/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:26:15,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:26:15,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:26:15,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:26:15,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-28 15:26:15,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:26:15,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:26:15,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:26:15,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:26:15,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:26:15,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:26:15,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:26:15,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:26:15,906 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:26:15,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:26:15,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:26:15,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:26:15,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:26:15,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:26:15,909 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:26:15,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:26:15,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:26:16,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:26:16,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:26:16,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:26:16,129 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:26:16,130 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:26:16,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2022-01-28 15:26:16,131 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2022-01-28 15:26:16,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:26:16,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:26:16,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:26:16,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:26:16,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:26:16,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,190 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:26:16,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:26:16,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:26:16,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:26:16,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:26:16,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:26:16,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:26:16,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:26:16,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:26:16,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/1) ... [2022-01-28 15:26:16,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:26:16,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:16,241 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) [2022-01-28 15:26:16,261 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 [2022-01-28 15:26:16,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:26:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:26:16,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:26:16,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:26:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:26:16,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:26:16,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:26:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:26:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:26:16,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:26:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:26:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:26:16,275 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:26:16,311 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:26:16,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:26:16,392 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:26:16,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:26:16,402 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:26:16,403 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:26:16 BoogieIcfgContainer [2022-01-28 15:26:16,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:26:16,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:26:16,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:26:16,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:26:16,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:26:16" (1/2) ... [2022-01-28 15:26:16,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f896354 and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:26:16, skipping insertion in model container [2022-01-28 15:26:16,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:26:16" (2/2) ... [2022-01-28 15:26:16,414 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2022-01-28 15:26:16,417 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:26:16,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:26:16,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:26:16,418 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:26:16,453 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 15:26:16,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:26:16,500 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 [2022-01-28 15:26:16,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 15:26:16,506 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-01-28 15:26:16,545 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 15:26:16,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:16,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:16,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 437584313, now seen corresponding path program 1 times [2022-01-28 15:26:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491746387] [2022-01-28 15:26:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:16,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:16,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491746387] [2022-01-28 15:26:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491746387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:26:16,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:26:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:26:16,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255966009] [2022-01-28 15:26:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:26:16,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:26:16,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:26:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:26:16,828 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:16,929 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-01-28 15:26:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:26:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 15:26:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:16,946 INFO L225 Difference]: With dead ends: 257 [2022-01-28 15:26:16,946 INFO L226 Difference]: Without dead ends: 230 [2022-01-28 15:26:16,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:26:16,950 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:16,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:26:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-28 15:26:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-01-28 15:26:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-01-28 15:26:17,012 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-01-28 15:26:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:17,013 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-01-28 15:26:17,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-01-28 15:26:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 15:26:17,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:17,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:17,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:26:17,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -760695079, now seen corresponding path program 1 times [2022-01-28 15:26:17,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469111634] [2022-01-28 15:26:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:17,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469111634] [2022-01-28 15:26:17,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469111634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:17,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357363885] [2022-01-28 15:26:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:17,090 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) [2022-01-28 15:26:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:26:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:26:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357363885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:17,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:17,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 15:26:17,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14729653] [2022-01-28 15:26:17,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:26:17,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:26:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:26:17,220 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:17,300 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2022-01-28 15:26:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:26:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 15:26:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:17,303 INFO L225 Difference]: With dead ends: 376 [2022-01-28 15:26:17,303 INFO L226 Difference]: Without dead ends: 376 [2022-01-28 15:26:17,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:26:17,305 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:17,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:26:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-28 15:26:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2022-01-28 15:26:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2022-01-28 15:26:17,318 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2022-01-28 15:26:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:17,319 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2022-01-28 15:26:17,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2022-01-28 15:26:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 15:26:17,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:17,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:17,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:17,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:17,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 663812563, now seen corresponding path program 2 times [2022-01-28 15:26:17,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444427695] [2022-01-28 15:26:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444427695] [2022-01-28 15:26:17,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444427695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:26:17,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:26:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:26:17,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543980273] [2022-01-28 15:26:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:26:17,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:26:17,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:26:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:26:17,575 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:17,623 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2022-01-28 15:26:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:26:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 15:26:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:17,625 INFO L225 Difference]: With dead ends: 221 [2022-01-28 15:26:17,627 INFO L226 Difference]: Without dead ends: 190 [2022-01-28 15:26:17,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:26:17,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:17,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:26:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-28 15:26:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2022-01-28 15:26:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2022-01-28 15:26:17,647 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2022-01-28 15:26:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:17,647 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2022-01-28 15:26:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2022-01-28 15:26:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:26:17,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:17,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:17,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:26:17,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 132805511, now seen corresponding path program 1 times [2022-01-28 15:26:17,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206443077] [2022-01-28 15:26:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206443077] [2022-01-28 15:26:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206443077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:26:17,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:26:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:26:17,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456456384] [2022-01-28 15:26:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:26:17,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:26:17,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:26:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:26:17,673 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:17,689 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2022-01-28 15:26:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:26:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:26:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:17,690 INFO L225 Difference]: With dead ends: 239 [2022-01-28 15:26:17,690 INFO L226 Difference]: Without dead ends: 203 [2022-01-28 15:26:17,691 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 [2022-01-28 15:26:17,691 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:17,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:26:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-28 15:26:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-01-28 15:26:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-01-28 15:26:17,698 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2022-01-28 15:26:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:17,698 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-01-28 15:26:17,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-01-28 15:26:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:26:17,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:17,700 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] [2022-01-28 15:26:17,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 15:26:17,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1705332901, now seen corresponding path program 1 times [2022-01-28 15:26:17,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:17,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80551289] [2022-01-28 15:26:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80551289] [2022-01-28 15:26:17,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80551289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812166929] [2022-01-28 15:26:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:17,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:17,766 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) [2022-01-28 15:26:17,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:26:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:26:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812166929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:17,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:17,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 15:26:17,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198326474] [2022-01-28 15:26:17,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:26:17,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:26:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:26:17,913 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:17,978 INFO L93 Difference]: Finished difference Result 263 states and 798 transitions. [2022-01-28 15:26:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:26:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:26:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:17,981 INFO L225 Difference]: With dead ends: 263 [2022-01-28 15:26:17,981 INFO L226 Difference]: Without dead ends: 263 [2022-01-28 15:26:17,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:26:17,986 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:17,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:26:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-28 15:26:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2022-01-28 15:26:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-01-28 15:26:18,001 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-01-28 15:26:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:18,001 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-01-28 15:26:18,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-01-28 15:26:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:26:18,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:18,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:18,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:18,203 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 946505877, now seen corresponding path program 1 times [2022-01-28 15:26:18,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158497810] [2022-01-28 15:26:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:18,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:18,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158497810] [2022-01-28 15:26:18,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158497810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:18,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638886432] [2022-01-28 15:26:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:18,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:18,352 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) [2022-01-28 15:26:18,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:26:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:18,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:26:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:18,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-28 15:26:18,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-01-28 15:26:18,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:26:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:18,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:18,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-01-28 15:26:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:18,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-01-28 15:26:18,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-28 15:26:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638886432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:18,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:18,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:26:18,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534078409] [2022-01-28 15:26:18,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:26:18,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:26:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:26:18,976 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:19,205 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2022-01-28 15:26:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:26:19,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:26:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:19,207 INFO L225 Difference]: With dead ends: 425 [2022-01-28 15:26:19,208 INFO L226 Difference]: Without dead ends: 398 [2022-01-28 15:26:19,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:26:19,208 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:19,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:26:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-28 15:26:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 294. [2022-01-28 15:26:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2022-01-28 15:26:19,216 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2022-01-28 15:26:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:19,216 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2022-01-28 15:26:19,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2022-01-28 15:26:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:26:19,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:19,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:19,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:19,439 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 [2022-01-28 15:26:19,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 615894917, now seen corresponding path program 2 times [2022-01-28 15:26:19,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829848730] [2022-01-28 15:26:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:19,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829848730] [2022-01-28 15:26:19,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829848730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073242105] [2022-01-28 15:26:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:26:19,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:19,576 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) [2022-01-28 15:26:19,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:26:19,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:26:19,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:26:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:19,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-28 15:26:19,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-01-28 15:26:19,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:26:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:19,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:19,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-01-28 15:26:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:20,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:20,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-01-28 15:26:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-28 15:26:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:20,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073242105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:20,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:20,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:26:20,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362831724] [2022-01-28 15:26:20,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:20,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:26:20,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:26:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:26:20,096 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:20,941 INFO L93 Difference]: Finished difference Result 820 states and 2540 transitions. [2022-01-28 15:26:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:26:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:26:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:20,947 INFO L225 Difference]: With dead ends: 820 [2022-01-28 15:26:20,947 INFO L226 Difference]: Without dead ends: 793 [2022-01-28 15:26:20,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:26:20,948 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:20,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 135 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:26:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-28 15:26:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 314. [2022-01-28 15:26:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-01-28 15:26:20,958 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-01-28 15:26:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:20,958 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-01-28 15:26:20,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-01-28 15:26:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:26:20,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:20,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:20,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:21,184 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 [2022-01-28 15:26:21,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1351743519, now seen corresponding path program 3 times [2022-01-28 15:26:21,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:21,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346108065] [2022-01-28 15:26:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:21,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346108065] [2022-01-28 15:26:21,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346108065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53713044] [2022-01-28 15:26:21,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:26:21,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:21,308 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) [2022-01-28 15:26:21,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:26:21,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:26:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:26:21,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:26:21,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 15:26:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:26:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:21,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:21,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:21,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-01-28 15:26:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-01-28 15:26:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:26:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:21,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53713044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:21,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:21,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:26:21,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699096523] [2022-01-28 15:26:21,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:21,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:26:21,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:26:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:26:21,852 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:22,222 INFO L93 Difference]: Finished difference Result 582 states and 1803 transitions. [2022-01-28 15:26:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:26:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:26:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:22,226 INFO L225 Difference]: With dead ends: 582 [2022-01-28 15:26:22,226 INFO L226 Difference]: Without dead ends: 555 [2022-01-28 15:26:22,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:26:22,227 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:22,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 102 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:26:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-28 15:26:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 366. [2022-01-28 15:26:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-01-28 15:26:22,235 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-01-28 15:26:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-01-28 15:26:22,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-01-28 15:26:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:26:22,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:22,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:22,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:22,452 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 [2022-01-28 15:26:22,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash -68708093, now seen corresponding path program 4 times [2022-01-28 15:26:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680590168] [2022-01-28 15:26:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:22,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:22,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680590168] [2022-01-28 15:26:22,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680590168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503163861] [2022-01-28 15:26:22,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:26:22,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:22,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:22,566 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) [2022-01-28 15:26:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:26:22,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:26:22,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:26:22,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:22,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:26:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 15:26:22,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:26:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:22,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:22,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-01-28 15:26:22,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-01-28 15:26:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:26:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503163861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:23,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:23,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:26:23,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274033222] [2022-01-28 15:26:23,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:26:23,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:26:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:26:23,104 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:23,774 INFO L93 Difference]: Finished difference Result 1010 states and 3145 transitions. [2022-01-28 15:26:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:26:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:26:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:23,778 INFO L225 Difference]: With dead ends: 1010 [2022-01-28 15:26:23,778 INFO L226 Difference]: Without dead ends: 956 [2022-01-28 15:26:23,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:26:23,780 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 193 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 109 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:26:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-28 15:26:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 406. [2022-01-28 15:26:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1703703703703705) internal successors, (1284), 405 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1284 transitions. [2022-01-28 15:26:23,792 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1284 transitions. Word has length 23 [2022-01-28 15:26:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1284 transitions. [2022-01-28 15:26:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1284 transitions. [2022-01-28 15:26:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:23,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:23,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:23,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:24,012 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 [2022-01-28 15:26:24,013 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:24,014 INFO L85 PathProgramCache]: Analyzing trace with hash 784698867, now seen corresponding path program 5 times [2022-01-28 15:26:24,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:24,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225371239] [2022-01-28 15:26:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:24,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:24,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225371239] [2022-01-28 15:26:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225371239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515617656] [2022-01-28 15:26:24,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:26:24,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:24,051 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) [2022-01-28 15:26:24,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:26:24,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:26:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:26:24,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:24,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515617656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:24,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:24,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 15:26:24,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535553092] [2022-01-28 15:26:24,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:24,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:26:24,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:26:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:26:24,193 INFO L87 Difference]: Start difference. First operand 406 states and 1284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:24,305 INFO L93 Difference]: Finished difference Result 909 states and 2785 transitions. [2022-01-28 15:26:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:26:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:24,309 INFO L225 Difference]: With dead ends: 909 [2022-01-28 15:26:24,309 INFO L226 Difference]: Without dead ends: 909 [2022-01-28 15:26:24,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:26:24,309 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:24,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:26:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-28 15:26:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 460. [2022-01-28 15:26:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2022-01-28 15:26:24,322 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2022-01-28 15:26:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:24,322 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2022-01-28 15:26:24,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2022-01-28 15:26:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:24,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:24,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:24,537 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 [2022-01-28 15:26:24,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash -817798605, now seen corresponding path program 6 times [2022-01-28 15:26:24,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498987201] [2022-01-28 15:26:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:24,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:24,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498987201] [2022-01-28 15:26:24,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498987201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893203878] [2022-01-28 15:26:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:26:24,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:24,588 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) [2022-01-28 15:26:24,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:26:24,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:26:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:24,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:26:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893203878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:24,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:24,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-28 15:26:24,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452220872] [2022-01-28 15:26:24,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:24,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:26:24,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:26:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:26:24,721 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:25,620 INFO L93 Difference]: Finished difference Result 2206 states and 6830 transitions. [2022-01-28 15:26:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:26:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:25,628 INFO L225 Difference]: With dead ends: 2206 [2022-01-28 15:26:25,629 INFO L226 Difference]: Without dead ends: 2206 [2022-01-28 15:26:25,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 15:26:25,630 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 440 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:25,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 125 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:26:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-01-28 15:26:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 841. [2022-01-28 15:26:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.5) internal successors, (2940), 840 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2940 transitions. [2022-01-28 15:26:25,656 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2940 transitions. Word has length 25 [2022-01-28 15:26:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:25,656 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2940 transitions. [2022-01-28 15:26:25,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2940 transitions. [2022-01-28 15:26:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:25,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:25,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:25,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:25,875 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 [2022-01-28 15:26:25,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash 136398371, now seen corresponding path program 7 times [2022-01-28 15:26:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:25,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15107573] [2022-01-28 15:26:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:25,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:25,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15107573] [2022-01-28 15:26:25,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15107573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622019153] [2022-01-28 15:26:25,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:26:25,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:25,914 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) [2022-01-28 15:26:25,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:26:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:26:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622019153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:26,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 15:26:26,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658592950] [2022-01-28 15:26:26,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:26:26,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:26:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:26:26,031 INFO L87 Difference]: Start difference. First operand 841 states and 2940 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:26,112 INFO L93 Difference]: Finished difference Result 1241 states and 4180 transitions. [2022-01-28 15:26:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 15:26:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:26,117 INFO L225 Difference]: With dead ends: 1241 [2022-01-28 15:26:26,117 INFO L226 Difference]: Without dead ends: 1235 [2022-01-28 15:26:26,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:26:26,118 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:26,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:26:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-01-28 15:26:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 840. [2022-01-28 15:26:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.4803337306317044) internal successors, (2920), 839 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2920 transitions. [2022-01-28 15:26:26,136 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2920 transitions. Word has length 25 [2022-01-28 15:26:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:26,137 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2920 transitions. [2022-01-28 15:26:26,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2920 transitions. [2022-01-28 15:26:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:26:26,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:26,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:26,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-28 15:26:26,370 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 [2022-01-28 15:26:26,370 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1382698947, now seen corresponding path program 8 times [2022-01-28 15:26:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811782295] [2022-01-28 15:26:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:26,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:26,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811782295] [2022-01-28 15:26:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811782295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253246011] [2022-01-28 15:26:26,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:26:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:26,424 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) [2022-01-28 15:26:26,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:26:26,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:26:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:26,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:26:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:26,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:26,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253246011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:26,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:26,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-28 15:26:26,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652761170] [2022-01-28 15:26:26,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:26,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:26:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:26:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:26:26,561 INFO L87 Difference]: Start difference. First operand 840 states and 2920 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:26,925 INFO L93 Difference]: Finished difference Result 2629 states and 9167 transitions. [2022-01-28 15:26:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:26:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:26:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:26,936 INFO L225 Difference]: With dead ends: 2629 [2022-01-28 15:26:26,936 INFO L226 Difference]: Without dead ends: 2587 [2022-01-28 15:26:26,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:26:26,937 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:26,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:26:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-01-28 15:26:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1338. [2022-01-28 15:26:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.6738967838444276) internal successors, (4912), 1337 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4912 transitions. [2022-01-28 15:26:26,972 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4912 transitions. Word has length 25 [2022-01-28 15:26:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:26,972 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4912 transitions. [2022-01-28 15:26:26,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4912 transitions. [2022-01-28 15:26:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:26:26,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:26,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:26,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:27,191 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 [2022-01-28 15:26:27,191 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:27,191 INFO L85 PathProgramCache]: Analyzing trace with hash 849469189, now seen corresponding path program 9 times [2022-01-28 15:26:27,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:27,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836088491] [2022-01-28 15:26:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:27,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:27,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836088491] [2022-01-28 15:26:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836088491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932919399] [2022-01-28 15:26:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:26:27,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:27,216 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) [2022-01-28 15:26:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:26:27,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:26:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:26:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:27,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:27,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932919399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:27,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:27,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-28 15:26:27,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374572120] [2022-01-28 15:26:27,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:26:27,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:26:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:26:27,332 INFO L87 Difference]: Start difference. First operand 1338 states and 4912 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:27,655 INFO L93 Difference]: Finished difference Result 2926 states and 9834 transitions. [2022-01-28 15:26:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 15:26:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:26:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:27,666 INFO L225 Difference]: With dead ends: 2926 [2022-01-28 15:26:27,666 INFO L226 Difference]: Without dead ends: 2537 [2022-01-28 15:26:27,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:26:27,667 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:27,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:26:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-28 15:26:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1717. [2022-01-28 15:26:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2022-01-28 15:26:27,727 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2022-01-28 15:26:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:27,727 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2022-01-28 15:26:27,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2022-01-28 15:26:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:26:27,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:27,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:27,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:27,947 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 [2022-01-28 15:26:27,948 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1971117019, now seen corresponding path program 10 times [2022-01-28 15:26:27,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342392981] [2022-01-28 15:26:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:27,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:27,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342392981] [2022-01-28 15:26:27,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342392981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226959109] [2022-01-28 15:26:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:26:27,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:27,991 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) [2022-01-28 15:26:28,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:26:28,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:26:28,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:26:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:28,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:26:28,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226959109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:28,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:28,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-28 15:26:28,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398309306] [2022-01-28 15:26:28,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:26:28,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:26:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:26:28,134 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:28,612 INFO L93 Difference]: Finished difference Result 7005 states and 23425 transitions. [2022-01-28 15:26:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 15:26:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 15:26:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:28,636 INFO L225 Difference]: With dead ends: 7005 [2022-01-28 15:26:28,636 INFO L226 Difference]: Without dead ends: 6920 [2022-01-28 15:26:28,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:26:28,637 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 