have (on average 3.1327571862743433) internal successors, (184510), 58897 states have internal predecessors, (184510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58898 states to 58898 states and 184510 transitions. [2022-01-18 16:30:57,633 INFO L78 Accepts]: Start accepts. Automaton has 58898 states and 184510 transitions. Word has length 54 [2022-01-18 16:30:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 58898 states and 184510 transitions. [2022-01-18 16:30:57,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 58898 states and 184510 transitions. [2022-01-18 16:30:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:30:57,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:57,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:57,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:57,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 16:30:57,908 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash -82660078, now seen corresponding path program 152 times [2022-01-18 16:30:57,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:57,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78342487] [2022-01-18 16:30:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:57,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:58,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78342487] [2022-01-18 16:30:58,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78342487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784272735] [2022-01-18 16:30:58,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:58,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:58,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:58,350 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 16:30:58,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:58,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:30:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:58,799 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:58,799 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 37 treesize of output 17 [2022-01-18 16:30:58,967 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:58,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:30:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:59,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:59,608 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:59,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:00,058 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:00,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784272735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:00,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:00,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:31:00,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381701660] [2022-01-18 16:31:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:00,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:31:00,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:31:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:31:00,141 INFO L87 Difference]: Start difference. First operand 58898 states and 184510 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:04,295 INFO L93 Difference]: Finished difference Result 81394 states and 251089 transitions. [2022-01-18 16:31:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:31:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:04,490 INFO L225 Difference]: With dead ends: 81394 [2022-01-18 16:31:04,490 INFO L226 Difference]: Without dead ends: 80744 [2022-01-18 16:31:04,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=665, Invalid=9841, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:31:04,492 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 754 mSDsluCounter, 4848 mSDsCounter, 0 mSdLazyCounter, 4821 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 3738 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:04,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 3738 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4821 Invalid, 0 Unknown, 64 Unchecked, 2.0s Time] [2022-01-18 16:31:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80744 states. [2022-01-18 16:31:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80744 to 59091. [2022-01-18 16:31:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59091 states, 59090 states have (on average 3.1313250973091895) internal successors, (185030), 59090 states have internal predecessors, (185030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59091 states to 59091 states and 185030 transitions. [2022-01-18 16:31:06,029 INFO L78 Accepts]: Start accepts. Automaton has 59091 states and 185030 transitions. Word has length 54 [2022-01-18 16:31:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 59091 states and 185030 transitions. [2022-01-18 16:31:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59091 states and 185030 transitions. [2022-01-18 16:31:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:06,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:06,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:06,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:06,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-01-18 16:31:06,303 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1993115044, now seen corresponding path program 153 times [2022-01-18 16:31:06,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099160459] [2022-01-18 16:31:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:06,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:06,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099160459] [2022-01-18 16:31:06,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099160459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723407332] [2022-01-18 16:31:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:31:06,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:06,727 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:06,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 16:31:06,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:31:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:31:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:07,167 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:07,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:31:07,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:07,388 INFO L353 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-01-18 16:31:07,389 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 35 treesize of output 27 [2022-01-18 16:31:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:07,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:08,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:08,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:08,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:08,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 58 [2022-01-18 16:31:09,062 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:09,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:09,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723407332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:09,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:09,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2022-01-18 16:31:09,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655592458] [2022-01-18 16:31:09,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:09,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-18 16:31:09,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-18 16:31:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2847, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:31:09,216 INFO L87 Difference]: Start difference. First operand 59091 states and 185030 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:18,713 INFO L93 Difference]: Finished difference Result 88177 states and 270076 transitions. [2022-01-18 16:31:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-18 16:31:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:18,930 INFO L225 Difference]: With dead ends: 88177 [2022-01-18 16:31:18,930 INFO L226 Difference]: Without dead ends: 87429 [2022-01-18 16:31:18,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 74 SyntacticMatches, 15 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10670 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3243, Invalid=29699, Unknown=0, NotChecked=0, Total=32942 [2022-01-18 16:31:18,931 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 1304 mSDsluCounter, 7153 mSDsCounter, 0 mSdLazyCounter, 6165 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 5377 SdHoareTripleChecker+Invalid, 7372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 6165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 962 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:18,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1304 Valid, 5377 Invalid, 7372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 6165 Invalid, 0 Unknown, 962 Unchecked, 2.5s Time] [2022-01-18 16:31:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87429 states. [2022-01-18 16:31:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87429 to 59754. [2022-01-18 16:31:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59754 states, 59753 states have (on average 3.1258848928087293) internal successors, (186781), 59753 states have internal predecessors, (186781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59754 states to 59754 states and 186781 transitions. [2022-01-18 16:31:20,334 INFO L78 Accepts]: Start accepts. Automaton has 59754 states and 186781 transitions. Word has length 54 [2022-01-18 16:31:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 59754 states and 186781 transitions. [2022-01-18 16:31:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 59754 states and 186781 transitions. [2022-01-18 16:31:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:20,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:20,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:20,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-01-18 16:31:20,608 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1091206154, now seen corresponding path program 154 times [2022-01-18 16:31:20,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810633208] [2022-01-18 16:31:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:20,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:21,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810633208] [2022-01-18 16:31:21,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810633208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617769098] [2022-01-18 16:31:21,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:31:21,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:21,041 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:21,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 16:31:21,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:31:21,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:31:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:21,773 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:31:21,773 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 37 treesize of output 17 [2022-01-18 16:31:21,935 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:21,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 16:31:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:22,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:22,562 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:22,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:22,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:22,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:23,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617769098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:23,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:23,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 49 [2022-01-18 16:31:23,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899930718] [2022-01-18 16:31:23,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:23,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:31:23,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:31:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2271, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:31:23,053 INFO L87 Difference]: Start difference. First operand 59754 states and 186781 transitions. Second operand has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:26,692 INFO L93 Difference]: Finished difference Result 80687 states and 249213 transitions. [2022-01-18 16:31:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:31:26,692 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:26,883 INFO L225 Difference]: With dead ends: 80687 [2022-01-18 16:31:26,883 INFO L226 Difference]: Without dead ends: 80171 [2022-01-18 16:31:26,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=516, Invalid=7140, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:31:26,884 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 559 mSDsluCounter, 4972 mSDsCounter, 0 mSdLazyCounter, 4767 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 3818 SdHoareTripleChecker+Invalid, 4963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:26,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 3818 Invalid, 4963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4767 Invalid, 0 Unknown, 117 Unchecked, 1.9s Time] [2022-01-18 16:31:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80171 states. [2022-01-18 16:31:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80171 to 58681. [2022-01-18 16:31:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58681 states, 58680 states have (on average 3.134645535105658) internal successors, (183941), 58680 states have internal predecessors, (183941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58681 states to 58681 states and 183941 transitions. [2022-01-18 16:31:28,173 INFO L78 Accepts]: Start accepts. Automaton has 58681 states and 183941 transitions. Word has length 54 [2022-01-18 16:31:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:28,173 INFO L470 AbstractCegarLoop]: Abstraction has 58681 states and 183941 transitions. [2022-01-18 16:31:28,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 58681 states and 183941 transitions. [2022-01-18 16:31:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:28,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:28,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:28,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 16:31:28,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:28,449 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1359589718, now seen corresponding path program 155 times [2022-01-18 16:31:28,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:28,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191378134] [2022-01-18 16:31:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:28,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:28,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191378134] [2022-01-18 16:31:28,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191378134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585774257] [2022-01-18 16:31:28,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:31:28,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:28,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:28,876 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 16:31:28,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:31:28,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:31:28,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:29,488 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:29,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 16:31:29,703 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:31:29,703 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 33 treesize of output 17 [2022-01-18 16:31:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:29,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:30,317 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:30,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:30,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:30,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:30,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585774257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:30,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:30,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:31:30,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213760761] [2022-01-18 