308 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:28,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 128 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:26:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2022-01-28 15:26:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 3961. [2022-01-28 15:26:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 3.6626262626262625) internal successors, (14504), 3960 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 14504 transitions. [2022-01-28 15:26:28,773 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 14504 transitions. Word has length 28 [2022-01-28 15:26:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:28,773 INFO L470 AbstractCegarLoop]: Abstraction has 3961 states and 14504 transitions. [2022-01-28 15:26:28,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 14504 transitions. [2022-01-28 15:26:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:26:28,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:28,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:28,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:28,998 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 [2022-01-28 15:26:28,998 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -191772803, now seen corresponding path program 11 times [2022-01-28 15:26:28,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922785732] [2022-01-28 15:26:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:28,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:29,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922785732] [2022-01-28 15:26:29,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922785732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307380777] [2022-01-28 15:26:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:26:29,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:29,027 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) [2022-01-28 15:26:29,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:26:29,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:26:29,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:26:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:29,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307380777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:29,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:29,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 8 [2022-01-28 15:26:29,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432146159] [2022-01-28 15:26:29,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:29,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:26:29,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:26:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:26:29,209 INFO L87 Difference]: Start difference. First operand 3961 states and 14504 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:29,435 INFO L93 Difference]: Finished difference Result 7306 states and 25843 transitions. [2022-01-28 15:26:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:26:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 15:26:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:29,455 INFO L225 Difference]: With dead ends: 7306 [2022-01-28 15:26:29,455 INFO L226 Difference]: Without dead ends: 7222 [2022-01-28 15:26:29,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:26:29,459 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:29,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 75 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:26:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2022-01-28 15:26:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 5516. [2022-01-28 15:26:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.7071622846781507) internal successors, (20445), 5515 states have internal predecessors, (20445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 20445 transitions. [2022-01-28 15:26:29,642 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 20445 transitions. Word has length 28 [2022-01-28 15:26:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:29,643 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 20445 transitions. [2022-01-28 15:26:29,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 20445 transitions. [2022-01-28 15:26:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-28 15:26:29,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:29,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:29,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-28 15:26:29,867 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 [2022-01-28 15:26:29,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -489727391, now seen corresponding path program 12 times [2022-01-28 15:26:29,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903387633] [2022-01-28 15:26:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:29,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:29,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903387633] [2022-01-28 15:26:29,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903387633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409800002] [2022-01-28 15:26:29,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:26:29,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:29,897 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) [2022-01-28 15:26:29,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:26:29,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:26:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:26:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:30,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409800002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:30,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:30,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-28 15:26:30,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502308809] [2022-01-28 15:26:30,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:30,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:26:30,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:26:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:26:30,010 INFO L87 Difference]: Start difference. First operand 5516 states and 20445 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:30,323 INFO L93 Difference]: Finished difference Result 8819 states and 29845 transitions. [2022-01-28 15:26:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:26:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-28 15:26:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:30,383 INFO L225 Difference]: With dead ends: 8819 [2022-01-28 15:26:30,383 INFO L226 Difference]: Without dead ends: 8707 [2022-01-28 15:26:30,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:26:30,384 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:30,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 143 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:26:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2022-01-28 15:26:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 6491. [2022-01-28 15:26:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6490 states have (on average 3.6280431432973805) internal successors, (23546), 6490 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 23546 transitions. [2022-01-28 15:26:30,535 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 23546 transitions. Word has length 28 [2022-01-28 15:26:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 6491 states and 23546 transitions. [2022-01-28 15:26:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 23546 transitions. [2022-01-28 15:26:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:30,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:30,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:30,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-28 15:26:30,763 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 [2022-01-28 15:26:30,763 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -655766583, now seen corresponding path program 13 times [2022-01-28 15:26:30,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806378494] [2022-01-28 15:26:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:30,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:31,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806378494] [2022-01-28 15:26:31,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806378494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490143904] [2022-01-28 15:26:31,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:26:31,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:31,145 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) [2022-01-28 15:26:31,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:26:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:26:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:31,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:26:31,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:31,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-28 15:26:31,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-28 15:26:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:26:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:31,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:31,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:26:31,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 458 treesize of output 426 [2022-01-28 15:26:31,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:31,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:32,014 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:26:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:26:32,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:32,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:32,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:26:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:32,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490143904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:32,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:32,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-28 15:26:32,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946742255] [2022-01-28 15:26:32,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:32,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:26:32,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:26:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:26:32,168 INFO L87 Difference]: Start difference. First operand 6491 states and 23546 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:34,031 INFO L93 Difference]: Finished difference Result 13830 states and 48778 transitions. [2022-01-28 15:26:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 15:26:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:26:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:34,093 INFO L225 Difference]: With dead ends: 13830 [2022-01-28 15:26:34,093 INFO L226 Difference]: Without dead ends: 13788 [2022-01-28 15:26:34,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:26:34,094 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 294 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:34,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 357 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:26:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2022-01-28 15:26:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 6636. [2022-01-28 15:26:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.619894498869631) internal successors, (24018), 6635 states have internal predecessors, (24018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 24018 transitions. [2022-01-28 15:26:34,290 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 24018 transitions. Word has length 30 [2022-01-28 15:26:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:34,290 INFO L470 AbstractCegarLoop]: Abstraction has 6636 states and 24018 transitions. [2022-01-28 15:26:34,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 24018 transitions. [2022-01-28 15:26:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:34,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:34,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:34,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-28 15:26:34,520 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 [2022-01-28 15:26:34,520 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2048908809, now seen corresponding path program 14 times [2022-01-28 15:26:34,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:34,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821126799] [2022-01-28 15:26:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:34,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:34,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821126799] [2022-01-28 15:26:34,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821126799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318588091] [2022-01-28 15:26:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:26:34,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:34,885 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) [2022-01-28 15:26:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:26:34,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:26:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:26:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:26:35,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:26:35,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:26:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:26:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:35,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:35,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:26:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:26:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:36,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:36,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:36,412 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:26:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:26:36,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:26:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318588091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:36,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:36,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-01-28 15:26:36,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138609670] [2022-01-28 15:26:36,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:36,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:26:36,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:26:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:26:36,543 INFO L87 Difference]: Start difference. First operand 6636 states and 24018 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:38,818 INFO L93 Difference]: Finished difference Result 13741 states and 48255 transitions. [2022-01-28 15:26:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:26:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:26:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:38,852 INFO L225 Difference]: With dead ends: 13741 [2022-01-28 15:26:38,852 INFO L226 Difference]: Without dead ends: 13699 [2022-01-28 15:26:38,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:26:38,854 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:38,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 353 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:26:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13699 states. [2022-01-28 15:26:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13699 to 6695. [2022-01-28 15:26:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 3.6118912458918433) internal successors, (24178), 6694 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 24178 transitions. [2022-01-28 15:26:39,018 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 24178 transitions. Word has length 30 [2022-01-28 15:26:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:39,019 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 24178 transitions. [2022-01-28 15:26:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 24178 transitions. [2022-01-28 15:26:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:39,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:39,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:39,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:39,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:39,293 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1054839645, now seen corresponding path program 15 times [2022-01-28 15:26:39,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:39,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019979860] [2022-01-28 15:26:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:39,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:39,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019979860] [2022-01-28 15:26:39,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019979860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798188040] [2022-01-28 15:26:39,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:26:39,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:39,531 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) [2022-01-28 15:26:39,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:26:39,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:26:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:26:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:26:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:26:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-28 15:26:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-28 15:26:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:40,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:40,345 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:26:40,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1866 treesize of output 1770 [2022-01-28 15:26:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:40,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:40,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:41,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:41,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:26:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:41,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:41,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:26:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798188040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:41,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:26:41,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800384893] [2022-01-28 15:26:41,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:26:41,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:26:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:26:41,232 INFO L87 Difference]: Start difference. First operand 6695 states and 24178 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:43,182 INFO L93 Difference]: Finished difference Result 16566 states and 56696 transitions. [2022-01-28 15:26:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:26:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:26:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:43,221 INFO L225 Difference]: With dead ends: 16566 [2022-01-28 15:26:43,221 INFO L226 Difference]: Without dead ends: 16482 [2022-01-28 15:26:43,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-01-28 15:26:43,222 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 356 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:43,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 285 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1296 Invalid, 0 Unknown, 260 Unchecked, 0.7s Time] [2022-01-28 15:26:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2022-01-28 15:26:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 7235. [2022-01-28 15:26:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 3.6300801769422173) internal successors, (26260), 7234 states have internal predecessors, (26260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 26260 transitions. [2022-01-28 15:26:43,415 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 26260 transitions. Word has length 30 [2022-01-28 15:26:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:43,416 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 26260 transitions. [2022-01-28 15:26:43,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 26260 transitions. [2022-01-28 15:26:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:43,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:43,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:43,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:43,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:43,639 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1811677887, now seen corresponding path program 16 times [2022-01-28 15:26:43,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:43,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724730616] [2022-01-28 15:26:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:43,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:43,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:43,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724730616] [2022-01-28 15:26:43,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724730616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:43,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217810392] [2022-01-28 15:26:43,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:26:43,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:43,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:43,936 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) [2022-01-28 15:26:43,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:26:43,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:26:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:26:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:26:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:44,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:44,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:26:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-01-28 15:26:44,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-01-28 15:26:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:44,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:44,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:26:44,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:26:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:45,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:45,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:45,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:45,703 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:26:45,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:26:45,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:45,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:26:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:45,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217810392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:45,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:45,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:26:45,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670399008] [2022-01-28 15:26:45,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:45,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:26:45,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:26:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:26:45,805 INFO L87 Difference]: Start difference. First operand 7235 states and 26260 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:46,679 INFO L93 Difference]: Finished difference Result 15739 states and 55669 transitions. [2022-01-28 15:26:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:26:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:26:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:46,718 INFO L225 Difference]: With dead ends: 15739 [2022-01-28 15:26:46,718 INFO L226 Difference]: Without dead ends: 15712 [2022-01-28 15:26:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:26:46,719 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 243 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1076 Invalid, 0 Unknown, 473 Unchecked, 0.5s Time] [2022-01-28 15:26:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15712 states. [2022-01-28 15:26:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15712 to 7238. [2022-01-28 15:26:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 7237 states have (on average 3.630233522177698) internal successors, (26272), 7237 states have internal predecessors, (26272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 26272 transitions. [2022-01-28 15:26:46,897 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 26272 transitions. Word has length 30 [2022-01-28 15:26:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:46,897 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 26272 transitions. [2022-01-28 15:26:46,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 26272 transitions. [2022-01-28 15:26:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:46,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:46,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:46,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:26:47,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:47,123 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1682132343, now seen corresponding path program 17 times [2022-01-28 15:26:47,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67017514] [2022-01-28 15:26:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:47,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:47,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67017514] [2022-01-28 15:26:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67017514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:47,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452790617] [2022-01-28 15:26:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:26:47,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:47,412 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) [2022-01-28 15:26:47,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:26:47,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:26:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-28 15:26:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:47,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:26:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:47,714 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:26:47,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-28 15:26:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:47,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:26:47,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:26:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:47,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:48,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:26:48,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:26:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:48,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:26:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:48,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452790617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:26:48,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:26:48,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-01-28 15:26:48,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915008925] [2022-01-28 15:26:48,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:26:48,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:26:48,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:26:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:26:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:26:48,437 INFO L87 Difference]: Start difference. First operand 7238 states and 26272 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:26:53,826 INFO L93 Difference]: Finished difference Result 11143 states and 38720 transitions. [2022-01-28 15:26:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-28 15:26:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:26:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:26:53,851 INFO L225 Difference]: With dead ends: 11143 [2022-01-28 15:26:53,851 INFO L226 Difference]: Without dead ends: 11059 [2022-01-28 15:26:53,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1414, Invalid=10358, Unknown=0, NotChecked=0, Total=11772 [2022-01-28 15:26:53,854 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 318 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:26:53,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 573 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2262 Invalid, 0 Unknown, 216 Unchecked, 1.3s Time] [2022-01-28 15:26:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11059 states. [2022-01-28 15:26:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11059 to 7638. [2022-01-28 15:26:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7638 states, 7637 states have (on average 3.646458033259133) internal successors, (27848), 7637 states have internal predecessors, (27848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7638 states to 7638 states and 27848 transitions. [2022-01-28 15:26:54,001 INFO L78 Accepts]: Start accepts. Automaton has 7638 states and 27848 transitions. Word has length 30 [2022-01-28 15:26:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:26:54,001 INFO L470 AbstractCegarLoop]: Abstraction has 7638 states and 27848 transitions. [2022-01-28 15:26:54,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:26:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7638 states and 27848 transitions. [2022-01-28 15:26:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:26:54,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:26:54,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:26:54,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-28 15:26:54,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:54,230 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:26:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:26:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1060251933, now seen corresponding path program 18 times [2022-01-28 15:26:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:26:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708231351] [2022-01-28 15:26:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:26:54,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:26:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:26:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:26:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708231351] [2022-01-28 15:26:54,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708231351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:26:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667086622] [2022-01-28 15:26:54,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:26:54,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:26:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:26:54,425 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) [2022-01-28 15:26:54,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:26:54,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:26:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:26:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:26:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:26:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:26:54,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:54,696 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:26:54,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-28 15:26:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:26:54,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:26:54,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:54,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2022-01-28 15:26:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:26:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:26:55,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:26:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1667 treesize of output 1612 [2022-01-28 15:27:01,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 8 [2022-01-28 15:27:01,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2022-01-28 15:27:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2022-01-28 15:27:01,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:01,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667086622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:01,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:01,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-28 15:27:01,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750402784] [2022-01-28 15:27:01,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:01,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:27:01,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:27:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:27:01,379 INFO L87 Difference]: Start difference. First operand 7638 states and 27848 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:05,272 INFO L93 Difference]: Finished difference Result 18582 states and 65753 transitions. [2022-01-28 15:27:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:27:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:05,333 INFO L225 Difference]: With dead ends: 18582 [2022-01-28 15:27:05,333 INFO L226 Difference]: Without dead ends: 18528 [2022-01-28 15:27:05,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=545, Invalid=3877, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 15:27:05,335 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:05,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 372 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 902 Invalid, 0 Unknown, 897 Unchecked, 0.4s Time] [2022-01-28 15:27:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18528 states. [2022-01-28 15:27:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18528 to 7683. [2022-01-28 15:27:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.6517833897422545) internal successors, (28053), 7682 states have internal predecessors, (28053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28053 transitions. [2022-01-28 15:27:05,586 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28053 transitions. Word has length 30 [2022-01-28 15:27:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:05,587 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 28053 transitions. [2022-01-28 15:27:05,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28053 transitions. [2022-01-28 15:27:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:05,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:05,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:05,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:05,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-28 15:27:05,816 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1321740765, now seen corresponding path program 19 times [2022-01-28 15:27:05,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:05,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858533704] [2022-01-28 15:27:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:05,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:06,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858533704] [2022-01-28 15:27:06,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858533704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555202395] [2022-01-28 15:27:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:27:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:06,035 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) [2022-01-28 15:27:06,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:27:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:27:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:06,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:27:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:06,354 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:27:06,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-28 15:27:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:06,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:27:06,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:27:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:06,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:06,703 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:27:06,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:27:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:07,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:07,063 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:27:07,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:27:07,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:07,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:07,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555202395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:07,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:07,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-28 15:27:07,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682125355] [2022-01-28 15:27:07,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:07,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:27:07,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:27:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:27:07,179 INFO L87 Difference]: Start difference. First operand 7683 states and 28053 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:10,468 INFO L93 Difference]: Finished difference Result 19248 states and 66888 transitions. [2022-01-28 15:27:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:27:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:10,531 INFO L225 Difference]: With dead ends: 19248 [2022-01-28 15:27:10,532 INFO L226 Difference]: Without dead ends: 19215 [2022-01-28 15:27:10,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 15:27:10,533 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 259 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:10,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 434 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2393 Invalid, 0 Unknown, 93 Unchecked, 1.1s Time] [2022-01-28 15:27:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19215 states. [2022-01-28 15:27:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19215 to 7708. [2022-01-28 15:27:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.6522641754249383) internal successors, (28148), 7707 states have internal predecessors, (28148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 28148 transitions. [2022-01-28 15:27:10,790 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 28148 transitions. Word has length 30 [2022-01-28 15:27:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:10,790 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 28148 transitions. [2022-01-28 15:27:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 28148 transitions. [2022-01-28 15:27:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:10,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:10,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:10,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:11,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-28 15:27:11,020 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:11,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash -577320523, now seen corresponding path program 20 times [2022-01-28 15:27:11,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628268768] [2022-01-28 15:27:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:11,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:11,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628268768] [2022-01-28 15:27:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628268768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486426957] [2022-01-28 15:27:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:27:11,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:11,227 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) [2022-01-28 15:27:11,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 15:27:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:27:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:27:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:11,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:27:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:11,537 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:27:11,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-28 15:27:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:11,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:27:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:27:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:11,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:27:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:12,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:12,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:27:12,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:12,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:12,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:12,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:12,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486426957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:12,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:12,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:27:12,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370161373] [2022-01-28 15:27:12,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:12,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:27:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:27:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:27:12,384 INFO L87 Difference]: Start difference. First operand 7708 states and 28148 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:13,297 INFO L93 Difference]: Finished difference Result 12582 states and 45616 transitions. [2022-01-28 15:27:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:27:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:13,332 INFO L225 Difference]: With dead ends: 12582 [2022-01-28 15:27:13,333 INFO L226 Difference]: Without dead ends: 12528 [2022-01-28 15:27:13,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:27:13,334 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:13,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 193 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1224 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-01-28 15:27:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2022-01-28 15:27:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 8262. [2022-01-28 15:27:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8262 states, 8261 states have (on average 3.669894685873381) internal successors, (30317), 8261 states have internal predecessors, (30317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8262 states to 8262 states and 30317 transitions. [2022-01-28 15:27:13,528 INFO L78 Accepts]: Start accepts. Automaton has 8262 states and 30317 transitions. Word has length 30 [2022-01-28 15:27:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 8262 states and 30317 transitions. [2022-01-28 15:27:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8262 states and 30317 transitions. [2022-01-28 15:27:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:13,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:13,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:13,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:13,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:13,753 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2027651609, now seen corresponding path program 21 times [2022-01-28 15:27:13,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321695234] [2022-01-28 15:27:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:13,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:13,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321695234] [2022-01-28 15:27:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321695234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80500081] [2022-01-28 15:27:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:27:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:14,002 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) [2022-01-28 15:27:14,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 15:27:14,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:27:14,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:27:14,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:14,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:27:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:14,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:14,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-01-28 15:27:14,343 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-28 15:27:14,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:27:14,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:14,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-01-28 15:27:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:15,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:15,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:15,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-28 15:27:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:15,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:15,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-28 15:27:15,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:15,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:15,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-01-28 15:27:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:16,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:16,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-01-28 15:27:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:16,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80500081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:16,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:16,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-01-28 15:27:16,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337441501] [2022-01-28 15:27:16,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:16,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:27:16,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:27:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:27:16,120 INFO L87 Difference]: Start difference. First operand 8262 states and 30317 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:21,818 INFO L93 Difference]: Finished difference Result 22020 states and 77830 transitions. [2022-01-28 15:27:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-28 15:27:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:21,881 INFO L225 Difference]: With dead ends: 22020 [2022-01-28 15:27:21,881 INFO L226 Difference]: Without dead ends: 21882 [2022-01-28 15:27:21,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2319, Invalid=12443, Unknown=0, NotChecked=0, Total=14762 [2022-01-28 15:27:21,885 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 541 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2646 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:21,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 621 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 920 Invalid, 0 Unknown, 2646 Unchecked, 0.5s Time] [2022-01-28 15:27:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2022-01-28 15:27:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 8357. [2022-01-28 15:27:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.669100047869794) internal successors, (30659), 8356 states have internal predecessors, (30659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 30659 transitions. [2022-01-28 15:27:22,173 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 30659 transitions. Word has length 30 [2022-01-28 15:27:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:22,173 INFO L470 AbstractCegarLoop]: Abstraction has 8357 states and 30659 transitions. [2022-01-28 15:27:22,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 30659 transitions. [2022-01-28 15:27:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:22,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:22,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:22,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:22,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:22,393 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2089941737, now seen corresponding path program 22 times [2022-01-28 15:27:22,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:22,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245464697] [2022-01-28 15:27:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:22,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:22,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245464697] [2022-01-28 15:27:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245464697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697483461] [2022-01-28 15:27:22,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:27:22,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:22,638 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) [2022-01-28 15:27:22,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 