16:31:30,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:30,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:31:30,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:31:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:31:30,829 INFO L87 Difference]: Start difference. First operand 58681 states and 183941 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:34,899 INFO L93 Difference]: Finished difference Result 84191 states and 258554 transitions. [2022-01-18 16:31:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:31:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:35,099 INFO L225 Difference]: With dead ends: 84191 [2022-01-18 16:31:35,100 INFO L226 Difference]: Without dead ends: 83571 [2022-01-18 16:31:35,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=714, Invalid=9792, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:31:35,100 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 696 mSDsluCounter, 5242 mSDsCounter, 0 mSdLazyCounter, 4864 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 4022 SdHoareTripleChecker+Invalid, 5200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:35,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 4022 Invalid, 5200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4864 Invalid, 0 Unknown, 220 Unchecked, 1.8s Time] [2022-01-18 16:31:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83571 states. [2022-01-18 16:31:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83571 to 58965. [2022-01-18 16:31:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58965 states, 58964 states have (on average 3.1322841055559323) internal successors, (184692), 58964 states have internal predecessors, (184692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58965 states to 58965 states and 184692 transitions. [2022-01-18 16:31:36,461 INFO L78 Accepts]: Start accepts. Automaton has 58965 states and 184692 transitions. Word has length 54 [2022-01-18 16:31:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:36,461 INFO L470 AbstractCegarLoop]: Abstraction has 58965 states and 184692 transitions. [2022-01-18 16:31:36,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58965 states and 184692 transitions. [2022-01-18 16:31:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:36,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:36,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:36,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:36,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:36,735 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2032262706, now seen corresponding path program 156 times [2022-01-18 16:31:36,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:36,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237788023] [2022-01-18 16:31:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:36,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:37,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237788023] [2022-01-18 16:31:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237788023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627550106] [2022-01-18 16:31:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:31:37,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:37,417 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:37,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 16:31:37,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:31:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:31:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:37,778 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:37,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 16:31:38,000 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:38,000 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 33 treesize of output 17 [2022-01-18 16:31:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:38,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:38,608 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:38,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:39,058 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:39,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627550106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:39,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:31:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159545572] [2022-01-18 16:31:39,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:31:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:31:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:31:39,150 INFO L87 Difference]: Start difference. First operand 58965 states and 184692 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:43,684 INFO L93 Difference]: Finished difference Result 82065 states and 252755 transitions. [2022-01-18 16:31:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:31:43,685 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:43,878 INFO L225 Difference]: With dead ends: 82065 [2022-01-18 16:31:43,879 INFO L226 Difference]: Without dead ends: 81431 [2022-01-18 16:31:43,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=714, Invalid=10206, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:31:43,879 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 692 mSDsluCounter, 6164 mSDsCounter, 0 mSdLazyCounter, 5913 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 4703 SdHoareTripleChecker+Invalid, 6098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:43,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 4703 Invalid, 6098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5913 Invalid, 0 Unknown, 83 Unchecked, 2.3s Time] [2022-01-18 16:31:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81431 states. [2022-01-18 16:31:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81431 to 58960. [2022-01-18 16:31:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58960 states, 58959 states have (on average 3.1322444410522565) internal successors, (184674), 58959 states have internal predecessors, (184674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58960 states to 58960 states and 184674 transitions. [2022-01-18 16:31:45,192 INFO L78 Accepts]: Start accepts. Automaton has 58960 states and 184674 transitions. Word has length 54 [2022-01-18 16:31:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:45,192 INFO L470 AbstractCegarLoop]: Abstraction has 58960 states and 184674 transitions. [2022-01-18 16:31:45,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 58960 states and 184674 transitions. [2022-01-18 16:31:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:45,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:45,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:45,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 16:31:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:45,727 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash -186929468, now seen corresponding path program 157 times [2022-01-18 16:31:45,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:45,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485942975] [2022-01-18 16:31:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:45,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:46,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:46,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485942975] [2022-01-18 16:31:46,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485942975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387697879] [2022-01-18 16:31:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:31:46,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:46,160 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 16:31:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:46,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:31:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:46,534 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:31:46,534 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 37 treesize of output 17 [2022-01-18 16:31:46,747 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:46,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 16:31:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:47,383 