15:27:22,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:27:22,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:27:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:27:22,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:22,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:22,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:27:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-01-28 15:27:23,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-01-28 15:27:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:23,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:23,292 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:27:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:27:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:23,675 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:27:23,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:27:23,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:23,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:23,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:23,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697483461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:23,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:27:23,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018344300] [2022-01-28 15:27:23,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:23,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:27:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:27:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:27:23,745 INFO L87 Difference]: Start difference. First operand 8357 states and 30659 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:24,737 INFO L93 Difference]: Finished difference Result 13897 states and 50065 transitions. [2022-01-28 15:27:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:27:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:24,769 INFO L225 Difference]: With dead ends: 13897 [2022-01-28 15:27:24,769 INFO L226 Difference]: Without dead ends: 13868 [2022-01-28 15:27:24,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:27:24,769 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:24,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 253 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1385 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-01-28 15:27:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13868 states. [2022-01-28 15:27:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13868 to 8326. [2022-01-28 15:27:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 3.669069069069069) internal successors, (30545), 8325 states have internal predecessors, (30545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 30545 transitions. [2022-01-28 15:27:24,935 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 30545 transitions. Word has length 30 [2022-01-28 15:27:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:24,936 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 30545 transitions. [2022-01-28 15:27:24,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 30545 transitions. [2022-01-28 15:27:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:24,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:24,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:24,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 15:27:25,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-28 15:27:25,163 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2003223385, now seen corresponding path program 23 times [2022-01-28 15:27:25,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:25,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044030942] [2022-01-28 15:27:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:25,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:25,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:25,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044030942] [2022-01-28 15:27:25,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044030942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:25,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443655677] [2022-01-28 15:27:25,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:27:25,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:25,429 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) [2022-01-28 15:27:25,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 15:27:25,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:27:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:27:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:25,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:27:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:25,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:25,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 15:27:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:25,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2022-01-28 15:27:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:25,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:25,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:27:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:26,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:26,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:26,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 831 treesize of output 767 [2022-01-28 15:27:26,747 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:27:26,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 69 [2022-01-28 15:27:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:27,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443655677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:27,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:27,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-01-28 15:27:27,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797306091] [2022-01-28 15:27:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:27,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:27:27,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:27:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:27:27,050 INFO L87 Difference]: Start difference. First operand 8326 states and 30545 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 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) [2022-01-28 15:27:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:27:28,085 INFO L93 Difference]: Finished difference Result 15998 states and 56978 transitions. [2022-01-28 15:27:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:27:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:27:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:27:28,131 INFO L225 Difference]: With dead ends: 15998 [2022-01-28 15:27:28,131 INFO L226 Difference]: Without dead ends: 15968 [2022-01-28 15:27:28,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 15:27:28,132 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:27:28,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 365 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 637 Invalid, 0 Unknown, 731 Unchecked, 0.4s Time] [2022-01-28 15:27:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15968 states. [2022-01-28 15:27:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15968 to 8425. [2022-01-28 15:27:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8425 states, 8424 states have (on average 3.6792497625830958) internal successors, (30994), 8424 states have internal predecessors, (30994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8425 states to 8425 states and 30994 transitions. [2022-01-28 15:27:28,406 INFO L78 Accepts]: Start accepts. Automaton has 8425 states and 30994 transitions. Word has length 30 [2022-01-28 15:27:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:27:28,406 INFO L470 AbstractCegarLoop]: Abstraction has 8425 states and 30994 transitions. [2022-01-28 15:27:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 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) [2022-01-28 15:27:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8425 states and 30994 transitions. [2022-01-28 15:27:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:27:28,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:27:28,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:27:28,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-28 15:27:28,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-28 15:27:28,636 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:27:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:27:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash -288523303, now seen corresponding path program 24 times [2022-01-28 15:27:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:27:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046517646] [2022-01-28 15:27:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:27:28,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:27:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:27:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:27:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046517646] [2022-01-28 15:27:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046517646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:27:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604515037] [2022-01-28 15:27:28,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:27:28,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:27:28,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:27:28,879 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) [2022-01-28 15:27:28,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 15:27:28,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:27:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:27:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:27:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:27:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:27:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:29,188 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:27:29,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-28 15:27:29,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-01-28 15:27:29,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:29,332 INFO L388 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 32 treesize of output 36 [2022-01-28 15:27:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:29,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:27:30,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:30,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 398 [2022-01-28 15:27:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:30,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 192 [2022-01-28 15:27:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:30,889 INFO L388 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 21 treesize of output 34 [2022-01-28 15:27:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:27:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:27:30,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:27:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:27:30,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:27:30,959 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-28 15:27:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:27:31,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604515037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:27:31,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:27:31,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-28 15:27:31,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948835194] [2022-01-28 15:27:31,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:27:31,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:27:31,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:27:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:27:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:27:31,050 INFO L87 Difference]: Start difference. First operand 8425 states and 30994 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:27:51,608 WARN L227 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:28:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:32,914 INFO L93 Difference]: Finished difference Result 23588 states and 83809 transitions. [2022-01-28 15:28:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-28 15:28:32,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:28:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:32,971 INFO L225 Difference]: With dead ends: 23588 [2022-01-28 15:28:32,971 INFO L226 Difference]: Without dead ends: 23558 [2022-01-28 15:28:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9490 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=2633, Invalid=23446, Unknown=3, NotChecked=0, Total=26082 [2022-01-28 15:28:32,974 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 339 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 7572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5178 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:32,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 703 Invalid, 7572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2343 Invalid, 0 Unknown, 5178 Unchecked, 1.3s Time] [2022-01-28 15:28:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23558 states. [2022-01-28 15:28:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23558 to 8575. [2022-01-28 15:28:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 3.696057849311873) internal successors, (31690), 8574 states have internal predecessors, (31690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 31690 transitions. [2022-01-28 15:28:33,224 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 31690 transitions. Word has length 30 [2022-01-28 15:28:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 8575 states and 31690 transitions. [2022-01-28 15:28:33,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 31690 transitions. [2022-01-28 15:28:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:28:33,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:33,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:33,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:33,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 15:28:33,451 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1855421983, now seen corresponding path program 25 times [2022-01-28 15:28:33,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047117040] [2022-01-28 15:28:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:33,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:33,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047117040] [2022-01-28 15:28:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047117040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530605500] [2022-01-28 15:28:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:28:33,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:33,647 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) [2022-01-28 15:28:33,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 15:28:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:28:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:28:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:34,026 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:28:34,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-28 15:28:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:28:34,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:28:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:34,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:34,369 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:28:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:28:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:34,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:34,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:34,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:34,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:28:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:35,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:28:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:35,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530605500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:35,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:35,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:28:35,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208713039] [2022-01-28 15:28:35,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:35,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:28:35,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:28:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:28:35,114 INFO L87 Difference]: Start difference. First operand 8575 states and 31690 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:36,924 INFO L93 Difference]: Finished difference Result 13249 states and 47552 transitions. [2022-01-28 15:28:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:28:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:28:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:36,954 INFO L225 Difference]: With dead ends: 13249 [2022-01-28 15:28:36,954 INFO L226 Difference]: Without dead ends: 13219 [2022-01-28 15:28:36,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 15:28:36,962 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:36,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 225 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1706 Invalid, 0 Unknown, 256 Unchecked, 0.9s Time] [2022-01-28 15:28:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13219 states. [2022-01-28 15:28:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13219 to 8795. [2022-01-28 15:28:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8795 states, 8794 states have (on average 3.704116443029338) internal successors, (32574), 8794 states have internal predecessors, (32574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8795 states to 8795 states and 32574 transitions. [2022-01-28 15:28:37,148 INFO L78 Accepts]: Start accepts. Automaton has 8795 states and 32574 transitions. Word has length 30 [2022-01-28 15:28:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:37,148 INFO L470 AbstractCegarLoop]: Abstraction has 8795 states and 32574 transitions. [2022-01-28 15:28:37,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8795 states and 32574 transitions. [2022-01-28 15:28:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:28:37,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:37,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:37,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:37,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:37,379 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 60205597, now seen corresponding path program 26 times [2022-01-28 15:28:37,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246516323] [2022-01-28 15:28:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:37,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:37,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246516323] [2022-01-28 15:28:37,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246516323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038125820] [2022-01-28 15:28:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:28:37,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:37,614 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) [2022-01-28 15:28:37,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 15:28:37,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:28:37,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:28:37,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:37,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:28:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:28:37,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:28:37,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:28:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:38,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:38,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:28:38,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-28 15:28:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:38,636 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:28:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:28:38,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:38,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:38,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:38,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:28:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:38,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038125820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:38,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:38,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 15:28:38,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668466780] [2022-01-28 15:28:38,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:38,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:28:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:28:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:28:38,774 INFO L87 Difference]: Start difference. First operand 8795 states and 32574 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:41,887 INFO L93 Difference]: Finished difference Result 22478 states and 79419 transitions. [2022-01-28 15:28:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:28:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:28:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:41,945 INFO L225 Difference]: With dead ends: 22478 [2022-01-28 15:28:41,945 INFO L226 Difference]: Without dead ends: 22418 [2022-01-28 15:28:41,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=654, Invalid=3128, Unknown=0, NotChecked=0, Total=3782 [2022-01-28 15:28:41,946 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 344 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 3256 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:41,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 494 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:28:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22418 states. [2022-01-28 15:28:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22418 to 8555. [2022-01-28 15:28:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8555 states, 8554 states have (on average 3.6840074818798225) internal successors, (31513), 8554 states have internal predecessors, (31513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8555 states to 8555 states and 31513 transitions. [2022-01-28 15:28:42,241 INFO L78 Accepts]: Start accepts. Automaton has 8555 states and 31513 transitions. Word has length 30 [2022-01-28 15:28:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:42,241 INFO L470 AbstractCegarLoop]: Abstraction has 8555 states and 31513 transitions. [2022-01-28 15:28:42,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 8555 states and 31513 transitions. [2022-01-28 15:28:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:28:42,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:42,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:42,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:42,476 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash -407278369, now seen corresponding path program 27 times [2022-01-28 15:28:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057737445] [2022-01-28 15:28:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:42,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057737445] [2022-01-28 15:28:42,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057737445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919242057] [2022-01-28 15:28:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:28:42,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:42,765 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) [2022-01-28 15:28:42,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 15:28:42,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:28:42,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-28 15:28:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:28:43,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:43,046 INFO L388 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 29 treesize of output 37 [2022-01-28 15:28:43,054 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-28 15:28:43,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-28 15:28:43,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-01-28 15:28:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:43,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:44,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2022-01-28 15:28:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:44,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:44,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 27 [2022-01-28 15:28:44,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:44,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:44,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:44,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2022-01-28 15:28:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:44,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919242057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:44,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:44,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 35 [2022-01-28 15:28:44,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707500189] [2022-01-28 15:28:44,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:44,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-28 15:28:44,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-28 15:28:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:28:44,718 INFO L87 Difference]: Start difference. First operand 8555 states and 31513 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:46,947 INFO L93 Difference]: Finished difference Result 16789 states and 60239 transitions. [2022-01-28 15:28:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:28:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:28:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:46,990 INFO L225 Difference]: With dead ends: 16789 [2022-01-28 15:28:46,990 INFO L226 Difference]: Without dead ends: 16741 [2022-01-28 15:28:46,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=793, Invalid=4463, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 15:28:46,992 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 436 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:47,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 430 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1400 Invalid, 0 Unknown, 1580 Unchecked, 0.6s Time] [2022-01-28 15:28:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16741 states. [2022-01-28 15:28:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16741 to 8575. [2022-01-28 15:28:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 3.6843946815955215) internal successors, (31590), 8574 states have internal predecessors, (31590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 31590 transitions. [2022-01-28 15:28:47,232 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 31590 transitions. Word has length 30 [2022-01-28 15:28:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:47,232 INFO L470 AbstractCegarLoop]: Abstraction has 8575 states and 31590 transitions. [2022-01-28 15:28:47,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 31590 transitions. [2022-01-28 15:28:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:28:47,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:47,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:47,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:47,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:47,465 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:47,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1507855583, now seen corresponding path program 28 times [2022-01-28 15:28:47,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:47,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546729901] [2022-01-28 15:28:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:47,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:47,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546729901] [2022-01-28 15:28:47,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546729901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582197815] [2022-01-28 15:28:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:28:47,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:47,761 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) [2022-01-28 15:28:47,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 15:28:47,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:28:47,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:28:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:47,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:28:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:28:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:28:48,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:28:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 506 treesize of output 474 [2022-01-28 15:28:48,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:48,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:48,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:28:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:48,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:48,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:28:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:48,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582197815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:48,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:48,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:28:48,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160083344] [2022-01-28 15:28:48,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:48,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:28:48,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:28:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:28:48,658 INFO L87 Difference]: Start difference. First operand 8575 states and 31590 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:28:50,074 INFO L93 Difference]: Finished difference Result 13592 states and 49059 transitions. [2022-01-28 15:28:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 15:28:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:28:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:28:50,106 INFO L225 Difference]: With dead ends: 13592 [2022-01-28 15:28:50,106 INFO L226 Difference]: Without dead ends: 13550 [2022-01-28 15:28:50,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 15:28:50,107 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 239 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:28:50,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 261 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:28:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13550 states. [2022-01-28 15:28:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13550 to 9017. [2022-01-28 15:28:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9017 states, 9016 states have (on average 3.6854480922803905) internal successors, (33228), 9016 states have internal predecessors, (33228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9017 states to 9017 states and 33228 transitions. [2022-01-28 15:28:50,281 INFO L78 Accepts]: Start accepts. Automaton has 9017 states and 33228 transitions. Word has length 30 [2022-01-28 15:28:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:28:50,281 INFO L470 AbstractCegarLoop]: Abstraction has 9017 states and 33228 transitions. [2022-01-28 15:28:50,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:28:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9017 states and 33228 transitions. [2022-01-28 15:28:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:28:50,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:28:50,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:28:50,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 15:28:50,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-28 15:28:50,507 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:28:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:28:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -264971719, now seen corresponding path program 29 times [2022-01-28 15:28:50,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:28:50,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362242988] [2022-01-28 15:28:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:28:50,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:28:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:28:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:50,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:28:50,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362242988] [2022-01-28 15:28:50,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362242988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:28:50,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627544643] [2022-01-28 15:28:50,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:28:50,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:28:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:28:50,818 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) [2022-01-28 15:28:50,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 15:28:50,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:28:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:28:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:28:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:28:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:28:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,186 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:28:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2022-01-28 15:28:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 50 [2022-01-28 15:28:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:28:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 45 [2022-01-28 15:28:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:51,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:28:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:28:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:28:51,996 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-28 15:28:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 70 [2022-01-28 15:28:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:28:52,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627544643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:28:52,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:28:52,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-01-28 15:28:52,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633842759] [2022-01-28 15:28:52,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:28:52,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:28:52,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:28:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:28:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:28:52,169 INFO L87 Difference]: Start difference. First operand 9017 states and 33228 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:03,755 INFO L93 Difference]: Finished difference Result 23933 states and 84996 transitions. [2022-01-28 15:29:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-28 15:29:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:03,814 INFO L225 Difference]: With dead ends: 23933 [2022-01-28 15:29:03,814 INFO L226 Difference]: Without dead ends: 23861 [2022-01-28 15:29:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10353 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4033, Invalid=22049, Unknown=0, NotChecked=0, Total=26082 [2022-01-28 15:29:03,815 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 660 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1900 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:03,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 511 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2370 Invalid, 0 Unknown, 1900 Unchecked, 1.5s Time] [2022-01-28 15:29:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2022-01-28 15:29:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 11284. [2022-01-28 15:29:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 3.6959142072143933) internal successors, (41701), 11283 states have internal predecessors, (41701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 41701 transitions. [2022-01-28 15:29:04,083 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 41701 transitions. Word has length 30 [2022-01-28 15:29:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:04,083 INFO L470 AbstractCegarLoop]: Abstraction has 11284 states and 41701 transitions. [2022-01-28 15:29:04,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 41701 transitions. [2022-01-28 15:29:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:04,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:04,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:04,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-28 15:29:04,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:04,306 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -886852129, now seen corresponding path program 30 times [2022-01-28 15:29:04,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068369048] [2022-01-28 15:29:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:04,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:04,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:04,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068369048] [2022-01-28 15:29:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068369048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:04,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877575715] [2022-01-28 15:29:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:29:04,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:04,594 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) [2022-01-28 15:29:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 15:29:04,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:29:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:04,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:04,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:29:04,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:29:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:29:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:04,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:05,188 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:29:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:29:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:05,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:05,363 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:29:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:29:05,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:05,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:05,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877575715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:05,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:05,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-28 15:29:05,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597071490] [2022-01-28 15:29:05,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:29:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:29:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:29:05,472 INFO L87 Difference]: Start difference. First operand 11284 states and 41701 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:08,124 INFO L93 Difference]: Finished difference Result 21760 states and 78815 transitions. [2022-01-28 15:29:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:29:08,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:08,176 INFO L225 Difference]: With dead ends: 21760 [2022-01-28 15:29:08,176 INFO L226 Difference]: Without dead ends: 21718 [2022-01-28 15:29:08,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=461, Invalid=3199, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:29:08,180 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 372 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:08,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 489 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:29:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21718 states. [2022-01-28 15:29:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21718 to 11277. [2022-01-28 15:29:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11277 states, 11276 states have (on average 3.696789641716921) internal successors, (41685), 11276 states have internal predecessors, (41685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11277 states to 11277 states and 41685 transitions. [2022-01-28 15:29:08,437 INFO L78 Accepts]: Start accepts. Automaton has 11277 states and 41685 transitions. Word has length 30 [2022-01-28 15:29:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:08,437 INFO L470 AbstractCegarLoop]: Abstraction has 11277 states and 41685 transitions. [2022-01-28 15:29:08,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11277 states and 41685 transitions. [2022-01-28 15:29:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:08,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:08,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:08,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-28 15:29:08,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:08,660 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:08,660 INFO L85 PathProgramCache]: Analyzing trace with hash 87403971, now seen corresponding path program 31 times [2022-01-28 15:29:08,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:08,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890479859] [2022-01-28 15:29:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:08,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:08,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890479859] [2022-01-28 15:29:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890479859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400749417] [2022-01-28 15:29:08,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:29:08,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:08,944 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) [2022-01-28 15:29:08,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 15:29:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:09,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:29:09,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-01-28 15:29:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-01-28 15:29:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:29:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:09,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:29:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:09,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:09,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:09,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:29:09,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:09,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400749417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:09,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:29:09,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197162729] [2022-01-28 15:29:09,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:09,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:29:09,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:29:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:29:09,930 INFO L87 Difference]: Start difference. First operand 11277 states and 41685 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:12,109 INFO L93 Difference]: Finished difference Result 17514 states and 63503 transitions. [2022-01-28 15:29:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 15:29:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:12,216 INFO L225 Difference]: With dead ends: 17514 [2022-01-28 15:29:12,217 INFO L226 Difference]: Without dead ends: 17460 [2022-01-28 15:29:12,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=478, Invalid=2174, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:29:12,217 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 353 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:12,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 284 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:29:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17460 states. [2022-01-28 15:29:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17460 to 11274. [2022-01-28 15:29:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11274 states, 11273 states have (on average 3.6963541204648274) internal successors, (41669), 11273 states have internal predecessors, (41669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 41669 transitions. [2022-01-28 15:29:12,436 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 41669 transitions. Word has length 30 [2022-01-28 15:29:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:12,436 INFO L470 AbstractCegarLoop]: Abstraction has 11274 states and 41669 transitions. [2022-01-28 15:29:12,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 41669 transitions. [2022-01-28 15:29:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:12,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:12,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:12,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:12,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-28 15:29:12,673 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1378959049, now seen corresponding path program 32 times [2022-01-28 15:29:12,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:12,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398273365] [2022-01-28 15:29:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:12,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:12,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398273365] [2022-01-28 15:29:12,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398273365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964441554] [2022-01-28 15:29:12,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:29:12,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:12,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:12,932 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) [2022-01-28 15:29:12,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 15:29:12,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:29:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:12,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:13,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:29:13,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:29:13,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-28 15:29:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:29:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:13,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:29:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:29:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:13,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:13,865 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:29:13,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:29:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:13,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964441554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:13,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-28 15:29:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601221279] [2022-01-28 15:29:13,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:13,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:29:13,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:29:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:29:13,977 INFO L87 Difference]: Start difference. First operand 11274 states and 41669 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-01-28 15:29:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:15,746 INFO L93 Difference]: Finished difference Result 21698 states and 77707 transitions. [2022-01-28 15:29:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:29:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:15,832 INFO L225 Difference]: With dead ends: 21698 [2022-01-28 15:29:15,832 INFO L226 Difference]: Without dead ends: 21656 [2022-01-28 15:29:15,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=451, Invalid=2971, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 15:29:15,833 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 380 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:15,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 330 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:29:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21656 states. [2022-01-28 15:29:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21656 to 11368. [2022-01-28 15:29:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11368 states, 11367 states have (on average 3.6983372921615203) internal successors, (42039), 11367 states have internal predecessors, (42039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11368 states to 11368 states and 42039 transitions. [2022-01-28 15:29:16,165 INFO L78 Accepts]: Start accepts. Automaton has 11368 states and 42039 transitions. Word has length 30 [2022-01-28 15:29:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 11368 states and 42039 transitions. [2022-01-28 15:29:16,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-01-28 15:29:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11368 states and 42039 transitions. [2022-01-28 15:29:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:16,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:16,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:16,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-28 15:29:16,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-28 15:29:16,400 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 325453983, now seen corresponding path program 33 times [2022-01-28 15:29:16,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649555734] [2022-01-28 15:29:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:16,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:16,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:16,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649555734] [2022-01-28 15:29:16,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649555734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:16,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387357552] [2022-01-28 15:29:16,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:29:16,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:16,642 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) [2022-01-28 15:29:16,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 15:29:16,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:29:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:29:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:16,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:17,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-01-28 15:29:17,047 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-28 15:29:17,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:29:17,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:17,321 INFO L388 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 41 treesize of output 45 [2022-01-28 15:29:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:17,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:18,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:18,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-01-28 15:29:18,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:18,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:18,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-01-28 15:29:18,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:18,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:18,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 60 [2022-01-28 15:29:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:18,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-01-28 15:29:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:18,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387357552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:18,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:18,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-01-28 15:29:18,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905943893] [2022-01-28 15:29:18,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:18,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:29:18,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:29:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:29:18,481 INFO L87 Difference]: Start difference. First operand 11368 states and 42039 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:26,533 INFO L93 Difference]: Finished difference Result 24434 states and 86414 transitions. [2022-01-28 15:29:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-28 15:29:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:26,601 INFO L225 Difference]: With dead ends: 24434 [2022-01-28 15:29:26,601 INFO L226 Difference]: Without dead ends: 24260 [2022-01-28 15:29:26,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7882 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2678, Invalid=18784, Unknown=0, NotChecked=0, Total=21462 [2022-01-28 15:29:26,604 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 640 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 4377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3168 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:26,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 685 Invalid, 4377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1127 Invalid, 0 Unknown, 3168 Unchecked, 0.6s Time] [2022-01-28 15:29:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24260 states. [2022-01-28 15:29:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24260 to 11652. [2022-01-28 15:29:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11652 states, 11651 states have (on average 3.692129430950133) internal successors, (43017), 11651 states have internal predecessors, (43017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11652 states to 11652 states and 43017 transitions. [2022-01-28 15:29:26,996 INFO L78 Accepts]: Start accepts. Automaton has 11652 states and 43017 transitions. Word has length 30 [2022-01-28 15:29:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:26,996 INFO L470 AbstractCegarLoop]: Abstraction has 11652 states and 43017 transitions. [2022-01-28 15:29:26,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 11652 states and 43017 transitions. [2022-01-28 15:29:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:27,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:27,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:27,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:27,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-28 15:29:27,237 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash -578794981, now seen corresponding path program 34 times [2022-01-28 15:29:27,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:27,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059646391] [2022-01-28 15:29:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:27,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:27,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:27,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059646391] [2022-01-28 15:29:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059646391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900309292] [2022-01-28 15:29:27,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:29:27,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:27,476 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) [2022-01-28 15:29:27,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 15:29:27,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:29:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:27,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:27,895 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:29:27,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-28 15:29:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:27,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:29:28,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-28 15:29:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:28,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:28,241 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:29:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:29:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:28,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:28,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:29,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:29,085 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:29:29,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:29:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:29,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:29,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900309292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:29,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:29,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:29:29,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122425897] [2022-01-28 15:29:29,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:29,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:29:29,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:29:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:29:29,185 INFO L87 Difference]: Start difference. First operand 11652 states and 43017 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:31,224 INFO L93 Difference]: Finished difference Result 18711 states and 66544 transitions. [2022-01-28 15:29:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:29:31,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:31,268 INFO L225 Difference]: With dead ends: 18711 [2022-01-28 15:29:31,268 INFO L226 Difference]: Without dead ends: 18633 [2022-01-28 15:29:31,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=323, Invalid=2539, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:29:31,269 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 240 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:31,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 480 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2169 Invalid, 0 Unknown, 204 Unchecked, 1.0s Time] [2022-01-28 15:29:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18633 states. [2022-01-28 15:29:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18633 to 11768. [2022-01-28 15:29:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11768 states, 11767 states have (on average 3.689130619529192) internal successors, (43410), 11767 states have internal predecessors, (43410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11768 states to 11768 states and 43410 transitions. [2022-01-28 15:29:31,543 INFO L78 Accepts]: Start accepts. Automaton has 11768 states and 43410 transitions. Word has length 30 [2022-01-28 15:29:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 11768 states and 43410 transitions. [2022-01-28 15:29:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11768 states and 43410 transitions. [2022-01-28 15:29:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:31,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:31,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:31,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:31,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-28 15:29:31,774 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1129332235, now seen corresponding path program 35 times [2022-01-28 15:29:31,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:31,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101812636] [2022-01-28 15:29:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:31,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:32,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101812636] [2022-01-28 15:29:32,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101812636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530079922] [2022-01-28 15:29:32,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:29:32,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:32,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:32,025 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) [2022-01-28 15:29:32,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 15:29:32,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:29:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:29:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:32,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:29:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:32,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:32,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:32,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-28 15:29:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:32,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 15:29:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:32,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:32,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-28 15:29:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:32,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 502 treesize of output 470 [2022-01-28 15:29:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:33,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:33,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:29:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:33,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:33,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530079922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:33,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:33,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-28 15:29:33,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736704421] [2022-01-28 15:29:33,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:33,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:29:33,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:29:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:29:33,321 INFO L87 Difference]: Start difference. First operand 11768 states and 43410 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:43,764 INFO L93 Difference]: Finished difference Result 33953 states and 118412 transitions. [2022-01-28 15:29:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-28 15:29:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:43,874 INFO L225 Difference]: With dead ends: 33953 [2022-01-28 15:29:43,874 INFO L226 Difference]: Without dead ends: 33752 [2022-01-28 15:29:43,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12265 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3835, Invalid=28027, Unknown=0, NotChecked=0, Total=31862 [2022-01-28 15:29:43,876 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 944 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 4587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1866 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:43,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 851 Invalid, 4587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2574 Invalid, 0 Unknown, 1866 Unchecked, 1.6s Time] [2022-01-28 15:29:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33752 states. [2022-01-28 15:29:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33752 to 12791. [2022-01-28 15:29:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 12790 states have (on average 3.7150117279124317) internal successors, (47515), 12790 states have internal predecessors, (47515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 47515 transitions. [2022-01-28 15:29:44,378 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 47515 transitions. Word has length 30 [2022-01-28 15:29:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:44,379 INFO L470 AbstractCegarLoop]: Abstraction has 12791 states and 47515 transitions. [2022-01-28 15:29:44,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 47515 transitions. [2022-01-28 15:29:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:44,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:44,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:44,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:44,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 15:29:44,618 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1475639897, now seen corresponding path program 36 times [2022-01-28 15:29:44,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357743759] [2022-01-28 15:29:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:44,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:44,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:44,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357743759] [2022-01-28 15:29:44,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357743759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:44,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93382097] [2022-01-28 15:29:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:29:44,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:44,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:44,859 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) [2022-01-28 15:29:44,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 15:29:44,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:29:44,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:45,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:29:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:29:45,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:29:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:45,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:29:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:29:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:45,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93382097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:45,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:45,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-28 15:29:45,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905949721] [2022-01-28 15:29:45,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:45,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:29:45,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:29:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:29:45,924 INFO L87 Difference]: Start difference. First operand 12791 states and 47515 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:48,168 INFO L93 Difference]: Finished difference Result 20481 states and 74351 transitions. [2022-01-28 15:29:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:29:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:48,228 INFO L225 Difference]: With dead ends: 20481 [2022-01-28 15:29:48,228 INFO L226 Difference]: Without dead ends: 20419 [2022-01-28 15:29:48,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=444, Invalid=2312, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:29:48,229 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 325 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 315 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1825 Invalid, 0 Unknown, 309 Unchecked, 0.9s Time] [2022-01-28 15:29:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20419 states. [2022-01-28 15:29:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20419 to 13106. [2022-01-28 15:29:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13106 states, 13105 states have (on average 3.7300267073636015) internal successors, (48882), 13105 states have internal predecessors, (48882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13106 states to 13106 states and 48882 transitions. [2022-01-28 15:29:48,571 INFO L78 Accepts]: Start accepts. Automaton has 13106 states and 48882 transitions. Word has length 30 [2022-01-28 15:29:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:48,571 INFO L470 AbstractCegarLoop]: Abstraction has 13106 states and 48882 transitions. [2022-01-28 15:29:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13106 states and 48882 transitions. [2022-01-28 15:29:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:48,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:48,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:48,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:48,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-28 15:29:48,815 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1900216095, now seen corresponding path program 37 times [2022-01-28 15:29:48,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:48,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314497145] [2022-01-28 15:29:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:48,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:49,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314497145] [2022-01-28 15:29:49,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314497145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437025549] [2022-01-28 15:29:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:29:49,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:49,094 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) [2022-01-28 15:29:49,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 15:29:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:49,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:29:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:29:49,573 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:29:49,573 INFO L388 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 32 treesize of output 23 [2022-01-28 15:29:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:49,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:49,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:49,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:29:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:50,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:50,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:50,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:29:50,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:50,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437025549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:50,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-28 15:29:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973617145] [2022-01-28 15:29:50,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:29:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:29:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:29:50,411 INFO L87 Difference]: Start difference. First operand 13106 states and 48882 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:51,545 INFO L93 Difference]: Finished difference Result 19214 states and 70532 transitions. [2022-01-28 15:29:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:29:51,545 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:51,600 INFO L225 Difference]: With dead ends: 19214 [2022-01-28 15:29:51,600 INFO L226 Difference]: Without dead ends: 19148 [2022-01-28 15:29:51,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:29:51,601 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 236 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:51,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 219 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:29:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19148 states. [2022-01-28 15:29:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19148 to 13789. [2022-01-28 15:29:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13789 states, 13788 states have (on average 3.73382651581085) internal successors, (51482), 13788 states have internal predecessors, (51482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13789 states to 13789 states and 51482 transitions. [2022-01-28 15:29:51,993 INFO L78 Accepts]: Start accepts. Automaton has 13789 states and 51482 transitions. Word has length 30 [2022-01-28 15:29:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:51,993 INFO L470 AbstractCegarLoop]: Abstraction has 13789 states and 51482 transitions. [2022-01-28 15:29:51,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 13789 states and 51482 transitions. [2022-01-28 15:29:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:52,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:52,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:52,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-28 15:29:52,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-28 15:29:52,241 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 127388793, now seen corresponding path program 38 times [2022-01-28 15:29:52,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423824476] [2022-01-28 15:29:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:52,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:52,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423824476] [2022-01-28 15:29:52,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423824476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521485263] [2022-01-28 15:29:52,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:29:52,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:52,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:52,556 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) [2022-01-28 15:29:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 15:29:52,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:29:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:29:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:52,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:29:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:29:52,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:29:53,006 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:29:53,007 INFO L388 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 32 treesize of output 23 [2022-01-28 15:29:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:53,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:29:53,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:29:53,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:29:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:53,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:29:53,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:29:53,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:53,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:29:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:29:53,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:29:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:53,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521485263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:29:53,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:29:53,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:29:53,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102455886] [2022-01-28 15:29:53,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:29:53,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:29:53,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:29:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:29:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:29:53,815 INFO L87 Difference]: Start difference. First operand 13789 states and 51482 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:29:58,262 INFO L93 Difference]: Finished difference Result 32580 states and 118229 transitions. [2022-01-28 15:29:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 15:29:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:29:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:29:58,359 INFO L225 Difference]: With dead ends: 32580 [2022-01-28 15:29:58,359 INFO L226 Difference]: Without dead ends: 32477 [2022-01-28 15:29:58,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1364, Invalid=7008, Unknown=0, NotChecked=0, Total=8372 [2022-01-28 15:29:58,367 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:29:58,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 398 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:29:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32477 states. [2022-01-28 15:29:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32477 to 14045. [2022-01-28 15:29:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14045 states, 14044 states have (on average 3.7337653090287666) internal successors, (52437), 14044 states have internal predecessors, (52437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14045 states to 14045 states and 52437 transitions. [2022-01-28 15:29:58,857 INFO L78 Accepts]: Start accepts. Automaton has 14045 states and 52437 transitions. Word has length 30 [2022-01-28 15:29:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:29:58,858 INFO L470 AbstractCegarLoop]: Abstraction has 14045 states and 52437 transitions. [2022-01-28 15:29:58,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:29:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14045 states and 52437 transitions. [2022-01-28 15:29:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:29:58,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:29:58,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:29:58,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-28 15:29:59,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-28 15:29:59,137 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:29:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:29:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 479764483, now seen corresponding path program 39 times [2022-01-28 15:29:59,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:29:59,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703692593] [2022-01-28 15:29:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:29:59,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:29:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:29:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:29:59,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:29:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703692593] [2022-01-28 15:29:59,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703692593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:29:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802961612] [2022-01-28 15:29:59,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:29:59,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:29:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:29:59,378 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) [2022-01-28 15:29:59,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 15:29:59,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:29:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:29:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-28 15:29:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:29:59,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:29:59,669 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-01-28 15:29:59,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:29:59,840 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-28 15:29:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 36 [2022-01-28 15:30:00,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 66 [2022-01-28 15:30:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:00,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:00,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:00,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2022-01-28 15:30:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:01,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:01,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-28 15:30:01,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:01,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-28 15:30:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802961612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:01,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:01,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 33 [2022-01-28 15:30:01,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824791424] [2022-01-28 15:30:01,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:01,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:30:01,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:30:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:30:01,341 INFO L87 Difference]: Start difference. First operand 14045 states and 52437 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:09,657 INFO L93 Difference]: Finished difference Result 32781 states and 117794 transitions. [2022-01-28 15:30:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-28 15:30:09,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:09,745 INFO L225 Difference]: With dead ends: 32781 [2022-01-28 15:30:09,745 INFO L226 Difference]: Without dead ends: 32650 [2022-01-28 15:30:09,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6592 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2939, Invalid=15151, Unknown=0, NotChecked=0, Total=18090 [2022-01-28 15:30:09,746 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 541 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2400 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:09,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 523 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1212 Invalid, 0 Unknown, 2400 Unchecked, 0.7s Time] [2022-01-28 15:30:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32650 states. [2022-01-28 15:30:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32650 to 14318. [2022-01-28 15:30:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14318 states, 14317 states have (on average 3.736676678075016) internal successors, (53498), 14317 states have internal predecessors, (53498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14318 states to 14318 states and 53498 transitions. [2022-01-28 15:30:10,197 INFO L78 Accepts]: Start accepts. Automaton has 14318 states and 53498 transitions. Word has length 30 [2022-01-28 15:30:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 14318 states and 53498 transitions. [2022-01-28 15:30:10,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14318 states and 53498 transitions. [2022-01-28 15:30:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:10,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:10,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:10,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:10,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:10,444 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -923184411, now seen corresponding path program 40 times [2022-01-28 15:30:10,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:10,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199578507] [2022-01-28 15:30:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:10,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:10,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199578507] [2022-01-28 15:30:10,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199578507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031274973] [2022-01-28 15:30:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:30:10,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:10,709 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) [2022-01-28 15:30:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 15:30:10,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:30:10,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:30:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:10,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:30:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:30:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:30:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:11,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:11,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:30:11,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:30:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031274973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:12,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:12,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:30:12,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992491030] [2022-01-28 15:30:12,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:30:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:30:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:30:12,385 INFO L87 Difference]: Start difference. First operand 14318 states and 53498 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:14,658 INFO L93 Difference]: Finished difference Result 20546 states and 74611 transitions. [2022-01-28 15:30:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:30:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:14,709 INFO L225 Difference]: With dead ends: 20546 [2022-01-28 15:30:14,709 INFO L226 Difference]: Without dead ends: 20508 [2022-01-28 15:30:14,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=514, Invalid=2348, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:30:14,710 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 398 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:14,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 311 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:30:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20508 states. [2022-01-28 15:30:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20508 to 14296. [2022-01-28 15:30:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14296 states, 14295 states have (on average 3.7389296956977964) internal successors, (53448), 14295 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14296 states to 14296 states and 53448 transitions. [2022-01-28 15:30:15,027 INFO L78 Accepts]: Start accepts. Automaton has 14296 states and 53448 transitions. Word has length 30 [2022-01-28 15:30:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:15,027 INFO L470 AbstractCegarLoop]: Abstraction has 14296 states and 53448 transitions. [2022-01-28 15:30:15,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 14296 states and 53448 transitions. [2022-01-28 15:30:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:15,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:15,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:15,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:15,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:15,267 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1788403899, now seen corresponding path program 41 times [2022-01-28 15:30:15,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161381500] [2022-01-28 15:30:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:15,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:15,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161381500] [2022-01-28 15:30:15,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161381500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068526756] [2022-01-28 15:30:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:30:15,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:15,583 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) [2022-01-28 15:30:15,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 15:30:15,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:30:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:30:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:15,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:15,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:30:15,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:30:16,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:30:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:16,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:16,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 506 treesize of output 474 [2022-01-28 15:30:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:16,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:16,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,561 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:30:16,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:30:16,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068526756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:16,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:30:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616322434] [2022-01-28 15:30:16,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:16,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:30:16,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:30:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:30:16,707 INFO L87 Difference]: Start difference. First operand 14296 states and 53448 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:21,562 INFO L93 Difference]: Finished difference Result 25262 states and 90458 transitions. [2022-01-28 15:30:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 15:30:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:21,627 INFO L225 Difference]: With dead ends: 25262 [2022-01-28 15:30:21,627 INFO L226 Difference]: Without dead ends: 25174 [2022-01-28 15:30:21,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=874, Invalid=7682, Unknown=0, NotChecked=0, Total=8556 [2022-01-28 15:30:21,628 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 316 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:21,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 431 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:30:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25174 states. [2022-01-28 15:30:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25174 to 14304. [2022-01-28 15:30:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14304 states, 14303 states have (on average 3.738586310564217) internal successors, (53473), 14303 states have internal predecessors, (53473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14304 states to 14304 states and 53473 transitions. [2022-01-28 15:30:21,981 INFO L78 Accepts]: Start accepts. Automaton has 14304 states and 53473 transitions. Word has length 30 [2022-01-28 15:30:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:21,981 INFO L470 AbstractCegarLoop]: Abstraction has 14304 states and 53473 transitions. [2022-01-28 15:30:21,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14304 states and 53473 transitions. [2022-01-28 15:30:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:22,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:22,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:22,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:22,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-28 15:30:22,209 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash -179992705, now seen corresponding path program 42 times [2022-01-28 15:30:22,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187012436] [2022-01-28 15:30:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:22,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:22,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187012436] [2022-01-28 15:30:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187012436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315428513] [2022-01-28 15:30:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:30:22,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:22,459 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) [2022-01-28 15:30:22,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 15:30:22,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:30:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:30:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:22,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:30:22,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:30:22,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:30:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:30:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:22,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:23,120 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:30:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2058 treesize of output 1962 [2022-01-28 15:30:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:23,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:23,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:23,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:23,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315428513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:23,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:23,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-28 15:30:23,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274120201] [2022-01-28 15:30:23,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:23,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:30:23,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:30:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:30:23,694 INFO L87 Difference]: Start difference. First operand 14304 states and 53473 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:28,808 INFO L93 Difference]: Finished difference Result 32926 states and 114814 transitions. [2022-01-28 15:30:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-28 15:30:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:28,920 INFO L225 Difference]: With dead ends: 32926 [2022-01-28 15:30:28,920 INFO L226 Difference]: Without dead ends: 32754 [2022-01-28 15:30:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1090, Invalid=8222, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 15:30:28,921 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 5379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:28,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1003 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-28 15:30:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32754 states. [2022-01-28 15:30:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32754 to 15993. [2022-01-28 15:30:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15993 states, 15992 states have (on average 3.7265507753876936) internal successors, (59595), 15992 states have internal predecessors, (59595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15993 states to 15993 states and 59595 transitions. [2022-01-28 15:30:29,493 INFO L78 Accepts]: Start accepts. Automaton has 15993 states and 59595 transitions. Word has length 30 [2022-01-28 15:30:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:29,493 INFO L470 AbstractCegarLoop]: Abstraction has 15993 states and 59595 transitions. [2022-01-28 15:30:29,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 15993 states and 59595 transitions. [2022-01-28 15:30:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:29,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:29,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:29,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:29,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-28 15:30:29,738 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash -587609219, now seen corresponding path program 43 times [2022-01-28 15:30:29,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029141669] [2022-01-28 15:30:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:29,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:29,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029141669] [2022-01-28 15:30:29,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029141669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:29,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405345709] [2022-01-28 15:30:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:30:29,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:29,976 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) [2022-01-28 15:30:29,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 15:30:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:30:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:30,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:30:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:30,302 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:30:30,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2022-01-28 15:30:30,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:30:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:30,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:30,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2090 treesize of output 1994 [2022-01-28 15:30:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:31,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:31,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:31,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:31,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:31,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405345709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:31,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:31,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-28 15:30:31,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875286917] [2022-01-28 15:30:31,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:31,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:30:31,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:30:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:30:31,264 INFO L87 Difference]: Start difference. First operand 15993 states and 59595 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:33,212 INFO L93 Difference]: Finished difference Result 23520 states and 85878 transitions. [2022-01-28 15:30:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:30:33,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:33,271 INFO L225 Difference]: With dead ends: 23520 [2022-01-28 15:30:33,271 INFO L226 Difference]: Without dead ends: 23454 [2022-01-28 15:30:33,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 15:30:33,272 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 299 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:33,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 283 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:30:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23454 states. [2022-01-28 15:30:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23454 to 16185. [2022-01-28 15:30:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16185 states, 16184 states have (on average 3.7317103311913002) internal successors, (60394), 16184 states have internal predecessors, (60394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16185 states to 16185 states and 60394 transitions. [2022-01-28 15:30:33,668 INFO L78 Accepts]: Start accepts. Automaton has 16185 states and 60394 transitions. Word has length 30 [2022-01-28 15:30:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:33,668 INFO L470 AbstractCegarLoop]: Abstraction has 16185 states and 60394 transitions. [2022-01-28 15:30:33,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 16185 states and 60394 transitions. [2022-01-28 15:30:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:33,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:33,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:33,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:33,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-28 15:30:33,916 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash 372151875, now seen corresponding path program 44 times [2022-01-28 15:30:33,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539540543] [2022-01-28 15:30:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:33,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:34,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539540543] [2022-01-28 15:30:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539540543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935921267] [2022-01-28 15:30:34,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:30:34,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:34,221 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) [2022-01-28 15:30:34,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 15:30:34,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:30:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:30:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:34,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:30:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 15:30:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:34,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-28 15:30:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:30:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:35,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:30:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:35,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:35,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:35,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935921267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:35,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:35,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-28 15:30:35,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198100175] [2022-01-28 15:30:35,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:35,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:30:35,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:30:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:30:35,341 INFO L87 Difference]: Start difference. First operand 16185 states and 60394 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:40,059 INFO L93 Difference]: Finished difference Result 36347 states and 128669 transitions. [2022-01-28 15:30:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-28 15:30:40,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:40,179 INFO L225 Difference]: With dead ends: 36347 [2022-01-28 15:30:40,179 INFO L226 Difference]: Without dead ends: 36194 [2022-01-28 15:30:40,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1149, Invalid=8751, Unknown=0, NotChecked=0, Total=9900 [2022-01-28 15:30:40,181 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 606 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:40,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 618 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:30:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36194 states. [2022-01-28 15:30:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36194 to 17624. [2022-01-28 15:30:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17624 states, 17623 states have (on average 3.7379560801225673) internal successors, (65874), 17623 states have internal predecessors, (65874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17624 states to 17624 states and 65874 transitions. [2022-01-28 15:30:40,745 INFO L78 Accepts]: Start accepts. Automaton has 17624 states and 65874 transitions. Word has length 30 [2022-01-28 15:30:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:40,745 INFO L470 AbstractCegarLoop]: Abstraction has 17624 states and 65874 transitions. [2022-01-28 15:30:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17624 states and 65874 transitions. [2022-01-28 15:30:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:40,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:40,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:40,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:40,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:40,993 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:40,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2007681469, now seen corresponding path program 45 times [2022-01-28 15:30:40,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623729190] [2022-01-28 15:30:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:40,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:41,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:41,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623729190] [2022-01-28 15:30:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623729190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:41,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702884651] [2022-01-28 15:30:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:30:41,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:41,326 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) [2022-01-28 15:30:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 15:30:41,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:30:41,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:30:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:41,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-28 15:30:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:41,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:41,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-01-28 15:30:41,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:30:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:41,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:42,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:42,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 432 treesize of output 417 [2022-01-28 15:30:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:42,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:42,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:42,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:42,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702884651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:42,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:42,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-01-28 15:30:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889006749] [2022-01-28 15:30:42,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:30:42,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:30:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:30:42,788 INFO L87 Difference]: Start difference. First operand 17624 states and 65874 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:49,308 INFO L93 Difference]: Finished difference Result 21704 states and 80591 transitions. [2022-01-28 15:30:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-28 15:30:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:49,375 INFO L225 Difference]: With dead ends: 21704 [2022-01-28 15:30:49,375 INFO L226 Difference]: Without dead ends: 21662 [2022-01-28 15:30:49,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1037, Invalid=7705, Unknown=0, NotChecked=0, Total=8742 [2022-01-28 15:30:49,376 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 239 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:49,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 404 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1124 Invalid, 0 Unknown, 875 Unchecked, 0.6s Time] [2022-01-28 15:30:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21662 states. [2022-01-28 15:30:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21662 to 18042. [2022-01-28 15:30:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18042 states, 18041 states have (on average 3.744969791031539) internal successors, (67563), 18041 states have internal predecessors, (67563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18042 states to 18042 states and 67563 transitions. [2022-01-28 15:30:49,844 INFO L78 Accepts]: Start accepts. Automaton has 18042 states and 67563 transitions. Word has length 30 [2022-01-28 15:30:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 18042 states and 67563 transitions. [2022-01-28 15:30:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18042 states and 67563 transitions. [2022-01-28 15:30:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:49,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:49,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:49,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 15:30:50,098 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2027810493, now seen corresponding path program 46 times [2022-01-28 15:30:50,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994599274] [2022-01-28 15:30:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:50,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:50,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994599274] [2022-01-28 15:30:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994599274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376330577] [2022-01-28 15:30:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:30:50,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:50,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:50,428 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) [2022-01-28 15:30:50,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 15:30:50,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:30:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:30:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:50,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:30:50,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-28 15:30:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:30:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:50,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:51,218 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:30:51,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 502 treesize of output 470 [2022-01-28 15:30:51,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:51,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:51,324 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:30:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:30:51,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:51,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:51,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376330577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:51,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:51,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-28 15:30:51,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662092894] [2022-01-28 15:30:51,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:51,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:30:51,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:30:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:30:51,434 INFO L87 Difference]: Start difference. First operand 18042 states and 67563 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:30:52,823 INFO L93 Difference]: Finished difference Result 25379 states and 93854 transitions. [2022-01-28 15:30:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 15:30:52,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:30:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:30:52,893 INFO L225 Difference]: With dead ends: 25379 [2022-01-28 15:30:52,893 INFO L226 Difference]: Without dead ends: 25325 [2022-01-28 15:30:52,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:30:52,895 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 286 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:30:52,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 365 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:30:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25325 states. [2022-01-28 15:30:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25325 to 18043. [2022-01-28 15:30:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18043 states, 18042 states have (on average 3.742766877286332) internal successors, (67527), 18042 states have internal predecessors, (67527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18043 states to 18043 states and 67527 transitions. [2022-01-28 15:30:53,482 INFO L78 Accepts]: Start accepts. Automaton has 18043 states and 67527 transitions. Word has length 30 [2022-01-28 15:30:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:30:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 18043 states and 67527 transitions. [2022-01-28 15:30:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:30:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18043 states and 67527 transitions. [2022-01-28 15:30:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:30:53,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:30:53,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:30:53,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-28 15:30:53,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:53,730 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:30:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:30:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -107421885, now seen corresponding path program 47 times [2022-01-28 15:30:53,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:30:53,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321290527] [2022-01-28 15:30:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:30:53,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:30:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:30:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:54,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:30:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321290527] [2022-01-28 15:30:54,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321290527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:30:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921955928] [2022-01-28 15:30:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:30:54,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:30:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:30:54,107 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) [2022-01-28 15:30:54,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 15:30:54,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:30:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:30:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:30:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:30:54,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:30:54,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:30:54,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:30:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:30:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:30:54,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:54,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:30:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:55,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:55,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:30:55,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:30:55,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:30:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:30:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:30:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:30:55,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921955928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:30:55,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:30:55,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-28 15:30:55,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737207423] [2022-01-28 15:30:55,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:30:55,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:30:55,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:30:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:30:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:30:55,326 INFO L87 Difference]: Start difference. First operand 18043 states and 67527 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:14,499 INFO L93 Difference]: Finished difference Result 61679 states and 217718 transitions. [2022-01-28 15:31:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-28 15:31:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:14,723 INFO L225 Difference]: With dead ends: 61679 [2022-01-28 15:31:14,724 INFO L226 Difference]: Without dead ends: 61565 [2022-01-28 15:31:14,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15040 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=5785, Invalid=34415, Unknown=0, NotChecked=0, Total=40200 [2022-01-28 15:31:14,726 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 847 mSDsluCounter, 3354 mSDsCounter, 0 mSdLazyCounter, 9226 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 9420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 9226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:14,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1847 Invalid, 9420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 9226 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-28 15:31:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61565 states. [2022-01-28 15:31:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61565 to 21538. [2022-01-28 15:31:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21538 states, 21537 states have (on average 3.755165529089474) internal successors, (80875), 21537 states have internal predecessors, (80875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21538 states to 21538 states and 80875 transitions. [2022-01-28 15:31:15,732 INFO L78 Accepts]: Start accepts. Automaton has 21538 states and 80875 transitions. Word has length 30 [2022-01-28 15:31:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:15,732 INFO L470 AbstractCegarLoop]: Abstraction has 21538 states and 80875 transitions. [2022-01-28 15:31:15,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 21538 states and 80875 transitions. [2022-01-28 15:31:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:15,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:15,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:15,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 15:31:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-28 15:31:15,988 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 866834215, now seen corresponding path program 48 times [2022-01-28 15:31:15,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256129654] [2022-01-28 15:31:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:15,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:16,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256129654] [2022-01-28 15:31:16,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256129654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045524400] [2022-01-28 15:31:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:31:16,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:16,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:16,315 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) [2022-01-28 15:31:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 15:31:16,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:31:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:31:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:31:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:31:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:16,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-28 15:31:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-28 15:31:16,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-01-28 15:31:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:16,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:16,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:31:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:17,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:17,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:31:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:17,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:17,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045524400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:17,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:17,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-28 15:31:17,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768785188] [2022-01-28 15:31:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:31:17,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:31:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:31:17,273 INFO L87 Difference]: Start difference. First operand 21538 states and 80875 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:21,294 INFO L93 Difference]: Finished difference Result 51548 states and 184398 transitions. [2022-01-28 15:31:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-28 15:31:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:21,472 INFO L225 Difference]: With dead ends: 51548 [2022-01-28 15:31:21,472 INFO L226 Difference]: Without dead ends: 51482 [2022-01-28 15:31:21,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1072, Invalid=6068, Unknown=0, NotChecked=0, Total=7140 [2022-01-28 15:31:21,473 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 584 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 3448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:21,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 724 Invalid, 3448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:31:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51482 states. [2022-01-28 15:31:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51482 to 23481. [2022-01-28 15:31:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23481 states, 23480 states have (on average 3.7631175468483815) internal successors, (88358), 23480 states have internal predecessors, (88358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23481 states to 23481 states and 88358 transitions. [2022-01-28 15:31:22,413 INFO L78 Accepts]: Start accepts. Automaton has 23481 states and 88358 transitions. Word has length 30 [2022-01-28 15:31:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:22,413 INFO L470 AbstractCegarLoop]: Abstraction has 23481 states and 88358 transitions. [2022-01-28 15:31:22,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23481 states and 88358 transitions. [2022-01-28 15:31:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:22,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:22,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:22,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 15:31:22,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-28 15:31:22,665 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1797770243, now seen corresponding path program 49 times [2022-01-28 15:31:22,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513158191] [2022-01-28 15:31:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:22,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:23,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:23,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513158191] [2022-01-28 15:31:23,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513158191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:23,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978617036] [2022-01-28 15:31:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:31:23,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:23,033 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) [2022-01-28 15:31:23,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 15:31:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:31:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:23,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:31:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:23,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 15:31:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-28 15:31:23,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:31:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:23,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:23,866 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:31:23,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:31:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:23,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:23,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:24,025 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:31:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:31:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:24,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978617036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:24,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:24,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-28 15:31:24,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454662057] [2022-01-28 15:31:24,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:24,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:31:24,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:31:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:31:24,147 INFO L87 Difference]: Start difference. First operand 23481 states and 88358 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:28,440 INFO L93 Difference]: Finished difference Result 43459 states and 158871 transitions. [2022-01-28 15:31:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-28 15:31:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:28,597 INFO L225 Difference]: With dead ends: 43459 [2022-01-28 15:31:28,597 INFO L226 Difference]: Without dead ends: 43417 [2022-01-28 15:31:28,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=945, Invalid=6537, Unknown=0, NotChecked=0, Total=7482 [2022-01-28 15:31:28,598 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 528 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:28,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 495 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:31:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43417 states. [2022-01-28 15:31:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43417 to 23532. [2022-01-28 15:31:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23532 states, 23531 states have (on average 3.7645233946708596) internal successors, (88583), 23531 states have internal predecessors, (88583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23532 states to 23532 states and 88583 transitions. [2022-01-28 15:31:29,329 INFO L78 Accepts]: Start accepts. Automaton has 23532 states and 88583 transitions. Word has length 30 [2022-01-28 15:31:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:29,329 INFO L470 AbstractCegarLoop]: Abstraction has 23532 states and 88583 transitions. [2022-01-28 15:31:29,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23532 states and 88583 transitions. [2022-01-28 15:31:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:29,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:29,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:29,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-28 15:31:29,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:29,590 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash 354667959, now seen corresponding path program 50 times [2022-01-28 15:31:29,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:29,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576749644] [2022-01-28 15:31:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:29,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:29,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576749644] [2022-01-28 15:31:29,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576749644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803710173] [2022-01-28 15:31:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:31:29,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:29,817 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) [2022-01-28 15:31:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 15:31:29,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:31:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:31:29,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:31:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:29,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:31:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:30,175 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:31:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-28 15:31:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:30,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-28 15:31:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:31:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:30,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2070 treesize of output 1974 [2022-01-28 15:31:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:31,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:31:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:31,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803710173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:31,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-28 15:31:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690771455] [2022-01-28 15:31:31,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:31,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:31:31,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:31:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:31:31,498 INFO L87 Difference]: Start difference. First operand 23532 states and 88583 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:37,642 INFO L93 Difference]: Finished difference Result 38741 states and 142250 transitions. [2022-01-28 15:31:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-28 15:31:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:37,785 INFO L225 Difference]: With dead ends: 38741 [2022-01-28 15:31:37,786 INFO L226 Difference]: Without dead ends: 38661 [2022-01-28 15:31:37,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1130, Invalid=5842, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:31:37,787 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 507 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:37,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 521 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3823 Invalid, 0 Unknown, 266 Unchecked, 2.2s Time] [2022-01-28 15:31:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38661 states. [2022-01-28 15:31:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38661 to 25419. [2022-01-28 15:31:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25419 states, 25418 states have (on average 3.7663860256511135) internal successors, (95734), 25418 states have internal predecessors, (95734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25419 states to 25419 states and 95734 transitions. [2022-01-28 15:31:38,495 INFO L78 Accepts]: Start accepts. Automaton has 25419 states and 95734 transitions. Word has length 30 [2022-01-28 15:31:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:38,495 INFO L470 AbstractCegarLoop]: Abstraction has 25419 states and 95734 transitions. [2022-01-28 15:31:38,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25419 states and 95734 transitions. [2022-01-28 15:31:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:38,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:38,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:38,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 15:31:38,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-28 15:31:38,755 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1813934777, now seen corresponding path program 51 times [2022-01-28 15:31:38,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:38,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441288003] [2022-01-28 15:31:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:38,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:39,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441288003] [2022-01-28 15:31:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441288003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142699227] [2022-01-28 15:31:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:31:39,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:39,015 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) [2022-01-28 15:31:39,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 15:31:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:31:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:31:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:31:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:39,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:31:39,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:31:39,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:39,395 INFO L388 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 29 treesize of output 37 [2022-01-28 15:31:39,544 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:31:39,544 INFO L388 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 32 treesize of output 23 [2022-01-28 15:31:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:39,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:40,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:40,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1286 treesize of output 1223 [2022-01-28 15:31:42,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:42,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:31:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:42,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:42,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142699227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:42,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:42,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:31:42,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814285859] [2022-01-28 15:31:42,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:42,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:31:42,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:31:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:31:42,477 INFO L87 Difference]: Start difference. First operand 25419 states and 95734 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:50,599 INFO L93 Difference]: Finished difference Result 52092 states and 193631 transitions. [2022-01-28 15:31:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-28 15:31:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:50,790 INFO L225 Difference]: With dead ends: 52092 [2022-01-28 15:31:50,790 INFO L226 Difference]: Without dead ends: 52050 [2022-01-28 15:31:50,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1906, Invalid=9866, Unknown=0, NotChecked=0, Total=11772 [2022-01-28 15:31:50,795 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1574 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:50,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 380 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1233 Invalid, 0 Unknown, 1574 Unchecked, 0.7s Time] [2022-01-28 15:31:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52050 states. [2022-01-28 15:31:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52050 to 34694. [2022-01-28 15:31:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34694 states, 34693 states have (on average 3.7689447438964634) internal successors, (130756), 34693 states have internal predecessors, (130756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34694 states to 34694 states and 130756 transitions. [2022-01-28 15:31:51,809 INFO L78 Accepts]: Start accepts. Automaton has 34694 states and 130756 transitions. Word has length 30 [2022-01-28 15:31:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 34694 states and 130756 transitions. [2022-01-28 15:31:51,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34694 states and 130756 transitions. [2022-01-28 15:31:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:51,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:51,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:51,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-28 15:31:52,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-28 15:31:52,090 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1834063801, now seen corresponding path program 52 times [2022-01-28 15:31:52,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:52,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752229779] [2022-01-28 15:31:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:52,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:52,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752229779] [2022-01-28 15:31:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752229779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645325842] [2022-01-28 15:31:52,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:31:52,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:52,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:52,348 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) [2022-01-28 15:31:52,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 15:31:52,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:31:52,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:31:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:31:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:52,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:31:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-28 15:31:52,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-28 15:31:52,853 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:31:52,854 INFO L388 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 32 treesize of output 23 [2022-01-28 15:31:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:52,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:53,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:31:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:53,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:31:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:53,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:53,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645325842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:53,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:53,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-28 15:31:53,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649315293] [2022-01-28 15:31:53,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:53,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:31:53,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:31:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:31:53,616 INFO L87 Difference]: Start difference. First operand 34694 states and 130756 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:31:55,931 INFO L93 Difference]: Finished difference Result 47375 states and 175651 transitions. [2022-01-28 15:31:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:31:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:31:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:31:56,146 INFO L225 Difference]: With dead ends: 47375 [2022-01-28 15:31:56,146 INFO L226 Difference]: Without dead ends: 47315 [2022-01-28 15:31:56,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=468, Invalid=2082, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 15:31:56,149 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 374 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:31:56,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 209 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:31:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47315 states. [2022-01-28 15:31:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47315 to 35196. [2022-01-28 15:31:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35196 states, 35195 states have (on average 3.7686319079414687) internal successors, (132637), 35195 states have internal predecessors, (132637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35196 states to 35196 states and 132637 transitions. [2022-01-28 15:31:57,310 INFO L78 Accepts]: Start accepts. Automaton has 35196 states and 132637 transitions. Word has length 30 [2022-01-28 15:31:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:31:57,310 INFO L470 AbstractCegarLoop]: Abstraction has 35196 states and 132637 transitions. [2022-01-28 15:31:57,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:31:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 35196 states and 132637 transitions. [2022-01-28 15:31:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:31:57,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:31:57,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:31:57,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-28 15:31:57,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:57,601 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:31:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:31:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash 708205217, now seen corresponding path program 53 times [2022-01-28 15:31:57,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:31:57,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024600861] [2022-01-28 15:31:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:31:57,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:31:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:31:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:57,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:31:57,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024600861] [2022-01-28 15:31:57,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024600861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:31:57,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16476145] [2022-01-28 15:31:57,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:31:57,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:31:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:31:57,963 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) [2022-01-28 15:31:57,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 15:31:57,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:31:57,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:31:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-28 15:31:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:31:58,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:31:58,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-28 15:31:58,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:31:58,443 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:31:58,444 INFO L388 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 32 treesize of output 23 [2022-01-28 15:31:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:58,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:31:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:58,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:58,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:59,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:31:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:31:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:31:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:31:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:31:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:31:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16476145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:31:59,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:31:59,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 28 [2022-01-28 15:31:59,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514263322] [2022-01-28 15:31:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:31:59,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:31:59,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:31:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:31:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:31:59,190 INFO L87 Difference]: Start difference. First operand 35196 states and 132637 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:32:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:32:09,537 INFO L93 Difference]: Finished difference Result 71053 states and 259605 transitions. [2022-01-28 15:32:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-28 15:32:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:32:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:32:09,784 INFO L225 Difference]: With dead ends: 71053 [2022-01-28 15:32:09,784 INFO L226 Difference]: Without dead ends: 70971 [2022-01-28 15:32:09,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7980 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2886, Invalid=17994, Unknown=0, NotChecked=0, Total=20880 [2022-01-28 15:32:09,785 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 795 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4772 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:32:09,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 793 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4772 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-28 15:32:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70971 states. [2022-01-28 15:32:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70971 to 38413. [2022-01-28 15:32:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 3.774341351660939) internal successors, (144980), 38412 states have internal predecessors, (144980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:32:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 144980 transitions. [2022-01-28 15:32:11,373 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 144980 transitions. Word has length 30 [2022-01-28 15:32:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:32:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 38413 states and 144980 transitions. [2022-01-28 15:32:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:32:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 144980 transitions. [2022-01-28 15:32:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:32:11,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:32:11,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:32:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 15:32:11,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:32:11,667 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:32:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:32:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1060580907, now seen corresponding path program 54 times [2022-01-28 15:32:11,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:32:11,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908079564] [2022-01-28 15:32:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:32:11,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:32:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:32:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:32:11,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:32:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908079564] [2022-01-28 15:32:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908079564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:32:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528644390] [2022-01-28 15:32:11,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:32:11,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:32:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:32:11,926 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) [2022-01-28 15:32:11,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 15:32:11,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:32:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:32:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:32:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:32:12,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:32:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-28 15:32:12,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:32:12,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-01-28 15:32:12,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-01-28 15:32:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:32:12,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:32:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2022-01-28 15:32:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2022-01-28 15:32:13,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:32:13,261 INFO L388 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 25 treesize of output 52 [2022-01-28 15:32:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:32:13,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:32:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:32:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-01-28 15:32:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:32:13,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528644390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:32:13,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:32:13,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-01-28 15:32:13,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554957923] [2022-01-28 15:32:13,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:32:13,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:32:13,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:32:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:32:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:32:13,443 INFO L87 Difference]: Start difference. First operand 38413 states and 144980 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:32:40,717 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:33:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:00,747 INFO L93 Difference]: Finished difference Result 66418 states and 243500 transitions. [2022-01-28 15:33:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-28 15:33:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:00,966 INFO L225 Difference]: With dead ends: 66418 [2022-01-28 15:33:00,967 INFO L226 Difference]: Without dead ends: 66332 [2022-01-28 15:33:00,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4930 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=2026, Invalid=13215, Unknown=11, NotChecked=0, Total=15252 [2022-01-28 15:33:00,967 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 484 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2923 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 5654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2649 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:00,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 749 Invalid, 5654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2923 Invalid, 0 Unknown, 2649 Unchecked, 1.6s Time] [2022-01-28 15:33:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66332 states. [2022-01-28 15:33:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66332 to 38828. [2022-01-28 15:33:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38828 states, 38827 states have (on average 3.776444226955469) internal successors, (146628), 38827 states have internal predecessors, (146628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38828 states to 38828 states and 146628 transitions. [2022-01-28 15:33:02,162 INFO L78 Accepts]: Start accepts. Automaton has 38828 states and 146628 transitions. Word has length 30 [2022-01-28 15:33:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:02,162 INFO L470 AbstractCegarLoop]: Abstraction has 38828 states and 146628 transitions. [2022-01-28 15:33:02,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38828 states and 146628 transitions. [2022-01-28 15:33:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:02,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:02,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:02,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-28 15:33:02,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:02,455 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:02,455 INFO L85 PathProgramCache]: Analyzing trace with hash -937383127, now seen corresponding path program 55 times [2022-01-28 15:33:02,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:02,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597163583] [2022-01-28 15:33:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:02,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:02,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597163583] [2022-01-28 15:33:02,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597163583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437940007] [2022-01-28 15:33:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:33:02,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:02,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:02,729 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) [2022-01-28 15:33:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 15:33:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:33:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:03,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:33:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:33:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:33:03,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:33:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:03,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:03,682 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:33:03,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 500 treesize of output 468 [2022-01-28 15:33:03,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:03,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:03,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:03,782 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:33:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:33:03,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:03,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:33:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:03,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437940007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:03,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:03,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-28 15:33:03,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736627162] [2022-01-28 15:33:03,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:03,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:33:03,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:33:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:33:03,908 INFO L87 Difference]: Start difference. First operand 38828 states and 146628 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-01-28 15:33:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:07,181 INFO L93 Difference]: Finished difference Result 57623 states and 212349 transitions. [2022-01-28 15:33:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-28 15:33:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:07,490 INFO L225 Difference]: With dead ends: 57623 [2022-01-28 15:33:07,490 INFO L226 Difference]: Without dead ends: 57575 [2022-01-28 15:33:07,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=714, Invalid=5138, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 15:33:07,491 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 467 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 3243 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:07,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 474 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3243 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:33:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57575 states. [2022-01-28 15:33:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57575 to 38887. [2022-01-28 15:33:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38887 states, 38886 states have (on average 3.775651905570128) internal successors, (146820), 38886 states have internal predecessors, (146820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38887 states to 38887 states and 146820 transitions. [2022-01-28 15:33:08,733 INFO L78 Accepts]: Start accepts. Automaton has 38887 states and 146820 transitions. Word has length 30 [2022-01-28 15:33:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:08,734 INFO L470 AbstractCegarLoop]: Abstraction has 38887 states and 146820 transitions. [2022-01-28 15:33:08,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-01-28 15:33:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38887 states and 146820 transitions. [2022-01-28 15:33:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:08,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:08,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:08,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-28 15:33:09,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-28 15:33:09,028 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1975940007, now seen corresponding path program 56 times [2022-01-28 15:33:09,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:09,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287933091] [2022-01-28 15:33:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:09,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:09,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287933091] [2022-01-28 15:33:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287933091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017360364] [2022-01-28 15:33:09,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:33:09,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:09,261 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) [2022-01-28 15:33:09,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 15:33:09,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:33:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:33:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:33:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:09,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:33:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:33:09,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:33:09,790 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-28 15:33:09,791 INFO L388 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 32 treesize of output 23 [2022-01-28 15:33:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:09,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:10,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:33:10,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2058 treesize of output 1962 [2022-01-28 15:33:10,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:10,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:33:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:10,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:10,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:33:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:10,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017360364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:10,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:33:10,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356075814] [2022-01-28 15:33:10,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:10,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:33:10,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:33:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:33:10,788 INFO L87 Difference]: Start difference. First operand 38887 states and 146820 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:17,747 INFO L93 Difference]: Finished difference Result 69809 states and 257085 transitions. [2022-01-28 15:33:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-28 15:33:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:18,002 INFO L225 Difference]: With dead ends: 69809 [2022-01-28 15:33:18,003 INFO L226 Difference]: Without dead ends: 69698 [2022-01-28 15:33:18,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1795, Invalid=11545, Unknown=0, NotChecked=0, Total=13340 [2022-01-28 15:33:18,004 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 609 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:18,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 892 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5115 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-28 15:33:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69698 states. [2022-01-28 15:33:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69698 to 40616. [2022-01-28 15:33:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40616 states, 40615 states have (on average 3.7807952726825063) internal successors, (153557), 40615 states have internal predecessors, (153557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40616 states to 40616 states and 153557 transitions. [2022-01-28 15:33:19,408 INFO L78 Accepts]: Start accepts. Automaton has 40616 states and 153557 transitions. Word has length 30 [2022-01-28 15:33:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:19,408 INFO L470 AbstractCegarLoop]: Abstraction has 40616 states and 153557 transitions. [2022-01-28 15:33:19,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 40616 states and 153557 transitions. [2022-01-28 15:33:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:19,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:19,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:19,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-28 15:33:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-28 15:33:19,896 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash -186128721, now seen corresponding path program 57 times [2022-01-28 15:33:19,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:19,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373178616] [2022-01-28 15:33:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:19,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:20,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373178616] [2022-01-28 15:33:20,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373178616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788101002] [2022-01-28 15:33:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:33:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:20,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:20,132 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) [2022-01-28 15:33:20,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 15:33:20,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:33:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:33:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:33:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:20,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:33:20,396 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-01-28 15:33:20,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:33:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:20,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2022-01-28 15:33:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:20,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:33:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:20,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:21,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:21,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 400 [2022-01-28 15:33:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:21,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 400 [2022-01-28 15:33:22,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:22,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 65 [2022-01-28 15:33:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:22,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-28 15:33:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:22,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788101002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:22,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:22,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-01-28 15:33:22,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483375739] [2022-01-28 15:33:22,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:22,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:33:22,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:22,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:33:22,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:33:22,336 INFO L87 Difference]: Start difference. First operand 40616 states and 153557 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:26,243 INFO L93 Difference]: Finished difference Result 76468 states and 276584 transitions. [2022-01-28 15:33:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:33:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:26,516 INFO L225 Difference]: With dead ends: 76468 [2022-01-28 15:33:26,516 INFO L226 Difference]: Without dead ends: 76438 [2022-01-28 15:33:26,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=882, Invalid=5598, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:33:26,516 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 138 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:26,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 377 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 626 Invalid, 0 Unknown, 532 Unchecked, 0.3s Time] [2022-01-28 15:33:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76438 states. [2022-01-28 15:33:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76438 to 40868. [2022-01-28 15:33:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40868 states, 40867 states have (on average 3.7811192404629654) internal successors, (154523), 40867 states have internal predecessors, (154523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40868 states to 40868 states and 154523 transitions. [2022-01-28 15:33:27,946 INFO L78 Accepts]: Start accepts. Automaton has 40868 states and 154523 transitions. Word has length 30 [2022-01-28 15:33:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:27,946 INFO L470 AbstractCegarLoop]: Abstraction has 40868 states and 154523 transitions. [2022-01-28 15:33:27,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 40868 states and 154523 transitions. [2022-01-28 15:33:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:28,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:28,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:28,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-28 15:33:28,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-28 15:33:28,255 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2142106547, now seen corresponding path program 58 times [2022-01-28 15:33:28,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:28,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738264286] [2022-01-28 15:33:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:28,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:28,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738264286] [2022-01-28 15:33:28,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738264286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306565941] [2022-01-28 15:33:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:33:28,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:28,689 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) [2022-01-28 15:33:28,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 15:33:28,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:33:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:33:28,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:33:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:33:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:28,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:33:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:29,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 15:33:29,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:33:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:29,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:33:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2058 treesize of output 1962 [2022-01-28 15:33:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:29,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:29,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:30,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:30,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:33:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:30,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:30,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:30,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:33:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:30,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306565941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:30,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:30,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-28 15:33:30,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666599636] [2022-01-28 15:33:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:30,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:33:30,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:33:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:33:30,132 INFO L87 Difference]: Start difference. First operand 40868 states and 154523 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:33,311 INFO L93 Difference]: Finished difference Result 50969 states and 188985 transitions. [2022-01-28 15:33:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-28 15:33:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:33,481 INFO L225 Difference]: With dead ends: 50969 [2022-01-28 15:33:33,481 INFO L226 Difference]: Without dead ends: 50931 [2022-01-28 15:33:33,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 15:33:33,482 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 257 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:33,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 565 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:33:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50931 states. [2022-01-28 15:33:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50931 to 40879. [2022-01-28 15:33:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40879 states, 40878 states have (on average 3.7804687117765057) internal successors, (154538), 40878 states have internal predecessors, (154538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40879 states to 40879 states and 154538 transitions. [2022-01-28 15:33:34,769 INFO L78 Accepts]: Start accepts. Automaton has 40879 states and 154538 transitions. Word has length 30 [2022-01-28 15:33:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:34,769 INFO L470 AbstractCegarLoop]: Abstraction has 40879 states and 154538 transitions. [2022-01-28 15:33:34,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 40879 states and 154538 transitions. [2022-01-28 15:33:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:34,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:34,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:34,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-28 15:33:35,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:35,075 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:35,076 INFO L85 PathProgramCache]: Analyzing trace with hash -168798025, now seen corresponding path program 59 times [2022-01-28 15:33:35,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:35,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981444464] [2022-01-28 15:33:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:35,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:35,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:35,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981444464] [2022-01-28 15:33:35,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981444464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:35,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474577754] [2022-01-28 15:33:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:33:35,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:35,327 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) [2022-01-28 15:33:35,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 15:33:35,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:33:35,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:33:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-28 15:33:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:33:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:33:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:35,641 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:33:35,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2022-01-28 15:33:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-28 15:33:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:35,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:36,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:36,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-28 15:33:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:33:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:36,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474577754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:36,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:36,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 28 [2022-01-28 15:33:36,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870929692] [2022-01-28 15:33:36,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:33:36,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:36,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:33:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:33:36,477 INFO L87 Difference]: Start difference. First operand 40879 states and 154538 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:33:43,528 INFO L93 Difference]: Finished difference Result 67495 states and 248804 transitions. [2022-01-28 15:33:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-28 15:33:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:33:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:33:43,764 INFO L225 Difference]: With dead ends: 67495 [2022-01-28 15:33:43,765 INFO L226 Difference]: Without dead ends: 67357 [2022-01-28 15:33:43,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1818, Invalid=11292, Unknown=0, NotChecked=0, Total=13110 [2022-01-28 15:33:43,765 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 548 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 3783 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:33:43,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 543 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3783 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-28 15:33:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67357 states. [2022-01-28 15:33:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67357 to 42376. [2022-01-28 15:33:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42376 states, 42375 states have (on average 3.7876342182890856) internal successors, (160501), 42375 states have internal predecessors, (160501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42376 states to 42376 states and 160501 transitions. [2022-01-28 15:33:45,404 INFO L78 Accepts]: Start accepts. Automaton has 42376 states and 160501 transitions. Word has length 30 [2022-01-28 15:33:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:33:45,404 INFO L470 AbstractCegarLoop]: Abstraction has 42376 states and 160501 transitions. [2022-01-28 15:33:45,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:33:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 42376 states and 160501 transitions. [2022-01-28 15:33:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:33:45,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:33:45,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:33:45,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-28 15:33:45,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:45,704 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:33:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:33:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 380956147, now seen corresponding path program 60 times [2022-01-28 15:33:45,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:33:45,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413044111] [2022-01-28 15:33:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:33:45,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:33:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:33:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:46,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:33:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413044111] [2022-01-28 15:33:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413044111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:33:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872424719] [2022-01-28 15:33:46,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:33:46,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:33:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:33:46,092 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) [2022-01-28 15:33:46,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 15:33:46,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 15:33:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:33:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-28 15:33:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:33:46,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:33:46,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-28 15:33:46,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:33:46,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:46,606 INFO L388 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 20 treesize of output 28 [2022-01-28 15:33:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:46,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:33:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:33:47,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 27 [2022-01-28 15:33:47,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:33:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:33:47,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2022-01-28 15:33:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:33:47,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872424719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:33:47,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:33:47,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2022-01-28 15:33:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456929929] [2022-01-28 15:33:47,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:33:47,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:33:47,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:33:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:33:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:33:47,739 INFO L87 Difference]: Start difference. First operand 42376 states and 160501 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:15,582 INFO L93 Difference]: Finished difference Result 93012 states and 342937 transitions. [2022-01-28 15:34:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2022-01-28 15:34:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:15,961 INFO L225 Difference]: With dead ends: 93012 [2022-01-28 15:34:15,961 INFO L226 Difference]: Without dead ends: 92766 [2022-01-28 15:34:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42561 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=8861, Invalid=95145, Unknown=0, NotChecked=0, Total=104006 [2022-01-28 15:34:15,965 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 967 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 6285 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 10751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 6285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4269 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:15,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 1990 Invalid, 10751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 6285 Invalid, 0 Unknown, 4269 Unchecked, 3.7s Time] [2022-01-28 15:34:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92766 states. [2022-01-28 15:34:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92766 to 43634. [2022-01-28 15:34:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43634 states, 43633 states have (on average 3.787339857447345) internal successors, (165253), 43633 states have internal predecessors, (165253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43634 states to 43634 states and 165253 transitions. [2022-01-28 15:34:17,877 INFO L78 Accepts]: Start accepts. Automaton has 43634 states and 165253 transitions. Word has length 30 [2022-01-28 15:34:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 43634 states and 165253 transitions. [2022-01-28 15:34:17,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 43634 states and 165253 transitions. [2022-01-28 15:34:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:17,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:17,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:17,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-28 15:34:18,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-28 15:34:18,179 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -226032337, now seen corresponding path program 61 times [2022-01-28 15:34:18,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869365401] [2022-01-28 15:34:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:18,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:18,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869365401] [2022-01-28 15:34:18,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869365401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541149316] [2022-01-28 15:34:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:34:18,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:18,479 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) [2022-01-28 15:34:18,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 15:34:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:34:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:18,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:34:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:18,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-28 15:34:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 15:34:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:34:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:19,459 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:34:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2058 treesize of output 1962 [2022-01-28 15:34:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:19,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,832 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:34:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-28 15:34:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:34:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541149316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:19,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:19,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-28 15:34:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627766277] [2022-01-28 15:34:19,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:19,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:34:19,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:34:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:34:19,943 INFO L87 Difference]: Start difference. First operand 43634 states and 165253 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:21,661 INFO L93 Difference]: Finished difference Result 51573 states and 193191 transitions. [2022-01-28 15:34:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:34:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:21,931 INFO L225 Difference]: With dead ends: 51573 [2022-01-28 15:34:21,931 INFO L226 Difference]: Without dead ends: 51543 [2022-01-28 15:34:21,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 15:34:21,932 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 217 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:21,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 381 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:34:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51543 states. [2022-01-28 15:34:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51543 to 43662. [2022-01-28 15:34:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43662 states, 43661 states have (on average 3.786514280479146) internal successors, (165323), 43661 states have internal predecessors, (165323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43662 states to 43662 states and 165323 transitions. [2022-01-28 15:34:23,158 INFO L78 Accepts]: Start accepts. Automaton has 43662 states and 165323 transitions. Word has length 30 [2022-01-28 15:34:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:23,158 INFO L470 AbstractCegarLoop]: Abstraction has 43662 states and 165323 transitions. [2022-01-28 15:34:23,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43662 states and 165323 transitions. [2022-01-28 15:34:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:23,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:23,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:23,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 15:34:23,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-28 15:34:23,459 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash 924959643, now seen corresponding path program 62 times [2022-01-28 15:34:23,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:23,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100183068] [2022-01-28 15:34:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:23,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:23,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100183068] [2022-01-28 15:34:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100183068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634764276] [2022-01-28 15:34:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:34:23,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:23,625 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) [2022-01-28 15:34:23,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 15:34:23,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:34:23,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:34:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:34:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:34:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-28 15:34:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2022-01-28 15:34:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:34:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:24,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:24,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,587 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:34:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:34:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:34:24,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:24,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:34:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634764276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:24,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:24,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 15:34:24,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485026356] [2022-01-28 15:34:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:24,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:34:24,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:34:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:34:24,770 INFO L87 Difference]: Start difference. First operand 43662 states and 165323 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:26,276 INFO L93 Difference]: Finished difference Result 52629 states and 196419 transitions. [2022-01-28 15:34:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:34:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:26,458 INFO L225 Difference]: With dead ends: 52629 [2022-01-28 15:34:26,458 INFO L226 Difference]: Without dead ends: 52575 [2022-01-28 15:34:26,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:34:26,458 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 182 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:26,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 233 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:34:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52575 states. [2022-01-28 15:34:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52575 to 43996. [2022-01-28 15:34:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43996 states, 43995 states have (on average 3.785202863961814) internal successors, (166530), 43995 states have internal predecessors, (166530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43996 states to 43996 states and 166530 transitions. [2022-01-28 15:34:27,740 INFO L78 Accepts]: Start accepts. Automaton has 43996 states and 166530 transitions. Word has length 30 [2022-01-28 15:34:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 43996 states and 166530 transitions. [2022-01-28 15:34:27,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 43996 states and 166530 transitions. [2022-01-28 15:34:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:27,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:27,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:27,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-28 15:34:28,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:28,056 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -899382837, now seen corresponding path program 63 times [2022-01-28 15:34:28,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:28,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324652378] [2022-01-28 15:34:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:28,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:28,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324652378] [2022-01-28 15:34:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324652378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620873717] [2022-01-28 15:34:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:34:28,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:28,204 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) [2022-01-28 15:34:28,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 15:34:28,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:34:28,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:34:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:34:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:28,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:34:28,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:34:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-01-28 15:34:28,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:34:28,716 INFO L388 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 24 treesize of output 32 [2022-01-28 15:34:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:29,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:29,545 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-28 15:34:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 110 [2022-01-28 15:34:29,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:34:29,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 353 [2022-01-28 15:34:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:30,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620873717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:30,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:30,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2022-01-28 15:34:30,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547068498] [2022-01-28 15:34:30,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:30,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:34:30,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:34:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:34:30,057 INFO L87 Difference]: Start difference. First operand 43996 states and 166530 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:33,891 INFO L93 Difference]: Finished difference Result 66367 states and 248577 transitions. [2022-01-28 15:34:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-28 15:34:33,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:34,147 INFO L225 Difference]: With dead ends: 66367 [2022-01-28 15:34:34,147 INFO L226 Difference]: Without dead ends: 66325 [2022-01-28 15:34:34,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=778, Invalid=7412, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:34:34,148 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 232 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:34,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 324 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1469 Invalid, 0 Unknown, 850 Unchecked, 0.7s Time] [2022-01-28 15:34:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66325 states. [2022-01-28 15:34:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66325 to 44123. [2022-01-28 15:34:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44123 states, 44122 states have (on average 3.7850732061103303) internal successors, (167005), 44122 states have internal predecessors, (167005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44123 states to 44123 states and 167005 transitions. [2022-01-28 15:34:35,676 INFO L78 Accepts]: Start accepts. Automaton has 44123 states and 167005 transitions. Word has length 30 [2022-01-28 15:34:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:35,677 INFO L470 AbstractCegarLoop]: Abstraction has 44123 states and 167005 transitions. [2022-01-28 15:34:35,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44123 states and 167005 transitions. [2022-01-28 15:34:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:35,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:35,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:35,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-28 15:34:35,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-28 15:34:35,986 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1259774415, now seen corresponding path program 64 times [2022-01-28 15:34:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:35,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093269699] [2022-01-28 15:34:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:35,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:36,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093269699] [2022-01-28 15:34:36,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093269699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015779560] [2022-01-28 15:34:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:34:36,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:36,185 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) [2022-01-28 15:34:36,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 15:34:36,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:34:36,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:34:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:34:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:36,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:34:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:36,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 15:34:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:36,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-28 15:34:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-01-28 15:34:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:36,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:36,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:36,896 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:34:36,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:34:36,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:36,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:34:36,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:36,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:36,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:34:36,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:37,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015779560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:37,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:37,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:34:37,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395411838] [2022-01-28 15:34:37,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:34:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:34:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:34:37,057 INFO L87 Difference]: Start difference. First operand 44123 states and 167005 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:38,986 INFO L93 Difference]: Finished difference Result 63372 states and 234411 transitions. [2022-01-28 15:34:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:34:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:39,334 INFO L225 Difference]: With dead ends: 63372 [2022-01-28 15:34:39,334 INFO L226 Difference]: Without dead ends: 63318 [2022-01-28 15:34:39,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=500, Invalid=3040, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:34:39,334 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 426 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:39,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 249 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:34:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63318 states. [2022-01-28 15:34:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63318 to 44100. [2022-01-28 15:34:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44100 states, 44099 states have (on average 3.785142520238554) internal successors, (166921), 44099 states have internal predecessors, (166921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44100 states to 44100 states and 166921 transitions. [2022-01-28 15:34:40,922 INFO L78 Accepts]: Start accepts. Automaton has 44100 states and 166921 transitions. Word has length 30 [2022-01-28 15:34:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 44100 states and 166921 transitions. [2022-01-28 15:34:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 44100 states and 166921 transitions. [2022-01-28 15:34:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:41,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:41,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:41,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-28 15:34:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-28 15:34:41,223 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1397620425, now seen corresponding path program 65 times [2022-01-28 15:34:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748921317] [2022-01-28 15:34:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:41,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:41,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748921317] [2022-01-28 15:34:41,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748921317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515467631] [2022-01-28 15:34:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:34:41,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:41,408 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) [2022-01-28 15:34:41,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 15:34:41,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:34:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:34:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:34:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:34:41,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 15:34:41,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-28 15:34:41,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:34:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:41,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:42,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:34:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2022-01-28 15:34:42,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:34:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:34:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:42,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:42,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515467631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:42,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-28 15:34:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467635168] [2022-01-28 15:34:42,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:34:42,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:34:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:34:42,567 INFO L87 Difference]: Start difference. First operand 44100 states and 166921 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:51,640 INFO L93 Difference]: Finished difference Result 75685 states and 272213 transitions. [2022-01-28 15:34:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-28 15:34:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:52,081 INFO L225 Difference]: With dead ends: 75685 [2022-01-28 15:34:52,081 INFO L226 Difference]: Without dead ends: 75304 [2022-01-28 15:34:52,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2848, Invalid=17744, Unknown=0, NotChecked=0, Total=20592 [2022-01-28 15:34:52,082 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 455 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 6217 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 6311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 6217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:52,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1503 Invalid, 6311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 6217 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-28 15:34:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75304 states. [2022-01-28 15:34:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75304 to 46271. [2022-01-28 15:34:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46271 states, 46270 states have (on average 3.789712556732224) internal successors, (175350), 46270 states have internal predecessors, (175350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46271 states to 46271 states and 175350 transitions. [2022-01-28 15:34:54,014 INFO L78 Accepts]: Start accepts. Automaton has 46271 states and 175350 transitions. Word has length 30 [2022-01-28 15:34:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:34:54,014 INFO L470 AbstractCegarLoop]: Abstraction has 46271 states and 175350 transitions. [2022-01-28 15:34:54,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46271 states and 175350 transitions. [2022-01-28 15:34:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:34:54,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:34:54,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:34:54,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-28 15:34:54,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 15:34:54,327 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:34:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:34:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1454873701, now seen corresponding path program 66 times [2022-01-28 15:34:54,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:34:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939399383] [2022-01-28 15:34:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:34:54,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:34:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:34:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:54,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:34:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939399383] [2022-01-28 15:34:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939399383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:34:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847748043] [2022-01-28 15:34:54,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:34:54,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:34:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:34:54,533 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) [2022-01-28 15:34:54,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 15:34:54,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:34:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:34:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:34:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:34:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:34:54,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:54,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-28 15:34:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-28 15:34:55,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:34:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:55,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:34:55,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:55,428 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:34:55,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:34:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:34:55,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:55,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:55,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:34:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:34:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:34:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:34:55,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847748043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:34:55,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:34:55,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:34:55,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018636591] [2022-01-28 15:34:55,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:34:55,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:34:55,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:34:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:34:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:34:55,937 INFO L87 Difference]: Start difference. First operand 46271 states and 175350 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:34:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:34:59,420 INFO L93 Difference]: Finished difference Result 56149 states and 209730 transitions. [2022-01-28 15:34:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:34:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:34:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:34:59,754 INFO L225 Difference]: With dead ends: 56149 [2022-01-28 15:34:59,755 INFO L226 Difference]: Without dead ends: 56041 [2022-01-28 15:34:59,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=832, Invalid=4718, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 15:34:59,755 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:34:59,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 297 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:34:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56041 states. [2022-01-28 15:35:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56041 to 46828. [2022-01-28 15:35:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46828 states, 46827 states have (on average 3.7882204710957352) internal successors, (177391), 46827 states have internal predecessors, (177391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46828 states to 46828 states and 177391 transitions. [2022-01-28 15:35:01,095 INFO L78 Accepts]: Start accepts. Automaton has 46828 states and 177391 transitions. Word has length 30 [2022-01-28 15:35:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:35:01,095 INFO L470 AbstractCegarLoop]: Abstraction has 46828 states and 177391 transitions. [2022-01-28 15:35:01,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46828 states and 177391 transitions. [2022-01-28 15:35:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:35:01,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:35:01,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:35:01,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-28 15:35:01,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-28 15:35:01,399 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:35:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:35:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1419641983, now seen corresponding path program 67 times [2022-01-28 15:35:01,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:35:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518900117] [2022-01-28 15:35:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:35:01,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:35:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:01,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:35:01,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518900117] [2022-01-28 15:35:01,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518900117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:35:01,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670899167] [2022-01-28 15:35:01,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:35:01,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:35:01,777 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) [2022-01-28 15:35:01,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 15:35:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:35:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:35:01,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:35:02,108 INFO L354 Elim1Store]: treesize reduction 62, result has 17.3 percent of original size [2022-01-28 15:35:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 83 [2022-01-28 15:35:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:02,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-28 15:35:02,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:35:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:02,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:35:02,566 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:35:02,566 INFO L388 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 48 treesize of output 71 [2022-01-28 15:35:02,572 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:35:02,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 176 [2022-01-28 15:35:02,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:35:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670899167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:35:02,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:35:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:35:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886563590] [2022-01-28 15:35:02,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:35:02,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:35:02,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:35:02,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:35:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:35:02,764 INFO L87 Difference]: Start difference. First operand 46828 states and 177391 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:35:04,616 INFO L93 Difference]: Finished difference Result 62409 states and 234998 transitions. [2022-01-28 15:35:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:35:04,617 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:35:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:35:04,841 INFO L225 Difference]: With dead ends: 62409 [2022-01-28 15:35:04,842 INFO L226 Difference]: Without dead ends: 62355 [2022-01-28 15:35:04,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 15:35:04,842 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 335 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:35:04,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 334 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:35:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62355 states. [2022-01-28 15:35:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62355 to 46914. [2022-01-28 15:35:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46914 states, 46913 states have (on average 3.787457634344425) internal successors, (177681), 46913 states have internal predecessors, (177681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46914 states to 46914 states and 177681 transitions. [2022-01-28 15:35:06,283 INFO L78 Accepts]: Start accepts. Automaton has 46914 states and 177681 transitions. Word has length 30 [2022-01-28 15:35:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:35:06,283 INFO L470 AbstractCegarLoop]: Abstraction has 46914 states and 177681 transitions. [2022-01-28 15:35:06,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46914 states and 177681 transitions. [2022-01-28 15:35:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:35:06,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:35:06,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:35:06,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-28 15:35:06,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:06,586 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:35:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:35:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash -740442085, now seen corresponding path program 68 times [2022-01-28 15:35:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:35:06,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917731039] [2022-01-28 15:35:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:35:06,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:35:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:06,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:35:06,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917731039] [2022-01-28 15:35:06,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917731039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:35:06,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522168206] [2022-01-28 15:35:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:35:06,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:35:06,799 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) [2022-01-28 15:35:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 15:35:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:35:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:35:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:35:06,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:35:06,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:35:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-28 15:35:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:07,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-01-28 15:35:07,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:35:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:07,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:35:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:07,778 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:35:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:35:07,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:07,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 434 treesize of output 402 [2022-01-28 15:35:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:07,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:35:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:08,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522168206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:35:08,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:35:08,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:35:08,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696648246] [2022-01-28 15:35:08,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:35:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:35:08,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:35:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:35:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:35:08,059 INFO L87 Difference]: Start difference. First operand 46914 states and 177681 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:35:12,300 INFO L93 Difference]: Finished difference Result 63496 states and 235104 transitions. [2022-01-28 15:35:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-28 15:35:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:35:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:35:12,541 INFO L225 Difference]: With dead ends: 63496 [2022-01-28 15:35:12,541 INFO L226 Difference]: Without dead ends: 63412 [2022-01-28 15:35:12,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=656, Invalid=4894, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 15:35:12,542 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 464 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 3314 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:35:12,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 684 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3314 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:35:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63412 states. [2022-01-28 15:35:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63412 to 47881. [2022-01-28 15:35:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47881 states, 47880 states have (on average 3.7865705931495404) internal successors, (181301), 47880 states have internal predecessors, (181301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47881 states to 47881 states and 181301 transitions. [2022-01-28 15:35:14,089 INFO L78 Accepts]: Start accepts. Automaton has 47881 states and 181301 transitions. Word has length 30 [2022-01-28 15:35:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:35:14,089 INFO L470 AbstractCegarLoop]: Abstraction has 47881 states and 181301 transitions. [2022-01-28 15:35:14,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 47881 states and 181301 transitions. [2022-01-28 15:35:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:35:14,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:35:14,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:35:14,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 15:35:14,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:14,388 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:35:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:35:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 5158911, now seen corresponding path program 69 times [2022-01-28 15:35:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:35:14,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738538963] [2022-01-28 15:35:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:35:14,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:35:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:14,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:35:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738538963] [2022-01-28 15:35:14,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738538963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:35:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807947429] [2022-01-28 15:35:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:35:14,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:35:14,541 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) [2022-01-28 15:35:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 15:35:14,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:35:14,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:35:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:35:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:35:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:35:15,059 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-01-28 15:35:15,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-28 15:35:15,221 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:35:15,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-01-28 15:35:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:15,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:35:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-01-28 15:35:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:35:16,748 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-01-28 15:35:16,748 INFO L388 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 103 treesize of output 100 [2022-01-28 15:35:16,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:35:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 320 [2022-01-28 15:35:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:17,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807947429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:35:17,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:35:17,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 35 [2022-01-28 15:35:17,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643993047] [2022-01-28 15:35:17,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:35:17,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-28 15:35:17,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:35:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-28 15:35:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:35:17,160 INFO L87 Difference]: Start difference. First operand 47881 states and 181301 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:35:23,195 INFO L93 Difference]: Finished difference Result 81037 states and 304054 transitions. [2022-01-28 15:35:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-28 15:35:23,195 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:35:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:35:23,479 INFO L225 Difference]: With dead ends: 81037 [2022-01-28 15:35:23,479 INFO L226 Difference]: Without dead ends: 80989 [2022-01-28 15:35:23,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1662, Invalid=9050, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:35:23,480 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 602 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 4525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2982 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:35:23,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 622 Invalid, 4525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1406 Invalid, 0 Unknown, 2982 Unchecked, 0.8s Time] [2022-01-28 15:35:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80989 states. [2022-01-28 15:35:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80989 to 48048. [2022-01-28 15:35:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48048 states, 48047 states have (on average 3.786438279184965) internal successors, (181927), 48047 states have internal predecessors, (181927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48048 states to 48048 states and 181927 transitions. [2022-01-28 15:35:25,138 INFO L78 Accepts]: Start accepts. Automaton has 48048 states and 181927 transitions. Word has length 30 [2022-01-28 15:35:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:35:25,138 INFO L470 AbstractCegarLoop]: Abstraction has 48048 states and 181927 transitions. [2022-01-28 15:35:25,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 48048 states and 181927 transitions. [2022-01-28 15:35:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:35:25,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:35:25,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:35:25,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-28 15:35:25,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:25,452 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:35:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:35:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2125009307, now seen corresponding path program 70 times [2022-01-28 15:35:25,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:35:25,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306092647] [2022-01-28 15:35:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:35:25,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:35:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:25,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:35:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306092647] [2022-01-28 15:35:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306092647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:35:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403944040] [2022-01-28 15:35:25,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:35:25,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:25,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:35:25,614 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) [2022-01-28 15:35:25,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 15:35:25,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:35:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:35:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:35:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:35:25,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:35:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-28 15:35:26,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-28 15:35:26,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:35:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:26,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:35:26,599 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:35:26,599 INFO L388 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 48 treesize of output 71 [2022-01-28 15:35:26,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:35:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 176 [2022-01-28 15:35:26,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:26,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:26,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:35:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403944040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:35:26,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:35:26,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 15:35:26,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852265487] [2022-01-28 15:35:26,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:35:26,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:35:26,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:35:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:35:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:35:26,796 INFO L87 Difference]: Start difference. First operand 48048 states and 181927 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:35:28,637 INFO L93 Difference]: Finished difference Result 63370 states and 238935 transitions. [2022-01-28 15:35:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 15:35:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:35:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:35:28,895 INFO L225 Difference]: With dead ends: 63370 [2022-01-28 15:35:28,895 INFO L226 Difference]: Without dead ends: 63328 [2022-01-28 15:35:28,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:35:28,895 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 221 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:35:28,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 283 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:35:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63328 states. [2022-01-28 15:35:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63328 to 48052. [2022-01-28 15:35:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48052 states, 48051 states have (on average 3.7862479448918855) internal successors, (181933), 48051 states have internal predecessors, (181933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48052 states to 48052 states and 181933 transitions. [2022-01-28 15:35:30,325 INFO L78 Accepts]: Start accepts. Automaton has 48052 states and 181933 transitions. Word has length 30 [2022-01-28 15:35:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:35:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 48052 states and 181933 transitions. [2022-01-28 15:35:30,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:35:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48052 states and 181933 transitions. [2022-01-28 15:35:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:35:30,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:35:30,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:35:30,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-28 15:35:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-28 15:35:30,638 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:35:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:35:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash 397130687, now seen corresponding path program 71 times [2022-01-28 15:35:30,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:35:30,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504313711] [2022-01-28 15:35:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:35:30,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:35:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:35:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:30,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:35:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504313711] [2022-01-28 15:35:30,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504313711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:35:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18214093] [2022-01-28 15:35:30,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:35:30,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:35:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:35:30,799 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) [2022-01-28 15:35:30,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 15:35:30,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:35:30,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:35:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:35:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:35:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:35:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:35:31,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2022-01-28 15:35:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:35:31,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2022-01-28 15:35:31,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:35:31,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:35:31,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 45 [2022-01-28 15:35:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:31,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:35:32,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:32,099 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-28 15:35:32,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 152 [2022-01-28 15:35:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:35:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1202 treesize of output 1106 [2022-01-28 15:35:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:35:32,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18214093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:35:32,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:35:32,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2022-01-28 15:35:32,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511053583] [2022-01-28 15:35:32,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:35:32,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:35:32,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:35:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:35:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:35:32,518 INFO L87 Difference]: Start difference. First operand 48052 states and 181933 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:20,084 INFO L93 Difference]: Finished difference Result 92065 states and 339972 transitions. [2022-01-28 15:36:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-28 15:36:20,085 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:36:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:20,446 INFO L225 Difference]: With dead ends: 92065 [2022-01-28 15:36:20,446 INFO L226 Difference]: Without dead ends: 91924 [2022-01-28 15:36:20,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15584 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=5399, Invalid=35605, Unknown=2, NotChecked=0, Total=41006 [2022-01-28 15:36:20,448 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 854 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 6183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2624 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:20,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 729 Invalid, 6183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3397 Invalid, 0 Unknown, 2624 Unchecked, 2.4s Time] [2022-01-28 15:36:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91924 states. [2022-01-28 15:36:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91924 to 49377. [2022-01-28 15:36:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49377 states, 49376 states have (on average 3.7826271872974724) internal successors, (186771), 49376 states have internal predecessors, (186771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49377 states to 49377 states and 186771 transitions. [2022-01-28 15:36:22,647 INFO L78 Accepts]: Start accepts. Automaton has 49377 states and 186771 transitions. Word has length 30 [2022-01-28 15:36:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:22,647 INFO L470 AbstractCegarLoop]: Abstraction has 49377 states and 186771 transitions. [2022-01-28 15:36:22,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 49377 states and 186771 transitions. [2022-01-28 15:36:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:36:22,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:22,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:36:22,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:22,960 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash -787437885, now seen corresponding path program 72 times [2022-01-28 15:36:22,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:22,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119910336] [2022-01-28 15:36:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:22,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:23,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119910336] [2022-01-28 15:36:23,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119910336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979879002] [2022-01-28 15:36:23,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:36:23,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:23,130 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) [2022-01-28 15:36:23,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 15:36:23,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:36:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:36:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:36:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:23,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-01-28 15:36:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:23,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 38 [2022-01-28 15:36:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:23,733 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-28 15:36:23,733 INFO L388 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 44 [2022-01-28 15:36:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:23,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:24,160 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:36:24,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:36:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:24,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 176 [2022-01-28 15:36:24,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:24,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:24,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:36:24,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:24,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:24,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:24,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979879002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:24,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:24,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:36:24,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761142577] [2022-01-28 15:36:24,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:24,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:36:24,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:36:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:36:24,361 INFO L87 Difference]: Start difference. First operand 49377 states and 186771 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:26,632 INFO L93 Difference]: Finished difference Result 68480 states and 254048 transitions. [2022-01-28 15:36:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:36:26,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:36:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:27,012 INFO L225 Difference]: With dead ends: 68480 [2022-01-28 15:36:27,012 INFO L226 Difference]: Without dead ends: 68426 [2022-01-28 15:36:27,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=3068, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:36:27,014 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 357 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:27,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 370 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:36:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68426 states. [2022-01-28 15:36:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68426 to 50297. [2022-01-28 15:36:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50297 states, 50296 states have (on average 3.780320502624463) internal successors, (190135), 50296 states have internal predecessors, (190135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50297 states to 50297 states and 190135 transitions. [2022-01-28 15:36:28,739 INFO L78 Accepts]: Start accepts. Automaton has 50297 states and 190135 transitions. Word has length 30 [2022-01-28 15:36:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:28,739 INFO L470 AbstractCegarLoop]: Abstraction has 50297 states and 190135 transitions. [2022-01-28 15:36:28,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50297 states and 190135 transitions. [2022-01-28 15:36:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:36:28,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:28,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:36:28,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:29,056 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:29,057 INFO L85 PathProgramCache]: Analyzing trace with hash 180622321, now seen corresponding path program 73 times [2022-01-28 15:36:29,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962469068] [2022-01-28 15:36:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:29,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:29,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962469068] [2022-01-28 15:36:29,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962469068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720042146] [2022-01-28 15:36:29,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:36:29,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:29,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:29,212 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) [2022-01-28 15:36:29,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 15:36:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:36:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:29,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:36:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-01-28 15:36:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:29,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-28 15:36:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:36:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:29,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:29,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:29,937 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:36:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:36:29,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:29,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 176 [2022-01-28 15:36:30,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:30,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:36:30,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720042146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:30,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 15:36:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795377594] [2022-01-28 15:36:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:30,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:36:30,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:36:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:36:30,166 INFO L87 Difference]: Start difference. First operand 50297 states and 190135 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:33,045 INFO L93 Difference]: Finished difference Result 61443 states and 228421 transitions. [2022-01-28 15:36:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 15:36:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:36:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:33,270 INFO L225 Difference]: With dead ends: 61443 [2022-01-28 15:36:33,271 INFO L226 Difference]: Without dead ends: 61413 [2022-01-28 15:36:33,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=320, Invalid=2760, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 15:36:33,271 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 239 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:33,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 696 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:36:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61413 states. [2022-01-28 15:36:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61413 to 50834. [2022-01-28 15:36:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50834 states, 50833 states have (on average 3.7809690555347903) internal successors, (192198), 50833 states have internal predecessors, (192198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50834 states to 50834 states and 192198 transitions. [2022-01-28 15:36:34,946 INFO L78 Accepts]: Start accepts. Automaton has 50834 states and 192198 transitions. Word has length 30 [2022-01-28 15:36:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:34,946 INFO L470 AbstractCegarLoop]: Abstraction has 50834 states and 192198 transitions. [2022-01-28 15:36:34,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50834 states and 192198 transitions. [2022-01-28 15:36:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:36:35,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:35,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:36:35,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:35,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-28 15:36:35,251 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 634691667, now seen corresponding path program 74 times [2022-01-28 15:36:35,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022262218] [2022-01-28 15:36:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:35,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022262218] [2022-01-28 15:36:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022262218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729715426] [2022-01-28 15:36:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:36:35,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:35,457 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) [2022-01-28 15:36:35,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 15:36:35,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:36:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:36:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:35,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:36:35,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:36:35,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:36:35,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:36:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:36,314 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:36:36,314 INFO L388 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 48 treesize of output 71 [2022-01-28 15:36:36,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:36:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 434 treesize of output 402 [2022-01-28 15:36:36,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:36:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:36:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:36,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729715426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:36,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:36,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-28 15:36:36,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307344207] [2022-01-28 15:36:36,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:36,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:36:36,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:36:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:36:36,476 INFO L87 Difference]: Start difference. First operand 50834 states and 192198 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:37,782 INFO L93 Difference]: Finished difference Result 61805 states and 230783 transitions. [2022-01-28 15:36:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:36:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:36:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:37,990 INFO L225 Difference]: With dead ends: 61805 [2022-01-28 15:36:37,990 INFO L226 Difference]: Without dead ends: 61763 [2022-01-28 15:36:37,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 15:36:37,991 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 239 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:37,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 294 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 15:36:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61763 states. [2022-01-28 15:36:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61763 to 50888. [2022-01-28 15:36:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50888 states, 50887 states have (on average 3.7812800911824236) internal successors, (192418), 50887 states have internal predecessors, (192418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50888 states to 50888 states and 192418 transitions. [2022-01-28 15:36:39,740 INFO L78 Accepts]: Start accepts. Automaton has 50888 states and 192418 transitions. Word has length 30 [2022-01-28 15:36:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:36:39,740 INFO L470 AbstractCegarLoop]: Abstraction has 50888 states and 192418 transitions. [2022-01-28 15:36:39,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 50888 states and 192418 transitions. [2022-01-28 15:36:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:36:39,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:36:39,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:36:39,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-28 15:36:40,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-28 15:36:40,078 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:36:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:36:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1149648553, now seen corresponding path program 75 times [2022-01-28 15:36:40,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:36:40,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319037780] [2022-01-28 15:36:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:36:40,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:36:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:36:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:40,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:36:40,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319037780] [2022-01-28 15:36:40,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319037780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:36:40,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240604145] [2022-01-28 15:36:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:36:40,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:36:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:36:40,258 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) [2022-01-28 15:36:40,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 15:36:40,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:36:40,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:36:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:36:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:36:40,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:36:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:36:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:36:40,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:40,663 INFO L388 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 21 treesize of output 29 [2022-01-28 15:36:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:40,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:36:41,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:36:41,585 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-28 15:36:41,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 110 [2022-01-28 15:36:41,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:36:41,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 369 [2022-01-28 15:36:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:36:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240604145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:36:41,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:36:41,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2022-01-28 15:36:41,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794442277] [2022-01-28 15:36:41,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:36:41,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:36:41,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:36:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:36:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:36:41,886 INFO L87 Difference]: Start difference. First operand 50888 states and 192418 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:36:55,950 WARN L227 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:36:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:36:59,009 INFO L93 Difference]: Finished difference Result 70748 states and 265928 transitions. [2022-01-28 15:36:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-28 15:36:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:36:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:36:59,252 INFO L225 Difference]: With dead ends: 70748 [2022-01-28 15:36:59,253 INFO L226 Difference]: Without dead ends: 70706 [2022-01-28 15:36:59,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3215 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1084, Invalid=9836, Unknown=0, NotChecked=0, Total=10920 [2022-01-28 15:36:59,254 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 297 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:36:59,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 493 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1876 Invalid, 0 Unknown, 1303 Unchecked, 0.8s Time] [2022-01-28 15:36:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70706 states. [2022-01-28 15:37:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70706 to 51120. [2022-01-28 15:37:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51120 states, 51119 states have (on average 3.782155362976584) internal successors, (193340), 51119 states have internal predecessors, (193340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51120 states to 51120 states and 193340 transitions. [2022-01-28 15:37:00,904 INFO L78 Accepts]: Start accepts. Automaton has 51120 states and 193340 transitions. Word has length 30 [2022-01-28 15:37:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:37:00,904 INFO L470 AbstractCegarLoop]: Abstraction has 51120 states and 193340 transitions. [2022-01-28 15:37:00,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51120 states and 193340 transitions. [2022-01-28 15:37:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:37:01,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:37:01,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:37:01,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-28 15:37:01,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:01,211 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:37:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:37:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1077504323, now seen corresponding path program 76 times [2022-01-28 15:37:01,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:37:01,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899046453] [2022-01-28 15:37:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:37:01,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:37:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:01,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:37:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899046453] [2022-01-28 15:37:01,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899046453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:37:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11666555] [2022-01-28 15:37:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:37:01,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:37:01,416 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) [2022-01-28 15:37:01,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 15:37:01,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:37:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:37:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:37:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:37:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:37:01,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:01,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 15:37:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-28 15:37:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:37:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:37:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:37:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2022-01-28 15:37:02,256 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:37:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 394 treesize of output 362 [2022-01-28 15:37:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:02,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:37:02,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:02,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11666555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:37:02,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:37:02,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-28 15:37:02,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169051095] [2022-01-28 15:37:02,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:37:02,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:37:02,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:37:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:37:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:37:02,490 INFO L87 Difference]: Start difference. First operand 51120 states and 193340 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:37:05,502 INFO L93 Difference]: Finished difference Result 65582 states and 243460 transitions. [2022-01-28 15:37:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 15:37:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:37:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:37:05,717 INFO L225 Difference]: With dead ends: 65582 [2022-01-28 15:37:05,717 INFO L226 Difference]: Without dead ends: 65546 [2022-01-28 15:37:05,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=468, Invalid=3072, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:37:05,718 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 394 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:37:05,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 432 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:37:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65546 states. [2022-01-28 15:37:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65546 to 53130. [2022-01-28 15:37:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53130 states, 53129 states have (on average 3.7819646520732557) internal successors, (200932), 53129 states have internal predecessors, (200932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53130 states to 53130 states and 200932 transitions. [2022-01-28 15:37:07,447 INFO L78 Accepts]: Start accepts. Automaton has 53130 states and 200932 transitions. Word has length 30 [2022-01-28 15:37:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:37:07,447 INFO L470 AbstractCegarLoop]: Abstraction has 53130 states and 200932 transitions. [2022-01-28 15:37:07,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 53130 states and 200932 transitions. [2022-01-28 15:37:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:37:07,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:37:07,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:37:07,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-28 15:37:07,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:07,779 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:37:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:37:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -487800059, now seen corresponding path program 77 times [2022-01-28 15:37:07,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:37:07,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983505454] [2022-01-28 15:37:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:37:07,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:37:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:07,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:37:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983505454] [2022-01-28 15:37:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983505454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:37:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389633235] [2022-01-28 15:37:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:37:07,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:37:07,969 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) [2022-01-28 15:37:07,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 15:37:08,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:37:08,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:37:08,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:37:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:37:08,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:37:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:37:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2022-01-28 15:37:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,391 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:37:08,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 53 [2022-01-28 15:37:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:08,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:37:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2022-01-28 15:37:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:08,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:37:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:09,251 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:37:09,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 118 [2022-01-28 15:37:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:09,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 879 treesize of output 815 [2022-01-28 15:37:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:09,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389633235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:37:09,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:37:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-01-28 15:37:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506427578] [2022-01-28 15:37:09,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:37:09,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:37:09,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:37:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:37:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:37:09,757 INFO L87 Difference]: Start difference. First operand 53130 states and 200932 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:37:36,451 INFO L93 Difference]: Finished difference Result 98373 states and 357819 transitions. [2022-01-28 15:37:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2022-01-28 15:37:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:37:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:37:36,857 INFO L225 Difference]: With dead ends: 98373 [2022-01-28 15:37:36,857 INFO L226 Difference]: Without dead ends: 98281 [2022-01-28 15:37:36,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 43559 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=10963, Invalid=87947, Unknown=0, NotChecked=0, Total=98910 [2022-01-28 15:37:36,861 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 849 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 7300 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 8646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 7300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1092 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:37:36,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1012 Invalid, 8646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 7300 Invalid, 0 Unknown, 1092 Unchecked, 4.3s Time] [2022-01-28 15:37:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98281 states. [2022-01-28 15:37:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98281 to 53927. [2022-01-28 15:37:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53927 states, 53926 states have (on average 3.7814226903534474) internal successors, (203917), 53926 states have internal predecessors, (203917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53927 states to 53927 states and 203917 transitions. [2022-01-28 15:37:39,223 INFO L78 Accepts]: Start accepts. Automaton has 53927 states and 203917 transitions. Word has length 30 [2022-01-28 15:37:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:37:39,223 INFO L470 AbstractCegarLoop]: Abstraction has 53927 states and 203917 transitions. [2022-01-28 15:37:39,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53927 states and 203917 transitions. [2022-01-28 15:37:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:37:39,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:37:39,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:37:39,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 15:37:39,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-28 15:37:39,540 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:37:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:37:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash -526959323, now seen corresponding path program 78 times [2022-01-28 15:37:39,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:37:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158208126] [2022-01-28 15:37:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:37:39,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:37:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:39,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:37:39,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158208126] [2022-01-28 15:37:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158208126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:37:39,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209375892] [2022-01-28 15:37:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:37:39,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:37:39,774 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) [2022-01-28 15:37:39,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 15:37:39,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:37:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:37:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:37:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:37:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:37:40,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:37:40,183 INFO L388 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 29 treesize of output 37 [2022-01-28 15:37:40,192 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-28 15:37:40,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-28 15:37:40,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:40,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:40,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:37:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:40,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:37:40,829 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:37:40,829 INFO L388 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 89 treesize of output 110 [2022-01-28 15:37:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 361 [2022-01-28 15:37:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209375892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:37:41,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:37:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-28 15:37:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274120438] [2022-01-28 15:37:41,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:37:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:37:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:37:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:37:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:37:41,386 INFO L87 Difference]: Start difference. First operand 53927 states and 203917 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:37:52,971 INFO L93 Difference]: Finished difference Result 92379 states and 340461 transitions. [2022-01-28 15:37:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-28 15:37:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:37:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:37:53,306 INFO L225 Difference]: With dead ends: 92379 [2022-01-28 15:37:53,307 INFO L226 Difference]: Without dead ends: 92313 [2022-01-28 15:37:53,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12389 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3358, Invalid=29948, Unknown=0, NotChecked=0, Total=33306 [2022-01-28 15:37:53,308 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 875 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 4349 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 4349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:37:53,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 754 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 4349 Invalid, 0 Unknown, 1015 Unchecked, 2.2s Time] [2022-01-28 15:37:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92313 states. [2022-01-28 15:37:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92313 to 53971. [2022-01-28 15:37:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53971 states, 53970 states have (on average 3.7810635538261996) internal successors, (204064), 53970 states have internal predecessors, (204064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53971 states to 53971 states and 204064 transitions. [2022-01-28 15:37:55,446 INFO L78 Accepts]: Start accepts. Automaton has 53971 states and 204064 transitions. Word has length 30 [2022-01-28 15:37:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:37:55,446 INFO L470 AbstractCegarLoop]: Abstraction has 53971 states and 204064 transitions. [2022-01-28 15:37:55,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 53971 states and 204064 transitions. [2022-01-28 15:37:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:37:55,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:37:55,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:37:55,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-28 15:37:55,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:55,779 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:37:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:37:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1427333893, now seen corresponding path program 79 times [2022-01-28 15:37:55,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:37:55,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524417638] [2022-01-28 15:37:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:37:55,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:37:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:56,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:37:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524417638] [2022-01-28 15:37:56,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524417638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:37:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769544091] [2022-01-28 15:37:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:37:56,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:37:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:37:56,069 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) [2022-01-28 15:37:56,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 15:37:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:37:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:37:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:37:56,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:37:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:56,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-28 15:37:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:37:56,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:37:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:56,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:37:56,681 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:37:56,681 INFO L388 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 48 treesize of output 71 [2022-01-28 15:37:56,685 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:37:56,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:37:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:56,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:56,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:37:56,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:37:56,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:37:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:37:56,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769544091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:37:56,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:37:56,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-28 15:37:56,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53782885] [2022-01-28 15:37:56,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:37:56,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:37:56,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:37:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:37:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:37:56,826 INFO L87 Difference]: Start difference. First operand 53971 states and 204064 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:37:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:37:59,279 INFO L93 Difference]: Finished difference Result 71101 states and 267700 transitions. [2022-01-28 15:37:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:37:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:37:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:37:59,557 INFO L225 Difference]: With dead ends: 71101 [2022-01-28 15:37:59,557 INFO L226 Difference]: Without dead ends: 71023 [2022-01-28 15:37:59,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:37:59,558 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 415 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:37:59,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 306 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:37:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71023 states. [2022-01-28 15:38:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71023 to 54057. [2022-01-28 15:38:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54057 states, 54056 states have (on average 3.780634897143703) internal successors, (204366), 54056 states have internal predecessors, (204366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54057 states to 54057 states and 204366 transitions. [2022-01-28 15:38:01,304 INFO L78 Accepts]: Start accepts. Automaton has 54057 states and 204366 transitions. Word has length 30 [2022-01-28 15:38:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:38:01,304 INFO L470 AbstractCegarLoop]: Abstraction has 54057 states and 204366 transitions. [2022-01-28 15:38:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 54057 states and 204366 transitions. [2022-01-28 15:38:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:38:01,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:38:01,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:38:01,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 15:38:01,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:01,640 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:38:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:38:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -345493409, now seen corresponding path program 80 times [2022-01-28 15:38:01,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:38:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648662559] [2022-01-28 15:38:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:38:01,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:38:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:38:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:01,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:38:01,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648662559] [2022-01-28 15:38:01,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648662559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:38:01,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758106424] [2022-01-28 15:38:01,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:38:01,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:01,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:38:01,880 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) [2022-01-28 15:38:01,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 15:38:01,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:38:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:38:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:38:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:38:02,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-28 15:38:02,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:38:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:38:02,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-28 15:38:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:02,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:38:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:02,969 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-28 15:38:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 71 [2022-01-28 15:38:02,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2022-01-28 15:38:03,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:03,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:03,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:38:03,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:03,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:38:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:03,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758106424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:38:03,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:38:03,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 15:38:03,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689126124] [2022-01-28 15:38:03,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:38:03,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:38:03,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:38:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:38:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:38:03,272 INFO L87 Difference]: Start difference. First operand 54057 states and 204366 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:38:09,118 INFO L93 Difference]: Finished difference Result 111185 states and 412231 transitions. [2022-01-28 15:38:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-28 15:38:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:38:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:38:09,593 INFO L225 Difference]: With dead ends: 111185 [2022-01-28 15:38:09,593 INFO L226 Difference]: Without dead ends: 111025 [2022-01-28 15:38:09,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1784, Invalid=10648, Unknown=0, NotChecked=0, Total=12432 [2022-01-28 15:38:09,594 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 747 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:38:09,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 700 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3554 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-28 15:38:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111025 states. [2022-01-28 15:38:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111025 to 55358. [2022-01-28 15:38:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55358 states, 55357 states have (on average 3.7841826688585) internal successors, (209481), 55357 states have internal predecessors, (209481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55358 states to 55358 states and 209481 transitions. [2022-01-28 15:38:12,035 INFO L78 Accepts]: Start accepts. Automaton has 55358 states and 209481 transitions. Word has length 30 [2022-01-28 15:38:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:38:12,035 INFO L470 AbstractCegarLoop]: Abstraction has 55358 states and 209481 transitions. [2022-01-28 15:38:12,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand 55358 states and 209481 transitions. [2022-01-28 15:38:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:38:12,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:38:12,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:38:12,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-28 15:38:12,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-01-28 15:38:12,360 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:38:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:38:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 6882281, now seen corresponding path program 81 times [2022-01-28 15:38:12,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:38:12,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950557350] [2022-01-28 15:38:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:38:12,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:38:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:38:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:12,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:38:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950557350] [2022-01-28 15:38:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950557350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:38:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067132825] [2022-01-28 15:38:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:38:12,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:38:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:38:12,587 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) [2022-01-28 15:38:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 15:38:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:38:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:38:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-28 15:38:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:38:12,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:38:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-28 15:38:13,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:13,018 INFO L388 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 41 [2022-01-28 15:38:13,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:13,102 INFO L388 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 42 treesize of output 48 [2022-01-28 15:38:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:13,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:38:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:38:14,650 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2022-01-28 15:38:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 116 [2022-01-28 15:38:14,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:38:14,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 349 [2022-01-28 15:38:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:38:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067132825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:38:15,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:38:15,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-01-28 15:38:15,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521056391] [2022-01-28 15:38:15,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:38:15,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:38:15,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:38:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:38:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:38:15,370 INFO L87 Difference]: Start difference. First operand 55358 states and 209481 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:38:24,967 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 121 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:38:59,845 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 106 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:39:12,397 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:39:33,978 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-28 15:39:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:48,147 INFO L93 Difference]: Finished difference Result 93582 states and 347382 transitions. [2022-01-28 15:39:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-28 15:39:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:39:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:48,521 INFO L225 Difference]: With dead ends: 93582 [2022-01-28 15:39:48,521 INFO L226 Difference]: Without dead ends: 93522 [2022-01-28 15:39:48,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 63 SyntacticMatches, 16 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18050 ImplicationChecksByTransitivity, 91.6s TimeCoverageRelationStatistics Valid=5919, Invalid=38809, Unknown=4, NotChecked=0, Total=44732 [2022-01-28 15:39:48,523 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 804 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 5829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4100 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:48,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 507 Invalid, 5829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1567 Invalid, 0 Unknown, 4100 Unchecked, 1.0s Time] [2022-01-28 15:39:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93522 states. [2022-01-28 15:39:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93522 to 55936. [2022-01-28 15:39:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55936 states, 55935 states have (on average 3.781120943952802) internal successors, (211497), 55935 states have internal predecessors, (211497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55936 states to 55936 states and 211497 transitions. [2022-01-28 15:39:50,683 INFO L78 Accepts]: Start accepts. Automaton has 55936 states and 211497 transitions. Word has length 30 [2022-01-28 15:39:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:50,683 INFO L470 AbstractCegarLoop]: Abstraction has 55936 states and 211497 transitions. [2022-01-28 15:39:50,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 55936 states and 211497 transitions. [2022-01-28 15:39:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:39:50,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:50,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:50,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:51,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:51,020 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1704127225, now seen corresponding path program 82 times [2022-01-28 15:39:51,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081438486] [2022-01-28 15:39:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:51,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:51,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081438486] [2022-01-28 15:39:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081438486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866690086] [2022-01-28 15:39:51,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:51,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:51,231 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) [2022-01-28 15:39:51,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 15:39:51,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:39:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:51,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:39:51,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:51,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-28 15:39:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2022-01-28 15:39:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-28 15:39:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:51,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:52,224 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:39:52,224 INFO L388 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 48 treesize of output 71 [2022-01-28 15:39:52,230 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:39:52,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 176 [2022-01-28 15:39:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:52,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:39:52,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:52,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866690086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:52,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:52,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-28 15:39:52,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973816686] [2022-01-28 15:39:52,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:52,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:39:52,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:39:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:39:52,419 INFO L87 Difference]: Start difference. First operand 55936 states and 211497 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:55,064 INFO L93 Difference]: Finished difference Result 73447 states and 276563 transitions. [2022-01-28 15:39:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:39:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:39:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:55,354 INFO L225 Difference]: With dead ends: 73447 [2022-01-28 15:39:55,354 INFO L226 Difference]: Without dead ends: 73393 [2022-01-28 15:39:55,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:39:55,355 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 545 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:55,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 264 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:39:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73393 states. [2022-01-28 15:39:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73393 to 55863. [2022-01-28 15:39:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55863 states, 55862 states have (on average 3.781586767391071) internal successors, (211247), 55862 states have internal predecessors, (211247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55863 states to 55863 states and 211247 transitions. [2022-01-28 15:39:57,140 INFO L78 Accepts]: Start accepts. Automaton has 55863 states and 211247 transitions. Word has length 30 [2022-01-28 15:39:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 55863 states and 211247 transitions. [2022-01-28 15:39:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 55863 states and 211247 transitions. [2022-01-28 15:39:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:39:57,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:57,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:57,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:57,486 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 937818309, now seen corresponding path program 83 times [2022-01-28 15:39:57,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427888871] [2022-01-28 15:39:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:57,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:57,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427888871] [2022-01-28 15:39:57,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427888871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895243980] [2022-01-28 15:39:57,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:57,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:57,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:57,718 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) [2022-01-28 15:39:57,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 15:39:57,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:39:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:39:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-28 15:39:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:58,491 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:39:58,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-01-28 15:39:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-28 15:39:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:58,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:58,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:58,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2022-01-28 15:39:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:58,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:59,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 99 [2022-01-28 15:39:59,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 15:39:59,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:39:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895243980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:59,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:59,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 31 [2022-01-28 15:39:59,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827858416] [2022-01-28 15:39:59,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:59,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:39:59,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:39:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:39:59,375 INFO L87 Difference]: Start difference. First operand 55863 states and 211247 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-28 15:40:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2022-01-28 15:40:24,893 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 [2022-01-28 15:40:24,893 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:40:24,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25458 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=7924, Invalid=54826, Unknown=0, NotChecked=0, Total=62750 [2022-01-28 15:40:24,896 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 842 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:24,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 545 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 4607 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-28 15:40:24,897 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 15:40:24,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:25,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-28 15:40:25,107 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (55863states) and FLOYD_HOARE automaton (currently 232 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 251 known predicates. [2022-01-28 15:40:25,109 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 15:40:25,109 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 15:40:25,109 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 15:40:25,112 INFO L732 BasicCegarLoop]: Path program histogram: [83, 2, 1, 1, 1] [2022-01-28 15:40:25,113 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 15:40:25,113 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 15:40:25,115 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:40:25 BasicIcfg [2022-01-28 15:40:25,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 15:40:25,115 INFO L158 Benchmark]: Toolchain (without parser) took 848949.87ms. Allocated memory was 167.8MB in the beginning and 7.0GB in the end (delta: 6.9GB). Free memory was 131.8MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 167.8MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.22ms. Allocated memory is still 167.8MB. Free memory was 131.7MB in the beginning and 130.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 INFO L158 Benchmark]: Boogie Preprocessor took 10.66ms. Allocated memory is still 167.8MB. Free memory was 130.2MB in the beginning and 129.2MB in the end (delta: 963.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 INFO L158 Benchmark]: RCFGBuilder took 200.17ms. Allocated memory is still 167.8MB. Free memory was 129.2MB in the beginning and 119.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 INFO L158 Benchmark]: TraceAbstraction took 848710.28ms. Allocated memory was 167.8MB in the beginning and 7.0GB in the end (delta: 6.9GB). Free memory was 119.2MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-01-28 15:40:25,115 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 0.10ms. Allocated memory is still 167.8MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.22ms. Allocated memory is still 167.8MB. Free memory was 131.7MB in the beginning and 130.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.66ms. Allocated memory is still 167.8MB. Free memory was 130.2MB in the beginning and 129.2MB in the end (delta: 963.3kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 200.17ms. Allocated memory is still 167.8MB. Free memory was 129.2MB in the beginning and 119.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 848710.28ms. Allocated memory was 167.8MB in the beginning and 7.0GB in the end (delta: 6.9GB). Free memory was 119.2MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (55863states) and FLOYD_HOARE automaton (currently 232 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 251 known predicates. - TimeoutResultAtElement [Line: 61]: 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 (55863states) and FLOYD_HOARE automaton (currently 232 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 251 known predicates. - TimeoutResultAtElement [Line: 62]: 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 (55863states) and FLOYD_HOARE automaton (currently 232 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 251 known predicates. - TimeoutResultAtElement [Line: 61]: 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 (55863states) and FLOYD_HOARE automaton (currently 232 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 251 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 848.6s, OverallIterations: 88, TraceHistogramMax: 2, PathProgramHistogramMax: 83, EmptinessCheckTime: 4.4s, AutomataDifference: 629.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33657 SdHoareTripleChecker+Valid, 98.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33657 mSDsluCounter, 38557 SdHoareTripleChecker+Invalid, 83.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 46628 IncrementalHoareTripleChecker+Unchecked, 74563 mSDsCounter, 6814 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189371 IncrementalHoareTripleChecker+Invalid, 242813 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6814 mSolverCounterUnsat, 2705 mSDtfsCounter, 189371 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10844 GetRequests, 3625 SyntacticMatches, 301 SemanticMatches, 6917 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 327390 ImplicationChecksByTransitivity, 532.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55936occurred in iteration=86, InterpolantAutomatonStates: 5886, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 66.9s AutomataMinimizationTime, 87 MinimizatonAttempts, 1205317 StatesRemovedByMinimization, 86 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 125.0s InterpolantComputationTime, 4995 NumberOfCodeBlocks, 4995 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 7208 ConstructedInterpolants, 274 QuantifiedInterpolants, 172631 SizeOfPredicates, 771 NumberOfNonLiveVariables, 7011 ConjunctsInSsa, 2621 ConjunctsInUnsatCore, 258 InterpolantComputations, 3 PerfectInterpolantSequences, 153/2999 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