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:47,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:47,798 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:47,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:47,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387697879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:47,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:31:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003082916] [2022-01-18 16:31:47,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:47,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:31:47,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:31:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:31:47,874 INFO L87 Difference]: Start difference. First operand 58960 states and 184674 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:51,646 INFO L93 Difference]: Finished difference Result 82333 states and 253541 transitions. [2022-01-18 16:31:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 16:31:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:51,843 INFO L225 Difference]: With dead ends: 82333 [2022-01-18 16:31:51,843 INFO L226 Difference]: Without dead ends: 81879 [2022-01-18 16:31:51,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=733, Invalid=10397, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 16:31:51,844 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 783 mSDsluCounter, 3802 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2963 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:51,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 2963 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3623 Invalid, 0 Unknown, 54 Unchecked, 1.6s Time] [2022-01-18 16:31:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81879 states. [2022-01-18 16:31:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81879 to 58939. [2022-01-18 16:31:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58939 states, 58938 states have (on average 3.132461230445553) internal successors, (184621), 58938 states have internal predecessors, (184621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58939 states to 58939 states and 184621 transitions. [2022-01-18 16:31:53,180 INFO L78 Accepts]: Start accepts. Automaton has 58939 states and 184621 transitions. Word has length 54 [2022-01-18 16:31:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:53,180 INFO L470 AbstractCegarLoop]: Abstraction has 58939 states and 184621 transitions. [2022-01-18 16:31:53,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 58939 states and 184621 transitions. [2022-01-18 16:31:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:31:53,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:53,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:53,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:53,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:53,731 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -146140212, now seen corresponding path program 158 times [2022-01-18 16:31:53,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:53,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442636723] [2022-01-18 16:31:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:53,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:54,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442636723] [2022-01-18 16:31:54,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442636723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218809920] [2022-01-18 16:31:54,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:31:54,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:54,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:54,140 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:54,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 16:31:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:31:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:31:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:54,497 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:31:54,497 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 35 treesize of output 15 [2022-01-18 16:31:54,696 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:54,696 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 33 treesize of output 17 [2022-01-18 16:31:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:55,317 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:55,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-01-18 16:31:55,775 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:55,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 16:31:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:31:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218809920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:55,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:55,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2022-01-18 16:31:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189904977] [2022-01-18 16:31:55,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:55,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:31:55,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:31:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2364, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:31:55,875 INFO L87 Difference]: Start difference. First operand 58939 states and 184621 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:59,534 INFO L93 Difference]: Finished difference Result 81120 states and 250336 transitions. [2022-01-18 16:31:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:31:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-18 16:31:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:59,757 INFO L225 Difference]: With dead ends: 81120 [2022-01-18 16:31:59,757 INFO L226 Difference]: Without dead ends: 80717 [2022-01-18 16:31:59,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=517, Invalid=7315, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:31:59,758 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 720 mSDsluCounter, 5092 mSDsCounter, 0 mSdLazyCounter, 4747 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 3868 SdHoareTripleChecker+Invalid, 4962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:59,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 3868 Invalid, 4962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4747 Invalid, 0 Unknown, 146 Unchecked, 1.8s Time] [2022-01-18 16:31:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80717 states. [2022-01-18 16:32:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80717 to 58929. [2022-01-18 16:32:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58929 states, 58928 states have (on average 3.1324667390714094) internal successors, (184590), 58928 states have internal predecessors, (184590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58929 states to 58929 states and 184590 transitions. [2022-01-18 16:32:01,056 INFO L78 Accepts]: Start accepts. Automaton has 58929 states and 184590 transitions. Word has length 54 [2022-01-18 16:32:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:01,056 INFO L470 AbstractCegarLoop]: Abstraction has 58929 states and 184590 transitions. [2022-01-18 16:32:01,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 58929 states and 184590 transitions. [2022-01-18 16:32:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-18 16:32:01,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:01,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:01,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 16:32:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:01,327 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:32:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1988793030, now seen corresponding path program 159 times [2022-01-18 16:32:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424909666] [2022-01-18 16:32:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:01,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:32:02,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424909666] [2022-01-18 16:32:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424909666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999869189] [2022-01-18 16:32:02,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:32:02,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:02,052 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:02,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 16:32:02,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:32:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:02,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:32:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:02,587 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:32:02,587 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 33 treesize of output 17 [2022-01-18 16:32:02,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:02,680 INFO L353 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-01-18 16:32:02,680 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 27 treesize of output 23 [2022-01-18 16:32:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:03,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:03,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:03,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:03,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:03,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2022-01-18 16:32:04,122 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:32:04,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2022-01-18 16:32:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:04,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999869189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:04,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:04,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2022-01-18 16:32:04,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954536619] [2022-01-18 16:32:04,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:04,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-18 16:32:04,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-18 16:32:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2887, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:32:04,279 INFO L87 Difference]: Start difference. First operand 58929 states and 184590 transitions. Second operand has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 16:32:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:32:08,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1168, Invalid=11264, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:32:08,531 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 759 mSDsluCounter, 4552 mSDsCounter, 0 mSdLazyCounter, 4069 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 4712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:08,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 3568 Invalid, 4712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4069 Invalid, 0 Unknown, 480 Unchecked, 1.7s Time] [2022-01-18 16:32:08,531 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 16:32:08,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:32:08,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:32:08,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 16:32:08,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:08,732 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (58929states) and FLOYD_HOARE automaton (currently 74 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 112 known predicates. [2022-01-18 16:32:08,733 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 16:32:08,733 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 16:32:08,733 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 16:32:08,736 INFO L732 BasicCegarLoop]: Path program histogram: [159, 6, 1, 1] [2022-01-18 16:32:08,737 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:32:08,737 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:32:08,739 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:32:08 BasicIcfg [2022-01-18 16:32:08,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:32:08,739 INFO L158 Benchmark]: Toolchain (without parser) took 704190.71ms. Allocated memory was 358.6MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 320.0MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2022-01-18 16:32:08,739 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 358.6MB. Free memory is still 321.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:32:08,739 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.81ms. Allocated memory is still 358.6MB. Free memory was 320.0MB in the beginning and 318.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 16:32:08,739 INFO L158 Benchmark]: Boogie Preprocessor took 28.68ms. Allocated memory is still 358.6MB. Free memory was 318.4MB in the beginning and 317.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:32:08,740 INFO L158 Benchmark]: RCFGBuilder took 267.96ms. Allocated memory is still 358.6MB. Free memory was 317.4MB in the beginning and 307.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 16:32:08,740 INFO L158 Benchmark]: TraceAbstraction took 703858.25ms. Allocated memory was 358.6MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 306.8MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2022-01-18 16:32:08,742 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 0.13ms. Allocated memory is still 358.6MB. Free memory is still 321.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.81ms. Allocated memory is still 358.6MB. Free memory was 320.0MB in the beginning and 318.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.68ms. Allocated memory is still 358.6MB. Free memory was 318.4MB in the beginning and 317.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 267.96ms. Allocated memory is still 358.6MB. Free memory was 317.4MB in the beginning and 307.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 703858.25ms. Allocated memory was 358.6MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 306.8MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (58929states) and FLOYD_HOARE automaton (currently 74 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 112 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (58929states) and FLOYD_HOARE automaton (currently 74 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 112 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (58929states) and FLOYD_HOARE automaton (currently 74 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 112 known predicates. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (58929states) and FLOYD_HOARE automaton (currently 74 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 112 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 703.7s, OverallIterations: 167, TraceHistogramMax: 3, PathProgramHistogramMax: 159, EmptinessCheckTime: 4.9s, AutomataDifference: 388.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 90975 SdHoareTripleChecker+Valid, 163.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90975 mSDsluCounter, 333431 SdHoareTripleChecker+Invalid, 136.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13658 IncrementalHoareTripleChecker+Unchecked, 441686 mSDsCounter, 11080 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 437298 IncrementalHoareTripleChecker+Invalid, 462036 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11080 mSolverCounterUnsat, 19903 mSDtfsCounter, 437298 mSolverCounterSat, 1.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23878 GetRequests, 10713 SyntacticMatches, 981 SemanticMatches, 12183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299221 ImplicationChecksByTransitivity, 285.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59754occurred in iteration=161, InterpolantAutomatonStates: 9000, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 63.1s AutomataMinimizationTime, 166 MinimizatonAttempts, 1448243 StatesRemovedByMinimization, 162 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 206.6s InterpolantComputationTime, 14730 NumberOfCodeBlocks, 14709 NumberOfCodeBlocksAsserted, 526 NumberOfCheckSat, 21510 ConstructedInterpolants, 107 QuantifiedInterpolants, 280807 SizeOfPredicates, 2204 NumberOfNonLiveVariables, 17697 ConjunctsInSsa, 5017 ConjunctsInUnsatCore, 492 InterpolantComputations, 5 PerfectInterpolantSequences, 1911/9745 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown