/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:17:35,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:17:35,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:17:35,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:17:35,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 14:17:35,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:17:35,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:17:35,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:17:35,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:17:35,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:17:35,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:17:35,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:17:35,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:17:35,575 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:17:35,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:17:35,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:17:35,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:17:35,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:17:35,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:17:35,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:17:35,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:17:35,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:17:35,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:17:35,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:17:35,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:17:35,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:17:35,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:17:35,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:17:35,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:17:35,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:17:35,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:17:35,579 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:17:35,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:17:35,580 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:17:35,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:17:35,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:17:35,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:17:35,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:17:35,764 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:17:35,766 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:17:35,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2022-01-18 14:17:35,768 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2022-01-18 14:17:35,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:17:35,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:17:35,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:17:35,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:17:35,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:17:35,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,813 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:17:35,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:17:35,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:17:35,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:17:35,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:17:35,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:17:35,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:17:35,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:17:35,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:17:35,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/1) ... [2022-01-18 14:17:35,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:17:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:35,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 14:17:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 14:17:35,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:17:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:17:35,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:17:35,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:17:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:17:35,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:17:35,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:17:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:17:35,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:17:35,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 14:17:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 14:17:35,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 14:17:35,903 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:17:35,949 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:17:35,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:17:36,079 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:17:36,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:17:36,085 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:17:36,087 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:17:36 BoogieIcfgContainer [2022-01-18 14:17:36,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:17:36,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:17:36,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:17:36,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:17:36,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:35" (1/2) ... [2022-01-18 14:17:36,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab3adce and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:17:36, skipping insertion in model container [2022-01-18 14:17:36,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:17:36" (2/2) ... [2022-01-18 14:17:36,108 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2022-01-18 14:17:36,112 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:17:36,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:17:36,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:17:36,112 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:17:36,175 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 14:17:36,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:17:36,248 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 14:17:36,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 14:17:36,258 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2022-01-18 14:17:36,322 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:17:36,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:36,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:36,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1477602056, now seen corresponding path program 1 times [2022-01-18 14:17:36,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:36,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744500796] [2022-01-18 14:17:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:36,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744500796] [2022-01-18 14:17:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744500796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:36,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:36,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:17:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899021800] [2022-01-18 14:17:36,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:36,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:17:36,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:17:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:17:36,636 INFO L87 Difference]: Start difference. First operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:36,822 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2022-01-18 14:17:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:17:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:17:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:36,858 INFO L225 Difference]: With dead ends: 606 [2022-01-18 14:17:36,858 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 14:17:36,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:36,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:36,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 14:17:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2022-01-18 14:17:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2022-01-18 14:17:36,952 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2022-01-18 14:17:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:36,953 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2022-01-18 14:17:36,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2022-01-18 14:17:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:17:36,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:36,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:36,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:17:36,966 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash 314777040, now seen corresponding path program 1 times [2022-01-18 14:17:36,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:36,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19374316] [2022-01-18 14:17:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:36,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:37,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19374316] [2022-01-18 14:17:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19374316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947830174] [2022-01-18 14:17:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:37,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:37,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:17:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:17:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:37,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:37,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 14:17:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:37,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947830174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:37,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:37,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 14:17:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916355764] [2022-01-18 14:17:37,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:37,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:37,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:37,474 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:37,671 INFO L93 Difference]: Finished difference Result 1387 states and 4491 transitions. [2022-01-18 14:17:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-01-18 14:17:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:37,680 INFO L225 Difference]: With dead ends: 1387 [2022-01-18 14:17:37,681 INFO L226 Difference]: Without dead ends: 1130 [2022-01-18 14:17:37,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:37,685 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:37,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 137 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-18 14:17:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 440. [2022-01-18 14:17:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2022-01-18 14:17:37,737 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2022-01-18 14:17:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:37,737 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2022-01-18 14:17:37,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2022-01-18 14:17:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:17:37,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:37,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:37,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:37,959 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 [2022-01-18 14:17:37,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 777242579, now seen corresponding path program 1 times [2022-01-18 14:17:37,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:37,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528256875] [2022-01-18 14:17:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:37,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:38,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528256875] [2022-01-18 14:17:38,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528256875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624187960] [2022-01-18 14:17:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:38,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:38,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:38,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:38,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:17:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:38,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:38,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:17:38,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:38,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 14:17:38,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:38,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 14:17:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624187960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:38,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-01-18 14:17:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374066438] [2022-01-18 14:17:38,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:38,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:17:38,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:17:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:38,705 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:39,051 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2022-01-18 14:17:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:17:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 14:17:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:39,061 INFO L225 Difference]: With dead ends: 1656 [2022-01-18 14:17:39,062 INFO L226 Difference]: Without dead ends: 1415 [2022-01-18 14:17:39,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:17:39,065 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:39,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 84 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-18 14:17:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2022-01-18 14:17:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2022-01-18 14:17:39,098 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2022-01-18 14:17:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:39,098 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2022-01-18 14:17:39,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2022-01-18 14:17:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:17:39,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:39,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:39,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 14:17:39,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash 384589864, now seen corresponding path program 1 times [2022-01-18 14:17:39,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885821767] [2022-01-18 14:17:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:39,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885821767] [2022-01-18 14:17:39,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885821767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:39,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:39,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:39,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664806258] [2022-01-18 14:17:39,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:39,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:39,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:39,379 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-18 14:17:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:39,474 INFO L93 Difference]: Finished difference Result 1165 states and 3991 transitions. [2022-01-18 14:17:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2022-01-18 14:17:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:39,481 INFO L225 Difference]: With dead ends: 1165 [2022-01-18 14:17:39,481 INFO L226 Difference]: Without dead ends: 922 [2022-01-18 14:17:39,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:39,482 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:39,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 63 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-18 14:17:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 692. [2022-01-18 14:17:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.4905933429811866) internal successors, (2412), 691 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2412 transitions. [2022-01-18 14:17:39,506 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2412 transitions. Word has length 18 [2022-01-18 14:17:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2412 transitions. [2022-01-18 14:17:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-18 14:17:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2412 transitions. [2022-01-18 14:17:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:17:39,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:39,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:39,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:17:39,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash -670667898, now seen corresponding path program 2 times [2022-01-18 14:17:39,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976434000] [2022-01-18 14:17:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:39,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976434000] [2022-01-18 14:17:39,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976434000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:39,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:39,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:39,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410166008] [2022-01-18 14:17:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:39,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:39,568 INFO L87 Difference]: Start difference. First operand 692 states and 2412 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-18 14:17:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:39,680 INFO L93 Difference]: Finished difference Result 1341 states and 4473 transitions. [2022-01-18 14:17:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:39,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2022-01-18 14:17:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:39,688 INFO L225 Difference]: With dead ends: 1341 [2022-01-18 14:17:39,688 INFO L226 Difference]: Without dead ends: 1080 [2022-01-18 14:17:39,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:39,689 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:39,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 68 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-18 14:17:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 710. [2022-01-18 14:17:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.459802538787024) internal successors, (2453), 709 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2453 transitions. [2022-01-18 14:17:39,715 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2453 transitions. Word has length 18 [2022-01-18 14:17:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:39,716 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2453 transitions. [2022-01-18 14:17:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-18 14:17:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2453 transitions. [2022-01-18 14:17:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 14:17:39,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:39,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:39,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:17:39,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:39,719 INFO L85 PathProgramCache]: Analyzing trace with hash 141777002, now seen corresponding path program 2 times [2022-01-18 14:17:39,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676064025] [2022-01-18 14:17:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:39,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676064025] [2022-01-18 14:17:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676064025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533516476] [2022-01-18 14:17:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:39,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:39,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:39,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:17:39,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:39,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:17:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:39,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:17:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533516476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:40,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:40,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-01-18 14:17:40,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314181609] [2022-01-18 14:17:40,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:40,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:17:40,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:17:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:40,122 INFO L87 Difference]: Start difference. First operand 710 states and 2453 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:40,543 INFO L93 Difference]: Finished difference Result 2749 states and 9004 transitions. [2022-01-18 14:17:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:17:40,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 14:17:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:40,556 INFO L225 Difference]: With dead ends: 2749 [2022-01-18 14:17:40,556 INFO L226 Difference]: Without dead ends: 2192 [2022-01-18 14:17:40,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:17:40,558 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 380 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:40,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 281 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-01-18 14:17:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1040. [2022-01-18 14:17:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.623676612127045) internal successors, (3765), 1039 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3765 transitions. [2022-01-18 14:17:40,605 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3765 transitions. Word has length 18 [2022-01-18 14:17:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:40,605 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 3765 transitions. [2022-01-18 14:17:40,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3765 transitions. [2022-01-18 14:17:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:40,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:40,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:40,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 14:17:40,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:40,823 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:40,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1785499653, now seen corresponding path program 1 times [2022-01-18 14:17:40,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009539265] [2022-01-18 14:17:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:40,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:40,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009539265] [2022-01-18 14:17:40,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009539265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815022051] [2022-01-18 14:17:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:40,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:40,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:40,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:17:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:17:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:41,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:17:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:41,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:41,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:41,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:17:41,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:41,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:41,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:41,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815022051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:41,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:41,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-01-18 14:17:41,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086415132] [2022-01-18 14:17:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:41,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:41,322 INFO L87 Difference]: Start difference. First operand 1040 states and 3765 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:41,738 INFO L93 Difference]: Finished difference Result 3114 states and 10907 transitions. [2022-01-18 14:17:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:41,762 INFO L225 Difference]: With dead ends: 3114 [2022-01-18 14:17:41,762 INFO L226 Difference]: Without dead ends: 2931 [2022-01-18 14:17:41,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:17:41,763 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 226 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:41,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 258 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-01-18 14:17:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 1769. [2022-01-18 14:17:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 3.690610859728507) internal successors, (6525), 1768 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 6525 transitions. [2022-01-18 14:17:41,843 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 6525 transitions. Word has length 21 [2022-01-18 14:17:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 6525 transitions. [2022-01-18 14:17:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 6525 transitions. [2022-01-18 14:17:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:41,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:41,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:41,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:42,067 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash 145242945, now seen corresponding path program 1 times [2022-01-18 14:17:42,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:42,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264480164] [2022-01-18 14:17:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:42,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264480164] [2022-01-18 14:17:42,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264480164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860075458] [2022-01-18 14:17:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:42,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:42,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:42,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:17:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:42,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:42,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:17:42,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:42,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:17:42,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:42,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 14:17:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860075458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:42,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:42,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-01-18 14:17:42,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267211746] [2022-01-18 14:17:42,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:42,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:42,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:42,726 INFO L87 Difference]: Start difference. First operand 1769 states and 6525 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:43,756 INFO L93 Difference]: Finished difference Result 5233 states and 17883 transitions. [2022-01-18 14:17:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:17:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:43,797 INFO L225 Difference]: With dead ends: 5233 [2022-01-18 14:17:43,798 INFO L226 Difference]: Without dead ends: 4899 [2022-01-18 14:17:43,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:17:43,799 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 692 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:43,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 220 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:17:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-01-18 14:17:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 2499. [2022-01-18 14:17:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 3.6937550040032026) internal successors, (9227), 2498 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 9227 transitions. [2022-01-18 14:17:43,907 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 9227 transitions. Word has length 21 [2022-01-18 14:17:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:43,908 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 9227 transitions. [2022-01-18 14:17:43,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 9227 transitions. [2022-01-18 14:17:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:43,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:43,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:43,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:44,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,132 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2088581083, now seen corresponding path program 2 times [2022-01-18 14:17:44,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:44,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976874688] [2022-01-18 14:17:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:44,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:44,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976874688] [2022-01-18 14:17:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976874688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536118472] [2022-01-18 14:17:44,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:44,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:44,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:44,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:17:44,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:44,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 14:17:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536118472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:44,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 14:17:44,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-18 14:17:44,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692332985] [2022-01-18 14:17:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:44,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:44,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:44,350 INFO L87 Difference]: Start difference. First operand 2499 states and 9227 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:44,497 INFO L93 Difference]: Finished difference Result 4412 states and 15908 transitions. [2022-01-18 14:17:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:17:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:44,515 INFO L225 Difference]: With dead ends: 4412 [2022-01-18 14:17:44,518 INFO L226 Difference]: Without dead ends: 4406 [2022-01-18 14:17:44,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:44,521 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:44,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-01-18 14:17:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 2607. [2022-01-18 14:17:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 3.7003069838833462) internal successors, (9643), 2606 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 9643 transitions. [2022-01-18 14:17:44,631 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 9643 transitions. Word has length 21 [2022-01-18 14:17:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:44,631 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 9643 transitions. [2022-01-18 14:17:44,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 9643 transitions. [2022-01-18 14:17:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:44,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:44,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:44,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:44,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,861 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1175176701, now seen corresponding path program 3 times [2022-01-18 14:17:44,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:44,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514630732] [2022-01-18 14:17:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:44,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:44,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514630732] [2022-01-18 14:17:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514630732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080304768] [2022-01-18 14:17:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:44,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:44,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:44,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:17:44,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:17:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:17:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:45,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080304768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:45,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:45,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 13 [2022-01-18 14:17:45,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931248166] [2022-01-18 14:17:45,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:45,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:45,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:45,297 INFO L87 Difference]: Start difference. First operand 2607 states and 9643 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:46,532 INFO L93 Difference]: Finished difference Result 8841 states and 29658 transitions. [2022-01-18 14:17:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:17:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:46,564 INFO L225 Difference]: With dead ends: 8841 [2022-01-18 14:17:46,564 INFO L226 Difference]: Without dead ends: 8268 [2022-01-18 14:17:46,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:17:46,565 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 485 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:46,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 404 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:17:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8268 states. [2022-01-18 14:17:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8268 to 2045. [2022-01-18 14:17:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.6183953033268104) internal successors, (7396), 2044 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7396 transitions. [2022-01-18 14:17:46,719 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7396 transitions. Word has length 21 [2022-01-18 14:17:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:46,720 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7396 transitions. [2022-01-18 14:17:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7396 transitions. [2022-01-18 14:17:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:46,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:46,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:46,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 14:17:46,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:46,942 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2130983577, now seen corresponding path program 2 times [2022-01-18 14:17:46,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:46,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587615546] [2022-01-18 14:17:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:46,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:46,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:46,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587615546] [2022-01-18 14:17:46,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587615546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:46,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:46,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:46,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946381432] [2022-01-18 14:17:46,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:46,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:46,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:46,994 INFO L87 Difference]: Start difference. First operand 2045 states and 7396 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:47,081 INFO L93 Difference]: Finished difference Result 2479 states and 8813 transitions. [2022-01-18 14:17:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:47,090 INFO L225 Difference]: With dead ends: 2479 [2022-01-18 14:17:47,090 INFO L226 Difference]: Without dead ends: 2455 [2022-01-18 14:17:47,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:47,091 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:47,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-01-18 14:17:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2041. [2022-01-18 14:17:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.618137254901961) internal successors, (7381), 2040 states have internal predecessors, (7381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7381 transitions. [2022-01-18 14:17:47,159 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7381 transitions. Word has length 21 [2022-01-18 14:17:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:47,159 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7381 transitions. [2022-01-18 14:17:47,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7381 transitions. [2022-01-18 14:17:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:47,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:47,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:47,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 14:17:47,168 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 998835253, now seen corresponding path program 3 times [2022-01-18 14:17:47,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:47,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913976038] [2022-01-18 14:17:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:47,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:47,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913976038] [2022-01-18 14:17:47,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913976038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:47,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:47,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:47,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517018708] [2022-01-18 14:17:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:47,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:47,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:47,242 INFO L87 Difference]: Start difference. First operand 2041 states and 7381 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:47,339 INFO L93 Difference]: Finished difference Result 2469 states and 8793 transitions. [2022-01-18 14:17:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:47,349 INFO L225 Difference]: With dead ends: 2469 [2022-01-18 14:17:47,349 INFO L226 Difference]: Without dead ends: 2463 [2022-01-18 14:17:47,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:47,350 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:47,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-01-18 14:17:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2067. [2022-01-18 14:17:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.6108422071636013) internal successors, (7460), 2066 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7460 transitions. [2022-01-18 14:17:47,404 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7460 transitions. Word has length 21 [2022-01-18 14:17:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:47,405 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 7460 transitions. [2022-01-18 14:17:47,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7460 transitions. [2022-01-18 14:17:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:17:47,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:47,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:47,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 14:17:47,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash 239897023, now seen corresponding path program 4 times [2022-01-18 14:17:47,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:47,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468494377] [2022-01-18 14:17:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:47,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:47,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468494377] [2022-01-18 14:17:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468494377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:47,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:47,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:47,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066473163] [2022-01-18 14:17:47,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:47,459 INFO L87 Difference]: Start difference. First operand 2067 states and 7460 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:47,556 INFO L93 Difference]: Finished difference Result 2427 states and 8660 transitions. [2022-01-18 14:17:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:17:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:47,564 INFO L225 Difference]: With dead ends: 2427 [2022-01-18 14:17:47,564 INFO L226 Difference]: Without dead ends: 2401 [2022-01-18 14:17:47,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:47,565 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:47,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-01-18 14:17:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2041. [2022-01-18 14:17:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.6176470588235294) internal successors, (7380), 2040 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7380 transitions. [2022-01-18 14:17:47,624 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7380 transitions. Word has length 21 [2022-01-18 14:17:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:47,624 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7380 transitions. [2022-01-18 14:17:47,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7380 transitions. [2022-01-18 14:17:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:47,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:47,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 14:17:47,632 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1796214363, now seen corresponding path program 1 times [2022-01-18 14:17:47,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762562482] [2022-01-18 14:17:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:47,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762562482] [2022-01-18 14:17:47,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762562482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148440856] [2022-01-18 14:17:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:47,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:47,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:17:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:48,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:17:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:48,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148440856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:48,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:48,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 14:17:48,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620887115] [2022-01-18 14:17:48,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:48,244 INFO L87 Difference]: Start difference. First operand 2041 states and 7380 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:48,793 INFO L93 Difference]: Finished difference Result 4176 states and 14263 transitions. [2022-01-18 14:17:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:17:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:48,804 INFO L225 Difference]: With dead ends: 4176 [2022-01-18 14:17:48,804 INFO L226 Difference]: Without dead ends: 3709 [2022-01-18 14:17:48,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:17:48,805 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 357 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:48,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 495 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2022-01-18 14:17:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 2366. [2022-01-18 14:17:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.691754756871036) internal successors, (8731), 2365 states have internal predecessors, (8731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8731 transitions. [2022-01-18 14:17:48,889 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8731 transitions. Word has length 24 [2022-01-18 14:17:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 8731 transitions. [2022-01-18 14:17:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8731 transitions. [2022-01-18 14:17:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:48,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:48,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:49,119 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,SelfDestructingSolverStorable13 [2022-01-18 14:17:49,119 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash 64795745, now seen corresponding path program 2 times [2022-01-18 14:17:49,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357806558] [2022-01-18 14:17:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:49,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357806558] [2022-01-18 14:17:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357806558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061340704] [2022-01-18 14:17:49,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:49,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:49,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:49,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:17:49,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:49,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:17:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061340704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:49,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:49,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 14:17:49,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706804782] [2022-01-18 14:17:49,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:49,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:49,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:49,657 INFO L87 Difference]: Start difference. First operand 2366 states and 8731 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:50,261 INFO L93 Difference]: Finished difference Result 6103 states and 21705 transitions. [2022-01-18 14:17:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:17:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:50,275 INFO L225 Difference]: With dead ends: 6103 [2022-01-18 14:17:50,275 INFO L226 Difference]: Without dead ends: 5434 [2022-01-18 14:17:50,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:17:50,276 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 494 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:50,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 471 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2022-01-18 14:17:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3427. [2022-01-18 14:17:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 3.7802101576182134) internal successors, (12951), 3426 states have internal predecessors, (12951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 12951 transitions. [2022-01-18 14:17:50,389 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 12951 transitions. Word has length 24 [2022-01-18 14:17:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:50,389 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 12951 transitions. [2022-01-18 14:17:50,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 12951 transitions. [2022-01-18 14:17:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:50,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:50,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:50,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:50,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 14:17:50,611 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1659948581, now seen corresponding path program 1 times [2022-01-18 14:17:50,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256659399] [2022-01-18 14:17:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:50,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256659399] [2022-01-18 14:17:50,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256659399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317186075] [2022-01-18 14:17:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:50,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:50,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:50,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:17:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:50,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:17:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:50,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:50,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:50,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 14:17:50,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:50,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:17:50,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:50,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:50,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317186075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:50,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:50,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-18 14:17:50,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847070989] [2022-01-18 14:17:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:50,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:50,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:50,972 INFO L87 Difference]: Start difference. First operand 3427 states and 12951 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:51,286 INFO L93 Difference]: Finished difference Result 6252 states and 22222 transitions. [2022-01-18 14:17:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:51,298 INFO L225 Difference]: With dead ends: 6252 [2022-01-18 14:17:51,299 INFO L226 Difference]: Without dead ends: 5110 [2022-01-18 14:17:51,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:51,299 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:51,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 209 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2022-01-18 14:17:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 2783. [2022-01-18 14:17:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.6746944644140904) internal successors, (10223), 2782 states have internal predecessors, (10223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10223 transitions. [2022-01-18 14:17:51,400 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10223 transitions. Word has length 24 [2022-01-18 14:17:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:51,400 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 10223 transitions. [2022-01-18 14:17:51,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10223 transitions. [2022-01-18 14:17:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:51,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:51,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:51,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:51,620 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,SelfDestructingSolverStorable15 [2022-01-18 14:17:51,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash 364222817, now seen corresponding path program 2 times [2022-01-18 14:17:51,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:51,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858347443] [2022-01-18 14:17:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:51,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:51,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858347443] [2022-01-18 14:17:51,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858347443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667548631] [2022-01-18 14:17:51,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:51,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:51,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:51,692 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:51,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 14:17:51,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:51,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:51,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:51,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:17:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:51,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:51,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:51,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 14:17:51,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:51,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:51,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:51,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:51,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667548631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:51,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:51,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-18 14:17:51,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128454963] [2022-01-18 14:17:51,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:51,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:51,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:51,953 INFO L87 Difference]: Start difference. First operand 2783 states and 10223 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-18 14:17:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:52,257 INFO L93 Difference]: Finished difference Result 6449 states and 22980 transitions. [2022-01-18 14:17:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 24 [2022-01-18 14:17:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:52,272 INFO L225 Difference]: With dead ends: 6449 [2022-01-18 14:17:52,272 INFO L226 Difference]: Without dead ends: 6404 [2022-01-18 14:17:52,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:52,273 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 178 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6404 states. [2022-01-18 14:17:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6404 to 3449. [2022-01-18 14:17:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 3.7375290023201857) internal successors, (12887), 3448 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 12887 transitions. [2022-01-18 14:17:52,385 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 12887 transitions. Word has length 24 [2022-01-18 14:17:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:52,385 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 12887 transitions. [2022-01-18 14:17:52,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-18 14:17:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 12887 transitions. [2022-01-18 14:17:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:52,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:52,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:52,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:52,607 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,SelfDestructingSolverStorable16 [2022-01-18 14:17:52,607 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1300430463, now seen corresponding path program 1 times [2022-01-18 14:17:52,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376121151] [2022-01-18 14:17:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:52,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:52,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376121151] [2022-01-18 14:17:52,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376121151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903963259] [2022-01-18 14:17:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:52,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:52,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:52,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 14:17:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:53,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:53,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 14:17:53,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:53,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:17:53,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:53,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 14:17:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:53,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903963259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:53,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:53,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-18 14:17:53,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349496] [2022-01-18 14:17:53,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:53,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:17:53,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:17:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:53,630 INFO L87 Difference]: Start difference. First operand 3449 states and 12887 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:54,241 INFO L93 Difference]: Finished difference Result 5722 states and 20599 transitions. [2022-01-18 14:17:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:17:54,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:54,256 INFO L225 Difference]: With dead ends: 5722 [2022-01-18 14:17:54,256 INFO L226 Difference]: Without dead ends: 5018 [2022-01-18 14:17:54,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:17:54,257 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 278 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:54,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 248 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-01-18 14:17:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3923. [2022-01-18 14:17:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 3.752677205507394) internal successors, (14718), 3922 states have internal predecessors, (14718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 14718 transitions. [2022-01-18 14:17:54,363 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 14718 transitions. Word has length 24 [2022-01-18 14:17:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:54,363 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 14718 transitions. [2022-01-18 14:17:54,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 14718 transitions. [2022-01-18 14:17:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:54,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:54,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:54,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 14:17:54,599 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,SelfDestructingSolverStorable17 [2022-01-18 14:17:54,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -310047807, now seen corresponding path program 1 times [2022-01-18 14:17:54,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508119462] [2022-01-18 14:17:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:54,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:54,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:54,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508119462] [2022-01-18 14:17:54,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508119462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:54,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982372913] [2022-01-18 14:17:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:54,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:54,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:54,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:54,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 14:17:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:55,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:55,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:55,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:17:55,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:55,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:17:55,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:55,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:17:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:55,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982372913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:55,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:55,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 14:17:55,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450951167] [2022-01-18 14:17:55,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:55,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:55,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:55,357 INFO L87 Difference]: Start difference. First operand 3923 states and 14718 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:55,754 INFO L93 Difference]: Finished difference Result 5006 states and 17977 transitions. [2022-01-18 14:17:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:17:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:55,764 INFO L225 Difference]: With dead ends: 5006 [2022-01-18 14:17:55,764 INFO L226 Difference]: Without dead ends: 4270 [2022-01-18 14:17:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:17:55,765 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 324 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:55,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 153 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2022-01-18 14:17:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3699. [2022-01-18 14:17:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.7420227149810708) internal successors, (13838), 3698 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13838 transitions. [2022-01-18 14:17:55,847 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13838 transitions. Word has length 24 [2022-01-18 14:17:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:55,847 INFO L470 AbstractCegarLoop]: Abstraction has 3699 states and 13838 transitions. [2022-01-18 14:17:55,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13838 transitions. [2022-01-18 14:17:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:55,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:55,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:55,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:56,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,071 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1944744923, now seen corresponding path program 1 times [2022-01-18 14:17:56,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:56,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939074991] [2022-01-18 14:17:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:56,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939074991] [2022-01-18 14:17:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939074991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473507736] [2022-01-18 14:17:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,140 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:56,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 14:17:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:17:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:56,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:56,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:56,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:56,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:56,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:17:56,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:56,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:56,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473507736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:56,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:56,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 14:17:56,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069065258] [2022-01-18 14:17:56,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:56,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:56,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:56,338 INFO L87 Difference]: Start difference. First operand 3699 states and 13838 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:56,545 INFO L93 Difference]: Finished difference Result 4513 states and 16366 transitions. [2022-01-18 14:17:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:56,555 INFO L225 Difference]: With dead ends: 4513 [2022-01-18 14:17:56,555 INFO L226 Difference]: Without dead ends: 4326 [2022-01-18 14:17:56,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:56,556 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:56,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 162 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-01-18 14:17:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3572. [2022-01-18 14:17:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3571 states have (on average 3.7306076729207507) internal successors, (13322), 3571 states have internal predecessors, (13322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 13322 transitions. [2022-01-18 14:17:56,630 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 13322 transitions. Word has length 24 [2022-01-18 14:17:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:56,631 INFO L470 AbstractCegarLoop]: Abstraction has 3572 states and 13322 transitions. [2022-01-18 14:17:56,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 13322 transitions. [2022-01-18 14:17:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:56,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:56,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:56,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,856 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2018102235, now seen corresponding path program 3 times [2022-01-18 14:17:56,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:56,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210110273] [2022-01-18 14:17:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:56,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210110273] [2022-01-18 14:17:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210110273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131859074] [2022-01-18 14:17:56,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:56,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,917 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:56,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 14:17:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:17:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:17:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:57,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:57,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 24 [2022-01-18 14:17:57,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131859074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:57,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:57,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 14:17:57,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030765538] [2022-01-18 14:17:57,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:57,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:57,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:57,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:57,129 INFO L87 Difference]: Start difference. First operand 3572 states and 13322 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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) [2022-01-18 14:17:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:57,312 INFO L93 Difference]: Finished difference Result 4056 states and 14546 transitions. [2022-01-18 14:17:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 24 [2022-01-18 14:17:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:57,319 INFO L225 Difference]: With dead ends: 4056 [2022-01-18 14:17:57,319 INFO L226 Difference]: Without dead ends: 3564 [2022-01-18 14:17:57,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:57,319 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:57,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 128 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-01-18 14:17:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3118. [2022-01-18 14:17:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.7388514597369267) internal successors, (11654), 3117 states have internal predecessors, (11654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11654 transitions. [2022-01-18 14:17:57,386 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11654 transitions. Word has length 24 [2022-01-18 14:17:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:57,386 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 11654 transitions. [2022-01-18 14:17:57,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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) [2022-01-18 14:17:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11654 transitions. [2022-01-18 14:17:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:57,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:57,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:57,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:57,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:57,594 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash -451668925, now seen corresponding path program 4 times [2022-01-18 14:17:57,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:57,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165646067] [2022-01-18 14:17:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:57,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165646067] [2022-01-18 14:17:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165646067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609154121] [2022-01-18 14:17:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:57,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:57,648 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:57,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 14:17:57,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:57,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:17:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:57,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:57,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:57,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:57,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609154121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:57,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:57,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 14:17:57,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414232945] [2022-01-18 14:17:57,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:57,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:57,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:57,853 INFO L87 Difference]: Start difference. First operand 3118 states and 11654 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:58,047 INFO L93 Difference]: Finished difference Result 3582 states and 13262 transitions. [2022-01-18 14:17:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:58,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:58,054 INFO L225 Difference]: With dead ends: 3582 [2022-01-18 14:17:58,055 INFO L226 Difference]: Without dead ends: 3582 [2022-01-18 14:17:58,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:58,055 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 139 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:58,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 120 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-01-18 14:17:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3326. [2022-01-18 14:17:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 3.732330827067669) internal successors, (12410), 3325 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 12410 transitions. [2022-01-18 14:17:58,109 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 12410 transitions. Word has length 24 [2022-01-18 14:17:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:58,110 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 12410 transitions. [2022-01-18 14:17:58,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 12410 transitions. [2022-01-18 14:17:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:58,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:58,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:58,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:58,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 14:17:58,316 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1138655409, now seen corresponding path program 5 times [2022-01-18 14:17:58,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:58,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414250757] [2022-01-18 14:17:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:58,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:58,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:58,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414250757] [2022-01-18 14:17:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414250757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:58,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319179364] [2022-01-18 14:17:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:58,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:58,375 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:58,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 14:17:58,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:17:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:58,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:58,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:17:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:58,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:58,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:58,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:58,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:58,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:58,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:58,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319179364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:58,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:58,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 14:17:58,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039970501] [2022-01-18 14:17:58,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:58,602 INFO L87 Difference]: Start difference. First operand 3326 states and 12410 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:58,819 INFO L93 Difference]: Finished difference Result 5484 states and 19412 transitions. [2022-01-18 14:17:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:17:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:58,829 INFO L225 Difference]: With dead ends: 5484 [2022-01-18 14:17:58,829 INFO L226 Difference]: Without dead ends: 5044 [2022-01-18 14:17:58,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:58,830 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:58,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 137 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-01-18 14:17:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2987. [2022-01-18 14:17:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 3.672136637642331) internal successors, (10965), 2986 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 10965 transitions. [2022-01-18 14:17:58,885 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 10965 transitions. Word has length 24 [2022-01-18 14:17:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 10965 transitions. [2022-01-18 14:17:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 10965 transitions. [2022-01-18 14:17:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:58,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:58,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:58,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:59,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1763827543, now seen corresponding path program 6 times [2022-01-18 14:17:59,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:59,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193688590] [2022-01-18 14:17:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:59,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193688590] [2022-01-18 14:17:59,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193688590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381732044] [2022-01-18 14:17:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:59,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:59,141 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:59,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 14:17:59,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:17:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:59,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:17:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:59,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:59,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:17:59,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:59,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:59,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:17:59,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:17:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381732044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:59,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:59,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 14:17:59,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129545014] [2022-01-18 14:17:59,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:59,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:59,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:59,373 INFO L87 Difference]: Start difference. First operand 2987 states and 10965 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:59,546 INFO L93 Difference]: Finished difference Result 3479 states and 12527 transitions. [2022-01-18 14:17:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 24 [2022-01-18 14:17:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:59,553 INFO L225 Difference]: With dead ends: 3479 [2022-01-18 14:17:59,553 INFO L226 Difference]: Without dead ends: 3479 [2022-01-18 14:17:59,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:59,553 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:59,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-01-18 14:17:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2946. [2022-01-18 14:17:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.6512733446519525) internal successors, (10753), 2945 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10753 transitions. [2022-01-18 14:17:59,596 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10753 transitions. Word has length 24 [2022-01-18 14:17:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10753 transitions. [2022-01-18 14:17:59,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10753 transitions. [2022-01-18 14:17:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:17:59,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:59,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:59,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:59,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,802 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:17:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1785525385, now seen corresponding path program 2 times [2022-01-18 14:17:59,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129865847] [2022-01-18 14:17:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:59,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:59,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129865847] [2022-01-18 14:17:59,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129865847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:59,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261218612] [2022-01-18 14:17:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:59,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:59,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:59,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 14:17:59,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:00,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:00,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-01-18 14:18:00,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:00,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-01-18 14:18:00,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:00,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 14:18:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:00,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261218612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:00,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:00,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-18 14:18:00,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678726040] [2022-01-18 14:18:00,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:00,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:00,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:00,668 INFO L87 Difference]: Start difference. First operand 2946 states and 10753 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:01,221 INFO L93 Difference]: Finished difference Result 4316 states and 15141 transitions. [2022-01-18 14:18:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:18:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:18:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:01,228 INFO L225 Difference]: With dead ends: 4316 [2022-01-18 14:18:01,229 INFO L226 Difference]: Without dead ends: 3494 [2022-01-18 14:18:01,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:18:01,229 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 280 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:01,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 187 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2022-01-18 14:18:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 2770. [2022-01-18 14:18:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 3.6796677500902852) internal successors, (10189), 2769 states have internal predecessors, (10189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 10189 transitions. [2022-01-18 14:18:01,271 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 10189 transitions. Word has length 24 [2022-01-18 14:18:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 2770 states and 10189 transitions. [2022-01-18 14:18:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 10189 transitions. [2022-01-18 14:18:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:01,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:01,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:01,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:01,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:01,489 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2054099859, now seen corresponding path program 3 times [2022-01-18 14:18:01,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833049161] [2022-01-18 14:18:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:01,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:01,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833049161] [2022-01-18 14:18:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833049161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045285926] [2022-01-18 14:18:01,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:01,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:01,545 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:01,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 14:18:01,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:01,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:18:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:01,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:01,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:18:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:02,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045285926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:02,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:02,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2022-01-18 14:18:02,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059346760] [2022-01-18 14:18:02,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:02,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:18:02,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:18:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:18:02,272 INFO L87 Difference]: Start difference. First operand 2770 states and 10189 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:06,752 INFO L93 Difference]: Finished difference Result 15344 states and 53305 transitions. [2022-01-18 14:18:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 14:18:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 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 27 [2022-01-18 14:18:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:06,780 INFO L225 Difference]: With dead ends: 15344 [2022-01-18 14:18:06,780 INFO L226 Difference]: Without dead ends: 11515 [2022-01-18 14:18:06,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4963 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2342, Invalid=12664, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 14:18:06,784 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1073 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 4659 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:06,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 1518 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4659 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 14:18:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2022-01-18 14:18:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 5300. [2022-01-18 14:18:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 3.811851292696735) internal successors, (20199), 5299 states have internal predecessors, (20199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 20199 transitions. [2022-01-18 14:18:06,966 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 20199 transitions. Word has length 27 [2022-01-18 14:18:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:06,966 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 20199 transitions. [2022-01-18 14:18:06,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 20199 transitions. [2022-01-18 14:18:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:06,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:06,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:06,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:07,177 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,SelfDestructingSolverStorable25 [2022-01-18 14:18:07,177 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash -719511607, now seen corresponding path program 1 times [2022-01-18 14:18:07,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:07,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712539396] [2022-01-18 14:18:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:07,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:07,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712539396] [2022-01-18 14:18:07,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712539396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988213223] [2022-01-18 14:18:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:07,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:07,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:07,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 14:18:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:18:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:07,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:18:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:07,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:07,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:07,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:18:07,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:07,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:18:07,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:07,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:18:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988213223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:07,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:07,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 14:18:07,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678811129] [2022-01-18 14:18:07,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:07,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:07,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:07,454 INFO L87 Difference]: Start difference. First operand 5300 states and 20199 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:07,654 INFO L93 Difference]: Finished difference Result 7207 states and 26780 transitions. [2022-01-18 14:18:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:18:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:07,674 INFO L225 Difference]: With dead ends: 7207 [2022-01-18 14:18:07,674 INFO L226 Difference]: Without dead ends: 6969 [2022-01-18 14:18:07,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:07,675 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 162 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:07,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6969 states. [2022-01-18 14:18:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6969 to 6099. [2022-01-18 14:18:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.791571006887504) internal successors, (23121), 6098 states have internal predecessors, (23121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 23121 transitions. [2022-01-18 14:18:07,814 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 23121 transitions. Word has length 27 [2022-01-18 14:18:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:07,815 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 23121 transitions. [2022-01-18 14:18:07,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 23121 transitions. [2022-01-18 14:18:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:07,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:07,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:07,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:08,043 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,SelfDestructingSolverStorable26 [2022-01-18 14:18:08,043 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash 874695761, now seen corresponding path program 4 times [2022-01-18 14:18:08,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351360418] [2022-01-18 14:18:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:08,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:08,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351360418] [2022-01-18 14:18:08,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351360418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025240968] [2022-01-18 14:18:08,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:08,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:08,099 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:08,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 14:18:08,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:08,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:08,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:18:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:08,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025240968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:08,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:08,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-01-18 14:18:08,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783610806] [2022-01-18 14:18:08,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:08,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:08,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:08,354 INFO L87 Difference]: Start difference. First operand 6099 states and 23121 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:08,614 INFO L93 Difference]: Finished difference Result 12007 states and 44247 transitions. [2022-01-18 14:18:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:08,644 INFO L225 Difference]: With dead ends: 12007 [2022-01-18 14:18:08,644 INFO L226 Difference]: Without dead ends: 11371 [2022-01-18 14:18:08,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:08,645 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 239 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:08,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 268 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11371 states. [2022-01-18 14:18:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11371 to 6822. [2022-01-18 14:18:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 3.8425450813663686) internal successors, (26210), 6821 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 26210 transitions. [2022-01-18 14:18:08,832 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 26210 transitions. Word has length 27 [2022-01-18 14:18:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:08,832 INFO L470 AbstractCegarLoop]: Abstraction has 6822 states and 26210 transitions. [2022-01-18 14:18:08,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 26210 transitions. [2022-01-18 14:18:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:08,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:08,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:08,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 14:18:09,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 14:18:09,046 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1192875703, now seen corresponding path program 5 times [2022-01-18 14:18:09,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:09,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137565987] [2022-01-18 14:18:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:09,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137565987] [2022-01-18 14:18:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137565987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692286317] [2022-01-18 14:18:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:09,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:09,093 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:09,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 14:18:09,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:18:09,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:09,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:18:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692286317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:09,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:09,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2022-01-18 14:18:09,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483091939] [2022-01-18 14:18:09,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:09,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:18:09,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:18:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:09,344 INFO L87 Difference]: Start difference. First operand 6822 states and 26210 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:09,581 INFO L93 Difference]: Finished difference Result 10691 states and 39400 transitions. [2022-01-18 14:18:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:18:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:09,604 INFO L225 Difference]: With dead ends: 10691 [2022-01-18 14:18:09,604 INFO L226 Difference]: Without dead ends: 9957 [2022-01-18 14:18:09,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:18:09,605 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 182 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:09,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 286 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-01-18 14:18:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 6855. [2022-01-18 14:18:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 6854 states have (on average 3.824044353662095) internal successors, (26210), 6854 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 26210 transitions. [2022-01-18 14:18:09,804 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 26210 transitions. Word has length 27 [2022-01-18 14:18:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:09,804 INFO L470 AbstractCegarLoop]: Abstraction has 6855 states and 26210 transitions. [2022-01-18 14:18:09,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 26210 transitions. [2022-01-18 14:18:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:09,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:09,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:09,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 14:18:10,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:10,017 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash -144799379, now seen corresponding path program 6 times [2022-01-18 14:18:10,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:10,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485237503] [2022-01-18 14:18:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:10,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:10,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485237503] [2022-01-18 14:18:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485237503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326404433] [2022-01-18 14:18:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:10,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:10,081 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:10,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 14:18:10,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 14:18:10,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:10,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 14:18:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:10,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326404433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:10,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-18 14:18:10,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741901858] [2022-01-18 14:18:10,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:10,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:10,321 INFO L87 Difference]: Start difference. First operand 6855 states and 26210 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-18 14:18:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:10,483 INFO L93 Difference]: Finished difference Result 11732 states and 43817 transitions. [2022-01-18 14:18:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:18:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 27 [2022-01-18 14:18:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:10,509 INFO L225 Difference]: With dead ends: 11732 [2022-01-18 14:18:10,510 INFO L226 Difference]: Without dead ends: 11351 [2022-01-18 14:18:10,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:10,510 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 246 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:10,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 145 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11351 states. [2022-01-18 14:18:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11351 to 8024. [2022-01-18 14:18:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8024 states, 8023 states have (on average 3.9000373924965723) internal successors, (31290), 8023 states have internal predecessors, (31290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 31290 transitions. [2022-01-18 14:18:10,667 INFO L78 Accepts]: Start accepts. Automaton has 8024 states and 31290 transitions. Word has length 27 [2022-01-18 14:18:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:10,667 INFO L470 AbstractCegarLoop]: Abstraction has 8024 states and 31290 transitions. [2022-01-18 14:18:10,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-18 14:18:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 8024 states and 31290 transitions. [2022-01-18 14:18:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:10,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:10,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:10,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 14:18:10,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:10,881 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash 173380563, now seen corresponding path program 7 times [2022-01-18 14:18:10,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:10,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984204307] [2022-01-18 14:18:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:10,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:10,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984204307] [2022-01-18 14:18:10,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984204307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662103435] [2022-01-18 14:18:10,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:10,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:10,945 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:10,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 14:18:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:10,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:10,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:11,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:11,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:18:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:11,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662103435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:11,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:11,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:18:11,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383231585] [2022-01-18 14:18:11,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:11,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:18:11,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:18:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:18:11,251 INFO L87 Difference]: Start difference. First operand 8024 states and 31290 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-18 14:18:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:11,393 INFO L93 Difference]: Finished difference Result 11702 states and 43501 transitions. [2022-01-18 14:18:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:18:11,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 27 [2022-01-18 14:18:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:11,419 INFO L225 Difference]: With dead ends: 11702 [2022-01-18 14:18:11,419 INFO L226 Difference]: Without dead ends: 11257 [2022-01-18 14:18:11,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:11,420 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:11,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 131 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-01-18 14:18:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8003. [2022-01-18 14:18:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 8002 states have (on average 3.8975256185953513) internal successors, (31188), 8002 states have internal predecessors, (31188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 31188 transitions. [2022-01-18 14:18:11,576 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 31188 transitions. Word has length 27 [2022-01-18 14:18:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:11,576 INFO L470 AbstractCegarLoop]: Abstraction has 8003 states and 31188 transitions. [2022-01-18 14:18:11,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-18 14:18:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 31188 transitions. [2022-01-18 14:18:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:11,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:11,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:11,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:11,790 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,SelfDestructingSolverStorable30 [2022-01-18 14:18:11,791 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash -586208403, now seen corresponding path program 8 times [2022-01-18 14:18:11,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167297292] [2022-01-18 14:18:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:11,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:11,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167297292] [2022-01-18 14:18:11,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167297292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377570264] [2022-01-18 14:18:11,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:11,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:11,853 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:11,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 14:18:11,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:12,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:18:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:12,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377570264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:12,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:12,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-01-18 14:18:12,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478364852] [2022-01-18 14:18:12,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:12,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:18:12,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:18:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:12,158 INFO L87 Difference]: Start difference. First operand 8003 states and 31188 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:12,382 INFO L93 Difference]: Finished difference Result 11237 states and 42020 transitions. [2022-01-18 14:18:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:12,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:12,411 INFO L225 Difference]: With dead ends: 11237 [2022-01-18 14:18:12,411 INFO L226 Difference]: Without dead ends: 10762 [2022-01-18 14:18:12,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:12,412 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:12,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 210 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2022-01-18 14:18:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 8335. [2022-01-18 14:18:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8335 states, 8334 states have (on average 3.866930645548356) internal successors, (32227), 8334 states have internal predecessors, (32227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8335 states to 8335 states and 32227 transitions. [2022-01-18 14:18:12,622 INFO L78 Accepts]: Start accepts. Automaton has 8335 states and 32227 transitions. Word has length 27 [2022-01-18 14:18:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:12,622 INFO L470 AbstractCegarLoop]: Abstraction has 8335 states and 32227 transitions. [2022-01-18 14:18:12,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8335 states and 32227 transitions. [2022-01-18 14:18:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:12,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:12,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:12,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:12,851 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,SelfDestructingSolverStorable31 [2022-01-18 14:18:12,851 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1500826025, now seen corresponding path program 1 times [2022-01-18 14:18:12,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101384688] [2022-01-18 14:18:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:12,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:12,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:12,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101384688] [2022-01-18 14:18:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101384688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:18:12,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:18:12,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:18:12,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413799932] [2022-01-18 14:18:12,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:18:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:18:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:18:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:18:12,863 INFO L87 Difference]: Start difference. First operand 8335 states and 32227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:12,916 INFO L93 Difference]: Finished difference Result 9672 states and 36473 transitions. [2022-01-18 14:18:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:18:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:12,938 INFO L225 Difference]: With dead ends: 9672 [2022-01-18 14:18:12,938 INFO L226 Difference]: Without dead ends: 9622 [2022-01-18 14:18:12,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:18:12,939 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2022-01-18 14:18:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 8176. [2022-01-18 14:18:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 8175 states have (on average 3.8801223241590215) internal successors, (31720), 8175 states have internal predecessors, (31720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 31720 transitions. [2022-01-18 14:18:13,104 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 31720 transitions. Word has length 27 [2022-01-18 14:18:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:13,104 INFO L470 AbstractCegarLoop]: Abstraction has 8176 states and 31720 transitions. [2022-01-18 14:18:13,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 31720 transitions. [2022-01-18 14:18:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:13,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:13,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:13,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-18 14:18:13,122 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1265490017, now seen corresponding path program 2 times [2022-01-18 14:18:13,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496129440] [2022-01-18 14:18:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:13,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:13,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496129440] [2022-01-18 14:18:13,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496129440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:13,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730448669] [2022-01-18 14:18:13,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:13,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:13,180 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:13,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 14:18:13,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:13,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:18:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:13,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:18:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:13,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:13,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:13,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:18:13,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:13,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:18:13,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:13,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:18:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730448669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:13,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 14:18:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197168687] [2022-01-18 14:18:13,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:13,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:13,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:13,460 INFO L87 Difference]: Start difference. First operand 8176 states and 31720 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:13,757 INFO L93 Difference]: Finished difference Result 9264 states and 34871 transitions. [2022-01-18 14:18:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:18:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:13,779 INFO L225 Difference]: With dead ends: 9264 [2022-01-18 14:18:13,780 INFO L226 Difference]: Without dead ends: 9087 [2022-01-18 14:18:13,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:13,780 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:13,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2022-01-18 14:18:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 8094. [2022-01-18 14:18:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8094 states, 8093 states have (on average 3.8840973680958855) internal successors, (31434), 8093 states have internal predecessors, (31434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8094 states to 8094 states and 31434 transitions. [2022-01-18 14:18:13,913 INFO L78 Accepts]: Start accepts. Automaton has 8094 states and 31434 transitions. Word has length 27 [2022-01-18 14:18:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:13,913 INFO L470 AbstractCegarLoop]: Abstraction has 8094 states and 31434 transitions. [2022-01-18 14:18:13,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8094 states and 31434 transitions. [2022-01-18 14:18:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:13,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:13,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:13,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 14:18:14,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:14,126 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash -19220799, now seen corresponding path program 3 times [2022-01-18 14:18:14,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:14,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902944002] [2022-01-18 14:18:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:14,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:14,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902944002] [2022-01-18 14:18:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902944002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359054011] [2022-01-18 14:18:14,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:14,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:14,192 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:14,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 14:18:14,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:18:14,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:14,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:18:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:14,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:14,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:14,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:18:14,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:14,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:18:14,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:14,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 24 [2022-01-18 14:18:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359054011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:14,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:14,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-01-18 14:18:14,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090226410] [2022-01-18 14:18:14,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:14,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:18:14,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:18:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:18:14,409 INFO L87 Difference]: Start difference. First operand 8094 states and 31434 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:14,639 INFO L93 Difference]: Finished difference Result 8720 states and 33494 transitions. [2022-01-18 14:18:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:18:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:14,660 INFO L225 Difference]: With dead ends: 8720 [2022-01-18 14:18:14,661 INFO L226 Difference]: Without dead ends: 8720 [2022-01-18 14:18:14,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:14,661 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:14,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 160 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2022-01-18 14:18:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 7844. [2022-01-18 14:18:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7844 states, 7843 states have (on average 3.8797653958944283) internal successors, (30429), 7843 states have internal predecessors, (30429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7844 states to 7844 states and 30429 transitions. [2022-01-18 14:18:14,792 INFO L78 Accepts]: Start accepts. Automaton has 7844 states and 30429 transitions. Word has length 27 [2022-01-18 14:18:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:14,792 INFO L470 AbstractCegarLoop]: Abstraction has 7844 states and 30429 transitions. [2022-01-18 14:18:14,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7844 states and 30429 transitions. [2022-01-18 14:18:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:14,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:14,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:14,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 14:18:15,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:15,006 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2068589027, now seen corresponding path program 4 times [2022-01-18 14:18:15,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:15,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049566159] [2022-01-18 14:18:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:15,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:15,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:15,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049566159] [2022-01-18 14:18:15,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049566159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:18:15,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:18:15,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:18:15,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246478275] [2022-01-18 14:18:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:18:15,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:18:15,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:18:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:18:15,085 INFO L87 Difference]: Start difference. First operand 7844 states and 30429 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:15,170 INFO L93 Difference]: Finished difference Result 7690 states and 29836 transitions. [2022-01-18 14:18:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:18:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:15,190 INFO L225 Difference]: With dead ends: 7690 [2022-01-18 14:18:15,190 INFO L226 Difference]: Without dead ends: 7690 [2022-01-18 14:18:15,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:18:15,190 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:15,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-01-18 14:18:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7690. [2022-01-18 14:18:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.8803485498764467) internal successors, (29836), 7689 states have internal predecessors, (29836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 29836 transitions. [2022-01-18 14:18:15,340 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 29836 transitions. Word has length 27 [2022-01-18 14:18:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:15,340 INFO L470 AbstractCegarLoop]: Abstraction has 7690 states and 29836 transitions. [2022-01-18 14:18:15,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 29836 transitions. [2022-01-18 14:18:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:18:15,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:15,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:15,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-18 14:18:15,353 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -740813211, now seen corresponding path program 5 times [2022-01-18 14:18:15,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:15,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128046606] [2022-01-18 14:18:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:15,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:15,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:15,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128046606] [2022-01-18 14:18:15,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128046606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:18:15,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:18:15,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 14:18:15,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028707779] [2022-01-18 14:18:15,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:18:15,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:18:15,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:18:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:18:15,408 INFO L87 Difference]: Start difference. First operand 7690 states and 29836 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:15,506 INFO L93 Difference]: Finished difference Result 7532 states and 29153 transitions. [2022-01-18 14:18:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:18:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:18:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:15,524 INFO L225 Difference]: With dead ends: 7532 [2022-01-18 14:18:15,524 INFO L226 Difference]: Without dead ends: 7360 [2022-01-18 14:18:15,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:15,525 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 52 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2022-01-18 14:18:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7360. [2022-01-18 14:18:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 3.900529963310232) internal successors, (28704), 7359 states have internal predecessors, (28704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 28704 transitions. [2022-01-18 14:18:15,640 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 28704 transitions. Word has length 27 [2022-01-18 14:18:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:15,640 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 28704 transitions. [2022-01-18 14:18:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 28704 transitions. [2022-01-18 14:18:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:15,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:15,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:15,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-18 14:18:15,653 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -461124344, now seen corresponding path program 9 times [2022-01-18 14:18:15,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064901192] [2022-01-18 14:18:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:15,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:15,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064901192] [2022-01-18 14:18:15,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064901192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198142614] [2022-01-18 14:18:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:15,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:15,726 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:15,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 14:18:15,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:15,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:16,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198142614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:16,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:16,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2022-01-18 14:18:16,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71080421] [2022-01-18 14:18:16,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:18:16,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:18:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:16,166 INFO L87 Difference]: Start difference. First operand 7360 states and 28704 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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) [2022-01-18 14:18:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:17,423 INFO L93 Difference]: Finished difference Result 22955 states and 87500 transitions. [2022-01-18 14:18:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:18:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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 [2022-01-18 14:18:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:17,507 INFO L225 Difference]: With dead ends: 22955 [2022-01-18 14:18:17,507 INFO L226 Difference]: Without dead ends: 22289 [2022-01-18 14:18:17,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 14:18:17,508 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 556 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:17,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 502 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22289 states. [2022-01-18 14:18:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22289 to 13833. [2022-01-18 14:18:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13833 states, 13832 states have (on average 4.011784268363216) internal successors, (55491), 13832 states have internal predecessors, (55491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 55491 transitions. [2022-01-18 14:18:17,878 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 55491 transitions. Word has length 30 [2022-01-18 14:18:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 13833 states and 55491 transitions. [2022-01-18 14:18:17,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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) [2022-01-18 14:18:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 55491 transitions. [2022-01-18 14:18:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:17,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:17,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:17,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 14:18:18,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 14:18:18,101 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1428684140, now seen corresponding path program 10 times [2022-01-18 14:18:18,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:18,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873012053] [2022-01-18 14:18:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:18,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:18,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873012053] [2022-01-18 14:18:18,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873012053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462558343] [2022-01-18 14:18:18,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:18,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:18,176 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 14:18:18,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:18:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:18:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:18,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:18,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:18:18,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:18,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:18:18,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:18,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:18:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462558343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:18,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-18 14:18:18,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235201555] [2022-01-18 14:18:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:18,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:18:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:18:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:18:18,749 INFO L87 Difference]: Start difference. First operand 13833 states and 55491 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:20,595 INFO L93 Difference]: Finished difference Result 25354 states and 97063 transitions. [2022-01-18 14:18:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:18:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:20,675 INFO L225 Difference]: With dead ends: 25354 [2022-01-18 14:18:20,676 INFO L226 Difference]: Without dead ends: 24401 [2022-01-18 14:18:20,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 14:18:20,677 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 591 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:20,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 832 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:18:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24401 states. [2022-01-18 14:18:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24401 to 15204. [2022-01-18 14:18:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15204 states, 15203 states have (on average 3.982437676774321) internal successors, (60545), 15203 states have internal predecessors, (60545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15204 states to 15204 states and 60545 transitions. [2022-01-18 14:18:21,154 INFO L78 Accepts]: Start accepts. Automaton has 15204 states and 60545 transitions. Word has length 30 [2022-01-18 14:18:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:21,154 INFO L470 AbstractCegarLoop]: Abstraction has 15204 states and 60545 transitions. [2022-01-18 14:18:21,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15204 states and 60545 transitions. [2022-01-18 14:18:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:21,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:21,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:21,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 14:18:21,383 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,SelfDestructingSolverStorable38 [2022-01-18 14:18:21,383 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1766374196, now seen corresponding path program 11 times [2022-01-18 14:18:21,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:21,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776545273] [2022-01-18 14:18:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:21,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:21,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:21,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776545273] [2022-01-18 14:18:21,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776545273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:21,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108470907] [2022-01-18 14:18:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:21,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:21,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:21,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:21,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 14:18:21,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:18:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108470907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:21,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:21,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-01-18 14:18:21,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366059373] [2022-01-18 14:18:21,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:21,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:18:21,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:18:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:21,715 INFO L87 Difference]: Start difference. First operand 15204 states and 60545 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:22,091 INFO L93 Difference]: Finished difference Result 22758 states and 90020 transitions. [2022-01-18 14:18:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:22,159 INFO L225 Difference]: With dead ends: 22758 [2022-01-18 14:18:22,160 INFO L226 Difference]: Without dead ends: 22730 [2022-01-18 14:18:22,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:22,160 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 201 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:22,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22730 states. [2022-01-18 14:18:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22730 to 16009. [2022-01-18 14:18:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.006246876561719) internal successors, (64132), 16008 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 64132 transitions. [2022-01-18 14:18:22,777 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 64132 transitions. Word has length 30 [2022-01-18 14:18:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:22,777 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 64132 transitions. [2022-01-18 14:18:22,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 64132 transitions. [2022-01-18 14:18:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:22,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:22,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:22,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 14:18:23,009 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1144493786, now seen corresponding path program 12 times [2022-01-18 14:18:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901913282] [2022-01-18 14:18:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:23,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:23,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901913282] [2022-01-18 14:18:23,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901913282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:23,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343513012] [2022-01-18 14:18:23,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:23,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:23,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:23,096 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:23,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 14:18:23,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:18:23,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:23,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343513012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:23,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 14:18:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052818845] [2022-01-18 14:18:23,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:23,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:18:23,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:18:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:23,560 INFO L87 Difference]: Start difference. First operand 16009 states and 64132 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:24,133 INFO L93 Difference]: Finished difference Result 28320 states and 110538 transitions. [2022-01-18 14:18:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:18:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:24,220 INFO L225 Difference]: With dead ends: 28320 [2022-01-18 14:18:24,220 INFO L226 Difference]: Without dead ends: 27743 [2022-01-18 14:18:24,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:18:24,221 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 571 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:24,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 242 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27743 states. [2022-01-18 14:18:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27743 to 18832. [2022-01-18 14:18:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 18831 states have (on average 4.057883277574213) internal successors, (76414), 18831 states have internal predecessors, (76414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 76414 transitions. [2022-01-18 14:18:24,866 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 76414 transitions. Word has length 30 [2022-01-18 14:18:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 18832 states and 76414 transitions. [2022-01-18 14:18:24,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 76414 transitions. [2022-01-18 14:18:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:24,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:24,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:24,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:25,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:25,100 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1045458162, now seen corresponding path program 13 times [2022-01-18 14:18:25,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518930649] [2022-01-18 14:18:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:25,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:25,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:25,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518930649] [2022-01-18 14:18:25,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518930649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:25,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026135729] [2022-01-18 14:18:25,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:25,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:25,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:25,173 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:25,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 14:18:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:18:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:25,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:18:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:25,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:25,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:25,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:18:25,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:25,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:18:25,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:25,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:18:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026135729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:25,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:25,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-18 14:18:25,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204499469] [2022-01-18 14:18:25,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:25,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:18:25,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:25,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:18:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:18:25,672 INFO L87 Difference]: Start difference. First operand 18832 states and 76414 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:27,790 INFO L93 Difference]: Finished difference Result 27899 states and 109410 transitions. [2022-01-18 14:18:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 14:18:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:27,886 INFO L225 Difference]: With dead ends: 27899 [2022-01-18 14:18:27,886 INFO L226 Difference]: Without dead ends: 27038 [2022-01-18 14:18:27,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=2478, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:18:27,887 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 516 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:27,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 891 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:18:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27038 states. [2022-01-18 14:18:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27038 to 19335. [2022-01-18 14:18:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19335 states, 19334 states have (on average 4.045463949518982) internal successors, (78215), 19334 states have internal predecessors, (78215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19335 states to 19335 states and 78215 transitions. [2022-01-18 14:18:28,437 INFO L78 Accepts]: Start accepts. Automaton has 19335 states and 78215 transitions. Word has length 30 [2022-01-18 14:18:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:28,437 INFO L470 AbstractCegarLoop]: Abstraction has 19335 states and 78215 transitions. [2022-01-18 14:18:28,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19335 states and 78215 transitions. [2022-01-18 14:18:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:28,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:28,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:28,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 14:18:28,671 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,SelfDestructingSolverStorable41 [2022-01-18 14:18:28,672 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1984561458, now seen corresponding path program 1 times [2022-01-18 14:18:28,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459397100] [2022-01-18 14:18:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:28,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:28,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459397100] [2022-01-18 14:18:28,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459397100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208341747] [2022-01-18 14:18:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:28,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:28,742 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:28,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 14:18:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:29,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:29,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:29,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:18:29,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:29,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:18:29,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:29,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:18:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208341747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:29,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:29,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-01-18 14:18:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20470606] [2022-01-18 14:18:29,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:29,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:18:29,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:18:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:18:29,539 INFO L87 Difference]: Start difference. First operand 19335 states and 78215 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:32,789 INFO L93 Difference]: Finished difference Result 30338 states and 117072 transitions. [2022-01-18 14:18:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 14:18:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:32,883 INFO L225 Difference]: With dead ends: 30338 [2022-01-18 14:18:32,883 INFO L226 Difference]: Without dead ends: 28916 [2022-01-18 14:18:32,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=820, Invalid=4730, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 14:18:32,885 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 604 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:32,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1121 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 14:18:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28916 states. [2022-01-18 14:18:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28916 to 19265. [2022-01-18 14:18:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19265 states, 19264 states have (on average 4.046875) internal successors, (77959), 19264 states have internal predecessors, (77959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19265 states to 19265 states and 77959 transitions. [2022-01-18 14:18:33,467 INFO L78 Accepts]: Start accepts. Automaton has 19265 states and 77959 transitions. Word has length 30 [2022-01-18 14:18:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:33,467 INFO L470 AbstractCegarLoop]: Abstraction has 19265 states and 77959 transitions. [2022-01-18 14:18:33,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19265 states and 77959 transitions. [2022-01-18 14:18:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:33,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:33,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:33,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:33,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:33,704 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash 918381320, now seen corresponding path program 14 times [2022-01-18 14:18:33,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172656247] [2022-01-18 14:18:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:33,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:33,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172656247] [2022-01-18 14:18:33,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172656247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408685926] [2022-01-18 14:18:33,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:33,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:33,774 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:33,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 14:18:33,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:33,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:33,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:18:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:33,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408685926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:34,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:34,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 14:18:34,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852948729] [2022-01-18 14:18:34,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:34,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:18:34,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:18:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:34,157 INFO L87 Difference]: Start difference. First operand 19265 states and 77959 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:36,303 INFO L93 Difference]: Finished difference Result 44625 states and 170938 transitions. [2022-01-18 14:18:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 14:18:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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 [2022-01-18 14:18:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:36,596 INFO L225 Difference]: With dead ends: 44625 [2022-01-18 14:18:36,596 INFO L226 Difference]: Without dead ends: 42997 [2022-01-18 14:18:36,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=886, Invalid=3670, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 14:18:36,597 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 835 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:36,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 878 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:18:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42997 states. [2022-01-18 14:18:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42997 to 24301. [2022-01-18 14:18:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 4.098971193415638) internal successors, (99605), 24300 states have internal predecessors, (99605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 99605 transitions. [2022-01-18 14:18:37,584 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 99605 transitions. Word has length 30 [2022-01-18 14:18:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:37,584 INFO L470 AbstractCegarLoop]: Abstraction has 24301 states and 99605 transitions. [2022-01-18 14:18:37,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 99605 transitions. [2022-01-18 14:18:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:37,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:37,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:37,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 14:18:37,830 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,SelfDestructingSolverStorable43 [2022-01-18 14:18:37,830 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 296500910, now seen corresponding path program 15 times [2022-01-18 14:18:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698414432] [2022-01-18 14:18:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:37,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:37,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698414432] [2022-01-18 14:18:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698414432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586535522] [2022-01-18 14:18:37,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:37,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:37,918 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:37,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 14:18:37,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:37,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:38,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:38,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586535522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:38,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:38,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 14:18:38,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450783027] [2022-01-18 14:18:38,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:38,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:18:38,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:18:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:38,215 INFO L87 Difference]: Start difference. First operand 24301 states and 99605 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:39,195 INFO L93 Difference]: Finished difference Result 36554 states and 144065 transitions. [2022-01-18 14:18:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:18:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:39,306 INFO L225 Difference]: With dead ends: 36554 [2022-01-18 14:18:39,307 INFO L226 Difference]: Without dead ends: 35826 [2022-01-18 14:18:39,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:18:39,307 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 508 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:39,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 383 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:18:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35826 states. [2022-01-18 14:18:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35826 to 24880. [2022-01-18 14:18:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24880 states, 24879 states have (on average 4.113107440009647) internal successors, (102330), 24879 states have internal predecessors, (102330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24880 states to 24880 states and 102330 transitions. [2022-01-18 14:18:40,057 INFO L78 Accepts]: Start accepts. Automaton has 24880 states and 102330 transitions. Word has length 30 [2022-01-18 14:18:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 24880 states and 102330 transitions. [2022-01-18 14:18:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24880 states and 102330 transitions. [2022-01-18 14:18:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:40,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:40,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:40,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 14:18:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:40,302 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1426258168, now seen corresponding path program 16 times [2022-01-18 14:18:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:40,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066494934] [2022-01-18 14:18:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:40,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:40,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066494934] [2022-01-18 14:18:40,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066494934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808752440] [2022-01-18 14:18:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:40,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:40,372 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:40,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 14:18:40,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:18:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:40,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:18:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:40,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:40,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:40,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 24 [2022-01-18 14:18:41,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:41,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:18:41,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:41,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:18:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:41,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808752440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:41,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:41,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-18 14:18:41,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514035471] [2022-01-18 14:18:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:18:41,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:18:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:41,159 INFO L87 Difference]: Start difference. First operand 24880 states and 102330 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:44,972 INFO L93 Difference]: Finished difference Result 55484 states and 210244 transitions. [2022-01-18 14:18:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 14:18:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:45,161 INFO L225 Difference]: With dead ends: 55484 [2022-01-18 14:18:45,161 INFO L226 Difference]: Without dead ends: 51916 [2022-01-18 14:18:45,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1415, Invalid=11017, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 14:18:45,164 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1150 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:45,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1346 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 14:18:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51916 states. [2022-01-18 14:18:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51916 to 26647. [2022-01-18 14:18:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 26646 states have (on average 4.111611498911657) internal successors, (109558), 26646 states have internal predecessors, (109558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 109558 transitions. [2022-01-18 14:18:46,341 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 109558 transitions. Word has length 30 [2022-01-18 14:18:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:46,341 INFO L470 AbstractCegarLoop]: Abstraction has 26647 states and 109558 transitions. [2022-01-18 14:18:46,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 109558 transitions. [2022-01-18 14:18:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:46,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:46,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:46,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:46,589 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,SelfDestructingSolverStorable45 [2022-01-18 14:18:46,589 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:46,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1212441790, now seen corresponding path program 17 times [2022-01-18 14:18:46,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:46,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329261446] [2022-01-18 14:18:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:46,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:46,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329261446] [2022-01-18 14:18:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329261446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987875674] [2022-01-18 14:18:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:46,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:46,660 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:46,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 14:18:46,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:18:46,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:46,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987875674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:47,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-18 14:18:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331246893] [2022-01-18 14:18:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:47,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:47,198 INFO L87 Difference]: Start difference. First operand 26647 states and 109558 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:48,338 INFO L93 Difference]: Finished difference Result 69453 states and 279353 transitions. [2022-01-18 14:18:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:18:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:48,882 INFO L225 Difference]: With dead ends: 69453 [2022-01-18 14:18:48,883 INFO L226 Difference]: Without dead ends: 68598 [2022-01-18 14:18:48,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:18:48,883 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 559 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:48,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 433 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:18:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68598 states. [2022-01-18 14:18:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68598 to 42417. [2022-01-18 14:18:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42417 states, 42416 states have (on average 4.229818936250472) internal successors, (179412), 42416 states have internal predecessors, (179412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42417 states to 42417 states and 179412 transitions. [2022-01-18 14:18:50,668 INFO L78 Accepts]: Start accepts. Automaton has 42417 states and 179412 transitions. Word has length 30 [2022-01-18 14:18:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:50,668 INFO L470 AbstractCegarLoop]: Abstraction has 42417 states and 179412 transitions. [2022-01-18 14:18:50,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42417 states and 179412 transitions. [2022-01-18 14:18:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:50,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:50,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:50,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:50,930 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,SelfDestructingSolverStorable46 [2022-01-18 14:18:50,931 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1300393330, now seen corresponding path program 1 times [2022-01-18 14:18:50,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:50,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684170319] [2022-01-18 14:18:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:50,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:50,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684170319] [2022-01-18 14:18:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684170319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056401905] [2022-01-18 14:18:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:50,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:50,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:50,999 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:51,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 14:18:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:51,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:51,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:51,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:18:51,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:51,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:18:51,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:18:51,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 14:18:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:51,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056401905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:51,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:51,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-18 14:18:51,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152737595] [2022-01-18 14:18:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:18:51,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:18:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:51,557 INFO L87 Difference]: Start difference. First operand 42417 states and 179412 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:55,276 INFO L93 Difference]: Finished difference Result 58914 states and 236481 transitions. [2022-01-18 14:18:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 14:18:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:55,501 INFO L225 Difference]: With dead ends: 58914 [2022-01-18 14:18:55,502 INFO L226 Difference]: Without dead ends: 56127 [2022-01-18 14:18:55,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1299, Invalid=8403, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 14:18:55,503 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1357 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:55,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 912 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 14:18:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56127 states. [2022-01-18 14:18:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56127 to 43337. [2022-01-18 14:18:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43337 states, 43336 states have (on average 4.222101716817426) internal successors, (182969), 43336 states have internal predecessors, (182969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43337 states to 43337 states and 182969 transitions. [2022-01-18 14:18:57,199 INFO L78 Accepts]: Start accepts. Automaton has 43337 states and 182969 transitions. Word has length 30 [2022-01-18 14:18:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:57,199 INFO L470 AbstractCegarLoop]: Abstraction has 43337 states and 182969 transitions. [2022-01-18 14:18:57,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43337 states and 182969 transitions. [2022-01-18 14:18:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:18:57,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:57,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:57,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 14:18:57,470 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,SelfDestructingSolverStorable47 [2022-01-18 14:18:57,470 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:18:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1543737064, now seen corresponding path program 18 times [2022-01-18 14:18:57,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:57,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253306666] [2022-01-18 14:18:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:57,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:57,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253306666] [2022-01-18 14:18:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253306666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668882348] [2022-01-18 14:18:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:57,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:57,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:57,542 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:57,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 14:18:57,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:18:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:18:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:57,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:57,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668882348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:57,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:57,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-18 14:18:57,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52592326] [2022-01-18 14:18:57,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:57,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:57,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:57,911 INFO L87 Difference]: Start difference. First operand 43337 states and 182969 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:59,573 INFO L93 Difference]: Finished difference Result 69905 states and 281636 transitions. [2022-01-18 14:18:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:18:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:18:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:59,822 INFO L225 Difference]: With dead ends: 69905 [2022-01-18 14:18:59,823 INFO L226 Difference]: Without dead ends: 68764 [2022-01-18 14:18:59,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1571, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 14:18:59,823 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 509 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:59,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 541 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:18:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68764 states. [2022-01-18 14:19:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68764 to 42944. [2022-01-18 14:19:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42944 states, 42943 states have (on average 4.21998928812612) internal successors, (181219), 42943 states have internal predecessors, (181219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42944 states to 42944 states and 181219 transitions. [2022-01-18 14:19:01,655 INFO L78 Accepts]: Start accepts. Automaton has 42944 states and 181219 transitions. Word has length 30 [2022-01-18 14:19:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:01,655 INFO L470 AbstractCegarLoop]: Abstraction has 42944 states and 181219 transitions. [2022-01-18 14:19:01,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 42944 states and 181219 transitions. [2022-01-18 14:19:01,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:19:01,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:01,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:01,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:01,940 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,SelfDestructingSolverStorable48 [2022-01-18 14:19:01,941 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1456536937, now seen corresponding path program 19 times [2022-01-18 14:19:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:01,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925600223] [2022-01-18 14:19:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:01,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:02,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:02,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925600223] [2022-01-18 14:19:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925600223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:02,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211303024] [2022-01-18 14:19:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:02,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:02,007 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:02,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 14:19:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:19:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:02,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:19:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:02,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211303024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:02,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:02,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-18 14:19:02,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249789988] [2022-01-18 14:19:02,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:02,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:02,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:02,316 INFO L87 Difference]: Start difference. First operand 42944 states and 181219 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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) [2022-01-18 14:19:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:03,377 INFO L93 Difference]: Finished difference Result 70324 states and 288660 transitions. [2022-01-18 14:19:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:19:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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 [2022-01-18 14:19:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:03,643 INFO L225 Difference]: With dead ends: 70324 [2022-01-18 14:19:03,643 INFO L226 Difference]: Without dead ends: 65874 [2022-01-18 14:19:03,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:19:03,643 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 233 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:03,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 404 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65874 states. [2022-01-18 14:19:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65874 to 54754. [2022-01-18 14:19:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54754 states, 54753 states have (on average 4.267163443099008) internal successors, (233640), 54753 states have internal predecessors, (233640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54754 states to 54754 states and 233640 transitions. [2022-01-18 14:19:05,654 INFO L78 Accepts]: Start accepts. Automaton has 54754 states and 233640 transitions. Word has length 30 [2022-01-18 14:19:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 54754 states and 233640 transitions. [2022-01-18 14:19:05,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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) [2022-01-18 14:19:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54754 states and 233640 transitions. [2022-01-18 14:19:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:19:06,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:06,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:06,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 14:19:06,354 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1269123960, now seen corresponding path program 20 times [2022-01-18 14:19:06,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:06,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39610931] [2022-01-18 14:19:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:06,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:06,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:06,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39610931] [2022-01-18 14:19:06,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39610931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:06,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955492848] [2022-01-18 14:19:06,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:06,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:06,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:06,444 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 14:19:06,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:19:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:06,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955492848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:06,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:06,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 14:19:06,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627188120] [2022-01-18 14:19:06,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:06,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:19:06,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:19:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:19:06,960 INFO L87 Difference]: Start difference. First operand 54754 states and 233640 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:11,746 INFO L93 Difference]: Finished difference Result 184005 states and 756361 transitions. [2022-01-18 14:19:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 14:19:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 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 [2022-01-18 14:19:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:12,723 INFO L225 Difference]: With dead ends: 184005 [2022-01-18 14:19:12,723 INFO L226 Difference]: Without dead ends: 181824 [2022-01-18 14:19:12,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1272, Invalid=5534, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 14:19:12,724 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 685 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 4154 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:12,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1394 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4154 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 14:19:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181824 states. [2022-01-18 14:19:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181824 to 106610. [2022-01-18 14:19:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106610 states, 106609 states have (on average 4.35624572034256) internal successors, (464415), 106609 states have internal predecessors, (464415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106610 states to 106610 states and 464415 transitions. [2022-01-18 14:19:18,878 INFO L78 Accepts]: Start accepts. Automaton has 106610 states and 464415 transitions. Word has length 30 [2022-01-18 14:19:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:18,897 INFO L470 AbstractCegarLoop]: Abstraction has 106610 states and 464415 transitions. [2022-01-18 14:19:18,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 106610 states and 464415 transitions. [2022-01-18 14:19:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 14:19:19,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:19,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:19,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 14:19:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:19,323 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash -222328670, now seen corresponding path program 21 times [2022-01-18 14:19:19,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179525217] [2022-01-18 14:19:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:19,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179525217] [2022-01-18 14:19:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179525217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521443486] [2022-01-18 14:19:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:19,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:19,393 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:19,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 14:19:19,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:19:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:19,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:19:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:19,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521443486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:19,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:19,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 14:19:19,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890142001] [2022-01-18 14:19:19,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:19:19,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:19:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:19:19,636 INFO L87 Difference]: Start difference. First operand 106610 states and 464415 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:21,789 INFO L93 Difference]: Finished difference Result 150166 states and 638300 transitions. [2022-01-18 14:19:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:19:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 14:19:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:22,502 INFO L225 Difference]: With dead ends: 150166 [2022-01-18 14:19:22,502 INFO L226 Difference]: Without dead ends: 149066 [2022-01-18 14:19:22,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:19:22,503 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 326 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:22,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 423 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149066 states. [2022-01-18 14:19:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149066 to 48965. [2022-01-18 14:19:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48965 states, 48964 states have (on average 4.276795196470877) internal successors, (209409), 48964 states have internal predecessors, (209409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48965 states to 48965 states and 209409 transitions. [2022-01-18 14:19:25,709 INFO L78 Accepts]: Start accepts. Automaton has 48965 states and 209409 transitions. Word has length 30 [2022-01-18 14:19:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:25,709 INFO L470 AbstractCegarLoop]: Abstraction has 48965 states and 209409 transitions. [2022-01-18 14:19:25,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 48965 states and 209409 transitions. [2022-01-18 14:19:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:25,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:25,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:25,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:26,009 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,SelfDestructingSolverStorable51 [2022-01-18 14:19:26,009 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1542296040, now seen corresponding path program 22 times [2022-01-18 14:19:26,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:26,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412627592] [2022-01-18 14:19:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:26,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:26,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:26,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412627592] [2022-01-18 14:19:26,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412627592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:26,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418546773] [2022-01-18 14:19:26,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:26,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:26,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:26,188 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:26,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 14:19:26,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:19:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:26,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:26,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 14:19:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:27,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418546773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:27,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:27,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-01-18 14:19:27,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734991633] [2022-01-18 14:19:27,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:27,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:19:27,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:19:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:19:27,225 INFO L87 Difference]: Start difference. First operand 48965 states and 209409 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:29,462 INFO L93 Difference]: Finished difference Result 78790 states and 327366 transitions. [2022-01-18 14:19:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 14:19:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:30,197 INFO L225 Difference]: With dead ends: 78790 [2022-01-18 14:19:30,198 INFO L226 Difference]: Without dead ends: 76956 [2022-01-18 14:19:30,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 14:19:30,198 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 558 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:30,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1116 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 14:19:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2022-01-18 14:19:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 51758. [2022-01-18 14:19:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 4.271248333558746) internal successors, (221067), 51757 states have internal predecessors, (221067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 221067 transitions. [2022-01-18 14:19:32,150 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 221067 transitions. Word has length 33 [2022-01-18 14:19:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:32,151 INFO L470 AbstractCegarLoop]: Abstraction has 51758 states and 221067 transitions. [2022-01-18 14:19:32,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 221067 transitions. [2022-01-18 14:19:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:32,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:32,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:32,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:32,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:32,443 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash -626163208, now seen corresponding path program 1 times [2022-01-18 14:19:32,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:32,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710936069] [2022-01-18 14:19:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:32,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710936069] [2022-01-18 14:19:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710936069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537228938] [2022-01-18 14:19:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:32,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:32,565 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:32,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 14:19:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:19:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:32,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:19:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:32,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:32,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:32,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:19:32,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:32,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:19:32,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:32,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:19:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:32,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537228938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:32,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:32,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:19:32,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607348761] [2022-01-18 14:19:32,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:32,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:19:32,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:19:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:19:32,911 INFO L87 Difference]: Start difference. First operand 51758 states and 221067 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:34,044 INFO L93 Difference]: Finished difference Result 55232 states and 233469 transitions. [2022-01-18 14:19:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:19:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:34,248 INFO L225 Difference]: With dead ends: 55232 [2022-01-18 14:19:34,248 INFO L226 Difference]: Without dead ends: 55056 [2022-01-18 14:19:34,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:34,249 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:34,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 403 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55056 states. [2022-01-18 14:19:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55056 to 52745. [2022-01-18 14:19:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52744 states have (on average 4.260977551949037) internal successors, (224741), 52744 states have internal predecessors, (224741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 224741 transitions. [2022-01-18 14:19:35,807 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 224741 transitions. Word has length 33 [2022-01-18 14:19:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:35,807 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 224741 transitions. [2022-01-18 14:19:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 224741 transitions. [2022-01-18 14:19:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:35,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:35,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:35,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:36,101 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,SelfDestructingSolverStorable53 [2022-01-18 14:19:36,101 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2075038142, now seen corresponding path program 1 times [2022-01-18 14:19:36,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8044638] [2022-01-18 14:19:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:36,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:36,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8044638] [2022-01-18 14:19:36,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8044638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973610780] [2022-01-18 14:19:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:36,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:36,237 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:36,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 14:19:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:37,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:37,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:37,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:19:37,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:37,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:19:37,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:37,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:19:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:37,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973610780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:37,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:37,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:19:37,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746704359] [2022-01-18 14:19:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:37,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:37,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:37,652 INFO L87 Difference]: Start difference. First operand 52745 states and 224741 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:38,434 INFO L93 Difference]: Finished difference Result 55223 states and 233029 transitions. [2022-01-18 14:19:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:38,633 INFO L225 Difference]: With dead ends: 55223 [2022-01-18 14:19:38,633 INFO L226 Difference]: Without dead ends: 54857 [2022-01-18 14:19:38,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:19:38,634 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 190 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:38,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 483 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 665 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-01-18 14:19:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54857 states. [2022-01-18 14:19:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54857 to 53763. [2022-01-18 14:19:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53763 states, 53762 states have (on average 4.249544287786913) internal successors, (228464), 53762 states have internal predecessors, (228464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53763 states to 53763 states and 228464 transitions. [2022-01-18 14:19:40,701 INFO L78 Accepts]: Start accepts. Automaton has 53763 states and 228464 transitions. Word has length 33 [2022-01-18 14:19:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:40,701 INFO L470 AbstractCegarLoop]: Abstraction has 53763 states and 228464 transitions. [2022-01-18 14:19:40,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 53763 states and 228464 transitions. [2022-01-18 14:19:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:40,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:40,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:40,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:41,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:41,002 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1347145400, now seen corresponding path program 2 times [2022-01-18 14:19:41,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43385168] [2022-01-18 14:19:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:41,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:41,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43385168] [2022-01-18 14:19:41,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43385168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168747439] [2022-01-18 14:19:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:41,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:41,111 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:41,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 14:19:41,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:41,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:41,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:19:41,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:19:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:41,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:41,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:41,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:19:41,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:41,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:19:41,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:41,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:19:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:41,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168747439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:41,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:41,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:19:41,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471621157] [2022-01-18 14:19:41,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:41,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:19:41,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:19:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:19:41,438 INFO L87 Difference]: Start difference. First operand 53763 states and 228464 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:42,504 INFO L93 Difference]: Finished difference Result 59813 states and 249425 transitions. [2022-01-18 14:19:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:19:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:43,154 INFO L225 Difference]: With dead ends: 59813 [2022-01-18 14:19:43,154 INFO L226 Difference]: Without dead ends: 59755 [2022-01-18 14:19:43,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:19:43,155 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 238 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:43,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 379 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:19:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59755 states. [2022-01-18 14:19:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59755 to 54052. [2022-01-18 14:19:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 54051 states have (on average 4.245693881704316) internal successors, (229484), 54051 states have internal predecessors, (229484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 229484 transitions. [2022-01-18 14:19:44,820 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 229484 transitions. Word has length 33 [2022-01-18 14:19:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:44,821 INFO L470 AbstractCegarLoop]: Abstraction has 54052 states and 229484 transitions. [2022-01-18 14:19:44,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 229484 transitions. [2022-01-18 14:19:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:44,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:44,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:44,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 14:19:45,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:45,124 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1278628516, now seen corresponding path program 2 times [2022-01-18 14:19:45,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:45,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116646893] [2022-01-18 14:19:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:45,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:45,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116646893] [2022-01-18 14:19:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116646893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099981938] [2022-01-18 14:19:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:45,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:45,277 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:45,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:19:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:45,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:45,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:45,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:19:46,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:46,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:19:46,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:46,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:19:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:46,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099981938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:46,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:46,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:19:46,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909042088] [2022-01-18 14:19:46,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:46,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:46,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:46,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:46,282 INFO L87 Difference]: Start difference. First operand 54052 states and 229484 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:47,446 INFO L93 Difference]: Finished difference Result 55894 states and 235531 transitions. [2022-01-18 14:19:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:19:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:47,688 INFO L225 Difference]: With dead ends: 55894 [2022-01-18 14:19:47,689 INFO L226 Difference]: Without dead ends: 54769 [2022-01-18 14:19:47,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:19:47,689 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:47,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 497 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 938 Invalid, 0 Unknown, 697 Unchecked, 0.3s Time] [2022-01-18 14:19:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54769 states. [2022-01-18 14:19:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54769 to 53224. [2022-01-18 14:19:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53224 states, 53223 states have (on average 4.254457659282641) internal successors, (226435), 53223 states have internal predecessors, (226435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53224 states to 53224 states and 226435 transitions. [2022-01-18 14:19:49,284 INFO L78 Accepts]: Start accepts. Automaton has 53224 states and 226435 transitions. Word has length 33 [2022-01-18 14:19:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:49,284 INFO L470 AbstractCegarLoop]: Abstraction has 53224 states and 226435 transitions. [2022-01-18 14:19:49,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53224 states and 226435 transitions. [2022-01-18 14:19:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:49,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:49,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:49,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:49,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 14:19:49,576 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1253608886, now seen corresponding path program 3 times [2022-01-18 14:19:49,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687721866] [2022-01-18 14:19:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:49,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:49,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687721866] [2022-01-18 14:19:49,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687721866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109000987] [2022-01-18 14:19:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:49,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:49,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:49,721 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:49,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:19:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:19:49,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:19:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:50,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:50,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:50,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:19:51,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:51,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2022-01-18 14:19:51,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:51,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2022-01-18 14:19:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:52,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109000987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:52,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:52,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-18 14:19:52,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566071259] [2022-01-18 14:19:52,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:52,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:19:52,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:52,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:19:52,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:19:52,163 INFO L87 Difference]: Start difference. First operand 53224 states and 226435 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:56,110 INFO L93 Difference]: Finished difference Result 58827 states and 243926 transitions. [2022-01-18 14:19:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 14:19:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:19:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:56,326 INFO L225 Difference]: With dead ends: 58827 [2022-01-18 14:19:56,326 INFO L226 Difference]: Without dead ends: 57760 [2022-01-18 14:19:56,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1051, Invalid=5429, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 14:19:56,327 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1069 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:56,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 769 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2353 Invalid, 0 Unknown, 724 Unchecked, 1.0s Time] [2022-01-18 14:19:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57760 states. [2022-01-18 14:19:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57760 to 53698. [2022-01-18 14:19:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53698 states, 53697 states have (on average 4.24898970147308) internal successors, (228158), 53697 states have internal predecessors, (228158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 228158 transitions. [2022-01-18 14:19:58,075 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 228158 transitions. Word has length 33 [2022-01-18 14:19:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:58,076 INFO L470 AbstractCegarLoop]: Abstraction has 53698 states and 228158 transitions. [2022-01-18 14:19:58,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 228158 transitions. [2022-01-18 14:19:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:58,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:58,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:58,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:58,372 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,SelfDestructingSolverStorable57 [2022-01-18 14:19:58,372 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:19:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1730307346, now seen corresponding path program 4 times [2022-01-18 14:19:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937393777] [2022-01-18 14:19:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:58,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:58,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937393777] [2022-01-18 14:19:58,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937393777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841511071] [2022-01-18 14:19:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:58,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:58,508 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:58,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:19:58,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:58,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:58,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:58,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:19:59,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:59,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:19:59,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:19:59,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:19:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:59,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841511071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:59,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:19:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218882969] [2022-01-18 14:19:59,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:59,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:59,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:59,609 INFO L87 Difference]: Start difference. First operand 53698 states and 228158 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:01,132 INFO L93 Difference]: Finished difference Result 55027 states and 232304 transitions. [2022-01-18 14:20:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:20:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:20:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:01,335 INFO L225 Difference]: With dead ends: 55027 [2022-01-18 14:20:01,335 INFO L226 Difference]: Without dead ends: 54287 [2022-01-18 14:20:01,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 14:20:01,336 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 406 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:01,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 547 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:20:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54287 states. [2022-01-18 14:20:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54287 to 53507. [2022-01-18 14:20:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53507 states, 53506 states have (on average 4.2483459798901055) internal successors, (227312), 53506 states have internal predecessors, (227312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53507 states to 53507 states and 227312 transitions. [2022-01-18 14:20:02,966 INFO L78 Accepts]: Start accepts. Automaton has 53507 states and 227312 transitions. Word has length 33 [2022-01-18 14:20:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:02,966 INFO L470 AbstractCegarLoop]: Abstraction has 53507 states and 227312 transitions. [2022-01-18 14:20:02,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53507 states and 227312 transitions. [2022-01-18 14:20:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:20:03,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:03,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:03,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:03,571 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,SelfDestructingSolverStorable58 [2022-01-18 14:20:03,571 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:20:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1561544546, now seen corresponding path program 23 times [2022-01-18 14:20:03,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:03,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129807927] [2022-01-18 14:20:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:03,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:03,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129807927] [2022-01-18 14:20:03,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129807927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637164555] [2022-01-18 14:20:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:03,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:03,672 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:03,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:20:03,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:20:03,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:20:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:04,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:04,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:20:04,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-01-18 14:20:04,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-18 14:20:04,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-18 14:20:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:04,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637164555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:04,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:04,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-18 14:20:04,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656464593] [2022-01-18 14:20:04,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:04,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:04,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:04,587 INFO L87 Difference]: Start difference. First operand 53507 states and 227312 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:35,219 INFO L93 Difference]: Finished difference Result 266315 states and 998702 transitions. [2022-01-18 14:20:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 472 states. [2022-01-18 14:20:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:20:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:36,962 INFO L225 Difference]: With dead ends: 266315 [2022-01-18 14:20:36,962 INFO L226 Difference]: Without dead ends: 241588 [2022-01-18 14:20:36,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100407 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=30504, Invalid=201338, Unknown=0, NotChecked=0, Total=231842 [2022-01-18 14:20:36,972 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 3000 mSDsluCounter, 10592 mSDsCounter, 0 mSdLazyCounter, 19215 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 7149 SdHoareTripleChecker+Invalid, 19841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 19215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:36,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 7149 Invalid, 19841 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [626 Valid, 19215 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-01-18 14:20:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241588 states. [2022-01-18 14:20:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241588 to 105151. [2022-01-18 14:20:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105151 states, 105150 states have (on average 4.288882548739895) internal successors, (450976), 105150 states have internal predecessors, (450976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105151 states to 105151 states and 450976 transitions. [2022-01-18 14:20:44,594 INFO L78 Accepts]: Start accepts. Automaton has 105151 states and 450976 transitions. Word has length 33 [2022-01-18 14:20:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:44,594 INFO L470 AbstractCegarLoop]: Abstraction has 105151 states and 450976 transitions. [2022-01-18 14:20:44,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 105151 states and 450976 transitions. [2022-01-18 14:20:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:20:44,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:44,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:44,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 14:20:45,070 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:20:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash -428595174, now seen corresponding path program 24 times [2022-01-18 14:20:45,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:45,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6705525] [2022-01-18 14:20:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:45,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:45,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:45,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6705525] [2022-01-18 14:20:45,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6705525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:45,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261540776] [2022-01-18 14:20:45,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:45,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:45,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:45,171 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:45,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:20:45,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:20:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:20:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:45,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:45,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 14:20:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:45,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261540776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:45,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:45,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 14:20:45,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455281344] [2022-01-18 14:20:45,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:45,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:20:45,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:20:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:45,577 INFO L87 Difference]: Start difference. First operand 105151 states and 450976 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-18 14:20:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:47,757 INFO L93 Difference]: Finished difference Result 157171 states and 663249 transitions. [2022-01-18 14:20:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:20:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 33 [2022-01-18 14:20:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:48,492 INFO L225 Difference]: With dead ends: 157171 [2022-01-18 14:20:48,493 INFO L226 Difference]: Without dead ends: 153426 [2022-01-18 14:20:48,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:20:48,493 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 619 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:48,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 536 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2022-01-18 14:20:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 111142. [2022-01-18 14:20:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111142 states, 111141 states have (on average 4.314627365238751) internal successors, (479532), 111141 states have internal predecessors, (479532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111142 states to 111142 states and 479532 transitions. [2022-01-18 14:20:54,317 INFO L78 Accepts]: Start accepts. Automaton has 111142 states and 479532 transitions. Word has length 33 [2022-01-18 14:20:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:54,317 INFO L470 AbstractCegarLoop]: Abstraction has 111142 states and 479532 transitions. [2022-01-18 14:20:54,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-18 14:20:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 111142 states and 479532 transitions. [2022-01-18 14:20:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:20:54,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:54,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:54,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:54,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:54,979 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:20:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash -43941796, now seen corresponding path program 25 times [2022-01-18 14:20:54,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:54,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864115077] [2022-01-18 14:20:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:54,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:20:55,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864115077] [2022-01-18 14:20:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864115077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643386004] [2022-01-18 14:20:55,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:55,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:55,074 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:55,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:20:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:20:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:20:55,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:55,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-01-18 14:20:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:20:55,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643386004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:55,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:55,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 14:20:55,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396786110] [2022-01-18 14:20:55,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:20:55,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:20:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:20:55,590 INFO L87 Difference]: Start difference. First operand 111142 states and 479532 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:57,676 INFO L93 Difference]: Finished difference Result 157883 states and 663723 transitions. [2022-01-18 14:20:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:20:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:20:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:58,398 INFO L225 Difference]: With dead ends: 157883 [2022-01-18 14:20:58,398 INFO L226 Difference]: Without dead ends: 155564 [2022-01-18 14:20:58,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:58,398 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 567 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:58,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 657 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155564 states. [2022-01-18 14:21:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155564 to 103407. [2022-01-18 14:21:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103407 states, 103406 states have (on average 4.300127652167186) internal successors, (444659), 103406 states have internal predecessors, (444659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103407 states to 103407 states and 444659 transitions. [2022-01-18 14:21:02,947 INFO L78 Accepts]: Start accepts. Automaton has 103407 states and 444659 transitions. Word has length 33 [2022-01-18 14:21:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:02,947 INFO L470 AbstractCegarLoop]: Abstraction has 103407 states and 444659 transitions. [2022-01-18 14:21:02,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 103407 states and 444659 transitions. [2022-01-18 14:21:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:03,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:03,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:03,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:03,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:03,330 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -869198794, now seen corresponding path program 5 times [2022-01-18 14:21:03,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:03,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618417847] [2022-01-18 14:21:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:03,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:03,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618417847] [2022-01-18 14:21:03,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618417847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419316686] [2022-01-18 14:21:03,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:03,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:03,488 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:03,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:21:03,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:21:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:21:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:04,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:04,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:04,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:21:04,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:04,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:21:04,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:04,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:21:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:04,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419316686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:04,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:04,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:21:04,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140191126] [2022-01-18 14:21:04,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:04,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:21:04,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:21:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:21:04,943 INFO L87 Difference]: Start difference. First operand 103407 states and 444659 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:07,376 INFO L93 Difference]: Finished difference Result 114255 states and 481959 transitions. [2022-01-18 14:21:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 14:21:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:21:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:07,944 INFO L225 Difference]: With dead ends: 114255 [2022-01-18 14:21:07,944 INFO L226 Difference]: Without dead ends: 114045 [2022-01-18 14:21:07,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 14:21:07,945 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 525 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:07,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 643 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1064 Invalid, 0 Unknown, 1181 Unchecked, 0.4s Time] [2022-01-18 14:21:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114045 states. [2022-01-18 14:21:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114045 to 106378. [2022-01-18 14:21:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106378 states, 106377 states have (on average 4.289752484089606) internal successors, (456331), 106377 states have internal predecessors, (456331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106378 states to 106378 states and 456331 transitions. [2022-01-18 14:21:12,212 INFO L78 Accepts]: Start accepts. Automaton has 106378 states and 456331 transitions. Word has length 33 [2022-01-18 14:21:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:12,212 INFO L470 AbstractCegarLoop]: Abstraction has 106378 states and 456331 transitions. [2022-01-18 14:21:12,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 106378 states and 456331 transitions. [2022-01-18 14:21:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:12,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:12,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:12,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:12,718 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1761411824, now seen corresponding path program 6 times [2022-01-18 14:21:12,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:12,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038331152] [2022-01-18 14:21:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:12,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:12,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:12,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038331152] [2022-01-18 14:21:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038331152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:12,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809593818] [2022-01-18 14:21:12,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:12,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:12,899 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:12,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:21:12,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:21:12,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:21:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:13,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:13,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:13,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 14:21:13,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:13,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:21:13,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:13,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:21:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:13,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809593818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:13,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:13,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:21:13,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681535062] [2022-01-18 14:21:13,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:13,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:21:13,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:21:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:21:13,794 INFO L87 Difference]: Start difference. First operand 106378 states and 456331 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:16,909 INFO L93 Difference]: Finished difference Result 126893 states and 533544 transitions. [2022-01-18 14:21:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 14:21:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:21:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:17,483 INFO L225 Difference]: With dead ends: 126893 [2022-01-18 14:21:17,484 INFO L226 Difference]: Without dead ends: 125651 [2022-01-18 14:21:17,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=629, Invalid=3661, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 14:21:17,484 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 456 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 559 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:17,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 692 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1234 Invalid, 0 Unknown, 559 Unchecked, 0.5s Time] [2022-01-18 14:21:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125651 states. [2022-01-18 14:21:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125651 to 107742. [2022-01-18 14:21:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107742 states, 107741 states have (on average 4.284246479984407) internal successors, (461589), 107741 states have internal predecessors, (461589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107742 states to 107742 states and 461589 transitions. [2022-01-18 14:21:21,840 INFO L78 Accepts]: Start accepts. Automaton has 107742 states and 461589 transitions. Word has length 33 [2022-01-18 14:21:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:21,840 INFO L470 AbstractCegarLoop]: Abstraction has 107742 states and 461589 transitions. [2022-01-18 14:21:21,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 107742 states and 461589 transitions. [2022-01-18 14:21:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:22,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:22,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:22,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:22,245 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash -549662216, now seen corresponding path program 2 times [2022-01-18 14:21:22,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:22,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488510079] [2022-01-18 14:21:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:22,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:22,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488510079] [2022-01-18 14:21:22,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488510079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752757719] [2022-01-18 14:21:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:22,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:22,364 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:22,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:21:22,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:21:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:22,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:21:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:22,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:22,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:22,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 14:21:22,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:22,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:21:22,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:22,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:21:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752757719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:22,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 14:21:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109161294] [2022-01-18 14:21:22,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:21:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:21:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:21:22,727 INFO L87 Difference]: Start difference. First operand 107742 states and 461589 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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) [2022-01-18 14:21:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:24,372 INFO L93 Difference]: Finished difference Result 111901 states and 474842 transitions. [2022-01-18 14:21:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:21:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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 33 [2022-01-18 14:21:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:24,918 INFO L225 Difference]: With dead ends: 111901 [2022-01-18 14:21:24,918 INFO L226 Difference]: Without dead ends: 111901 [2022-01-18 14:21:24,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:21:24,918 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 238 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:24,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 317 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111901 states. [2022-01-18 14:21:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111901 to 107804. [2022-01-18 14:21:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107804 states, 107803 states have (on average 4.283730508427409) internal successors, (461799), 107803 states have internal predecessors, (461799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107804 states to 107804 states and 461799 transitions. [2022-01-18 14:21:29,213 INFO L78 Accepts]: Start accepts. Automaton has 107804 states and 461799 transitions. Word has length 33 [2022-01-18 14:21:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:29,213 INFO L470 AbstractCegarLoop]: Abstraction has 107804 states and 461799 transitions. [2022-01-18 14:21:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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) [2022-01-18 14:21:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 107804 states and 461799 transitions. [2022-01-18 14:21:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:29,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:29,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:29,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:29,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:29,614 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 366470616, now seen corresponding path program 1 times [2022-01-18 14:21:29,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:29,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811549278] [2022-01-18 14:21:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:29,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:29,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811549278] [2022-01-18 14:21:29,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811549278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973639819] [2022-01-18 14:21:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:29,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:29,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:29,772 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:29,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:21:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:21:29,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:30,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:30,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:30,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:21:30,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:30,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:21:30,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:30,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:21:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973639819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:30,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:30,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:21:30,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742952693] [2022-01-18 14:21:30,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:30,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:21:30,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:21:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:21:30,745 INFO L87 Difference]: Start difference. First operand 107804 states and 461799 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:32,999 INFO L93 Difference]: Finished difference Result 113322 states and 479625 transitions. [2022-01-18 14:21:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:21:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:21:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:33,529 INFO L225 Difference]: With dead ends: 113322 [2022-01-18 14:21:33,529 INFO L226 Difference]: Without dead ends: 111885 [2022-01-18 14:21:33,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:21:33,530 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 376 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:33,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 920 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2002 Invalid, 0 Unknown, 397 Unchecked, 0.8s Time] [2022-01-18 14:21:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2022-01-18 14:21:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 108370. [2022-01-18 14:21:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108370 states, 108369 states have (on average 4.279895542083068) internal successors, (463808), 108369 states have internal predecessors, (463808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108370 states to 108370 states and 463808 transitions. [2022-01-18 14:21:37,789 INFO L78 Accepts]: Start accepts. Automaton has 108370 states and 463808 transitions. Word has length 33 [2022-01-18 14:21:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:37,789 INFO L470 AbstractCegarLoop]: Abstraction has 108370 states and 463808 transitions. [2022-01-18 14:21:37,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 108370 states and 463808 transitions. [2022-01-18 14:21:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:38,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:38,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:38,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:38,202 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,SelfDestructingSolverStorable65 [2022-01-18 14:21:38,203 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2105226590, now seen corresponding path program 3 times [2022-01-18 14:21:38,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:38,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023890921] [2022-01-18 14:21:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:38,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:38,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023890921] [2022-01-18 14:21:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023890921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290065820] [2022-01-18 14:21:38,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:38,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:38,394 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:21:38,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:21:38,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:21:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:38,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:21:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:39,001 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 14:21:39,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2022-01-18 14:21:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:21:40,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:40,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 72 [2022-01-18 14:21:40,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:40,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-01-18 14:21:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:40,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290065820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:40,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:40,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-18 14:21:40,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861110506] [2022-01-18 14:21:40,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:40,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:21:40,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:40,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:21:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:21:40,551 INFO L87 Difference]: Start difference. First operand 108370 states and 463808 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:46,523 INFO L93 Difference]: Finished difference Result 132295 states and 547373 transitions. [2022-01-18 14:21:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 14:21:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:21:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:47,152 INFO L225 Difference]: With dead ends: 132295 [2022-01-18 14:21:47,152 INFO L226 Difference]: Without dead ends: 132063 [2022-01-18 14:21:47,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1302, Invalid=8400, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 14:21:47,153 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 820 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:47,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1458 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3293 Invalid, 0 Unknown, 671 Unchecked, 1.4s Time] [2022-01-18 14:21:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2022-01-18 14:21:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 109527. [2022-01-18 14:21:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 4.270958493873601) internal successors, (467781), 109526 states have internal predecessors, (467781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 467781 transitions. [2022-01-18 14:21:51,593 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 467781 transitions. Word has length 33 [2022-01-18 14:21:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:51,593 INFO L470 AbstractCegarLoop]: Abstraction has 109527 states and 467781 transitions. [2022-01-18 14:21:51,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 467781 transitions. [2022-01-18 14:21:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:21:51,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:51,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:51,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:51,992 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,SelfDestructingSolverStorable66 [2022-01-18 14:21:51,993 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:21:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash 440573310, now seen corresponding path program 1 times [2022-01-18 14:21:51,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:51,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614439919] [2022-01-18 14:21:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:51,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:52,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614439919] [2022-01-18 14:21:52,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614439919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285276859] [2022-01-18 14:21:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:52,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:52,242 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:52,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:21:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:21:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:52,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:52,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 14:21:53,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:53,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:21:53,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:21:53,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:21:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:53,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285276859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:53,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:53,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 14:21:53,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715451932] [2022-01-18 14:21:53,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:53,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:21:53,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:21:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:21:53,239 INFO L87 Difference]: Start difference. First operand 109527 states and 467781 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:56,400 INFO L93 Difference]: Finished difference Result 132109 states and 549570 transitions. [2022-01-18 14:21:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 14:21:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:21:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:57,510 INFO L225 Difference]: With dead ends: 132109 [2022-01-18 14:21:57,511 INFO L226 Difference]: Without dead ends: 130716 [2022-01-18 14:21:57,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 14:21:57,511 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 494 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:57,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 844 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 14:21:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130716 states. [2022-01-18 14:22:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130716 to 110131. [2022-01-18 14:22:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110131 states, 110130 states have (on average 4.267202397166985) internal successors, (469947), 110130 states have internal predecessors, (469947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110131 states to 110131 states and 469947 transitions. [2022-01-18 14:22:02,090 INFO L78 Accepts]: Start accepts. Automaton has 110131 states and 469947 transitions. Word has length 33 [2022-01-18 14:22:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:02,091 INFO L470 AbstractCegarLoop]: Abstraction has 110131 states and 469947 transitions. [2022-01-18 14:22:02,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 110131 states and 469947 transitions. [2022-01-18 14:22:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:02,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:02,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:02,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:02,542 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,SelfDestructingSolverStorable67 [2022-01-18 14:22:02,543 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash 48779896, now seen corresponding path program 4 times [2022-01-18 14:22:02,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:02,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457784404] [2022-01-18 14:22:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:02,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:02,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457784404] [2022-01-18 14:22:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457784404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981639131] [2022-01-18 14:22:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:22:02,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:02,735 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:02,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:22:02,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:22:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:22:02,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:02,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:22:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:02,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:02,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:02,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 14:22:03,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:03,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:22:03,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:03,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:22:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:03,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981639131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:03,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:03,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 14:22:03,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688620317] [2022-01-18 14:22:03,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:03,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:22:03,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:22:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:22:03,138 INFO L87 Difference]: Start difference. First operand 110131 states and 469947 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:04,939 INFO L93 Difference]: Finished difference Result 113781 states and 481636 transitions. [2022-01-18 14:22:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:22:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:05,534 INFO L225 Difference]: With dead ends: 113781 [2022-01-18 14:22:05,534 INFO L226 Difference]: Without dead ends: 113781 [2022-01-18 14:22:05,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:05,534 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 166 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 332 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:22:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113781 states. [2022-01-18 14:22:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113781 to 110137. [2022-01-18 14:22:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110137 states, 110136 states have (on average 4.267169681121523) internal successors, (469969), 110136 states have internal predecessors, (469969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110137 states to 110137 states and 469969 transitions. [2022-01-18 14:22:09,861 INFO L78 Accepts]: Start accepts. Automaton has 110137 states and 469969 transitions. Word has length 33 [2022-01-18 14:22:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:09,861 INFO L470 AbstractCegarLoop]: Abstraction has 110137 states and 469969 transitions. [2022-01-18 14:22:09,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 110137 states and 469969 transitions. [2022-01-18 14:22:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:10,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:10,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:10,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:10,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:10,423 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1955188072, now seen corresponding path program 2 times [2022-01-18 14:22:10,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:10,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981249521] [2022-01-18 14:22:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:10,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:10,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981249521] [2022-01-18 14:22:10,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981249521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051109172] [2022-01-18 14:22:10,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:10,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:10,630 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:10,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:22:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:11,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:11,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:11,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:22:11,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:11,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:22:11,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:11,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:22:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051109172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:11,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:11,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:22:11,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149785071] [2022-01-18 14:22:11,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:11,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:22:11,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:22:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:22:11,622 INFO L87 Difference]: Start difference. First operand 110137 states and 469969 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:15,827 INFO L93 Difference]: Finished difference Result 132978 states and 554601 transitions. [2022-01-18 14:22:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 14:22:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:16,439 INFO L225 Difference]: With dead ends: 132978 [2022-01-18 14:22:16,439 INFO L226 Difference]: Without dead ends: 131855 [2022-01-18 14:22:16,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=652, Invalid=4178, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 14:22:16,440 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 397 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 4125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:16,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1244 Invalid, 4125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3532 Invalid, 0 Unknown, 565 Unchecked, 1.4s Time] [2022-01-18 14:22:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131855 states. [2022-01-18 14:22:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131855 to 110356. [2022-01-18 14:22:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110356 states, 110355 states have (on average 4.266594173349644) internal successors, (470840), 110355 states have internal predecessors, (470840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110356 states to 110356 states and 470840 transitions. [2022-01-18 14:22:21,666 INFO L78 Accepts]: Start accepts. Automaton has 110356 states and 470840 transitions. Word has length 33 [2022-01-18 14:22:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:21,667 INFO L470 AbstractCegarLoop]: Abstraction has 110356 states and 470840 transitions. [2022-01-18 14:22:21,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 110356 states and 470840 transitions. [2022-01-18 14:22:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:21,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:21,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:21,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:22,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 14:22:22,073 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:22,081 INFO L85 PathProgramCache]: Analyzing trace with hash -661508158, now seen corresponding path program 2 times [2022-01-18 14:22:22,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:22,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607554342] [2022-01-18 14:22:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:22,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:22,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607554342] [2022-01-18 14:22:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607554342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695563557] [2022-01-18 14:22:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:22,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:22,942 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:22,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:22:22,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:22:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:23,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:23,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:23,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 14:22:23,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:23,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:22:23,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:23,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:22:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:23,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695563557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:23,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:23,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 14:22:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023723618] [2022-01-18 14:22:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:23,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:22:23,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:22:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:22:23,878 INFO L87 Difference]: Start difference. First operand 110356 states and 470840 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:26,333 INFO L93 Difference]: Finished difference Result 116410 states and 489911 transitions. [2022-01-18 14:22:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:22:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:26,911 INFO L225 Difference]: With dead ends: 116410 [2022-01-18 14:22:26,911 INFO L226 Difference]: Without dead ends: 114671 [2022-01-18 14:22:26,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:22:26,911 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 436 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:26,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 779 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:22:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114671 states. [2022-01-18 14:22:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114671 to 110387. [2022-01-18 14:22:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110387 states, 110386 states have (on average 4.265024550214701) internal successors, (470799), 110386 states have internal predecessors, (470799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110387 states to 110387 states and 470799 transitions. [2022-01-18 14:22:30,584 INFO L78 Accepts]: Start accepts. Automaton has 110387 states and 470799 transitions. Word has length 33 [2022-01-18 14:22:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 110387 states and 470799 transitions. [2022-01-18 14:22:30,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 110387 states and 470799 transitions. [2022-01-18 14:22:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:31,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:31,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:31,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:31,639 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1091300046, now seen corresponding path program 5 times [2022-01-18 14:22:31,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310587761] [2022-01-18 14:22:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:31,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:31,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310587761] [2022-01-18 14:22:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310587761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137905032] [2022-01-18 14:22:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:31,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:31,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:31,792 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:22:31,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:22:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:22:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:31,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:22:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:31,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:32,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:32,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 14:22:32,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:32,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:22:32,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:32,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:22:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:32,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137905032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:32,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:32,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 14:22:32,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906869206] [2022-01-18 14:22:32,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:32,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:22:32,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:22:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:22:32,166 INFO L87 Difference]: Start difference. First operand 110387 states and 470799 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:33,342 INFO L93 Difference]: Finished difference Result 113193 states and 479370 transitions. [2022-01-18 14:22:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:22:33,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:34,547 INFO L225 Difference]: With dead ends: 113193 [2022-01-18 14:22:34,548 INFO L226 Difference]: Without dead ends: 113193 [2022-01-18 14:22:34,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:34,548 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 161 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:34,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 329 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:22:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113193 states. [2022-01-18 14:22:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113193 to 110477. [2022-01-18 14:22:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110477 states, 110476 states have (on average 4.2644194214127955) internal successors, (471116), 110476 states have internal predecessors, (471116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110477 states to 110477 states and 471116 transitions. [2022-01-18 14:22:38,250 INFO L78 Accepts]: Start accepts. Automaton has 110477 states and 471116 transitions. Word has length 33 [2022-01-18 14:22:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 110477 states and 471116 transitions. [2022-01-18 14:22:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 110477 states and 471116 transitions. [2022-01-18 14:22:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:39,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:39,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:39,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:39,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:39,401 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash -573353234, now seen corresponding path program 3 times [2022-01-18 14:22:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889637794] [2022-01-18 14:22:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:39,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:39,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:39,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889637794] [2022-01-18 14:22:39,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889637794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:39,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693083343] [2022-01-18 14:22:39,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:22:39,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:39,607 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:39,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:22:39,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:22:39,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:22:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:40,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:40,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:40,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-01-18 14:22:40,598 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 14:22:40,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 54 [2022-01-18 14:22:40,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:22:40,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:40,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 50 [2022-01-18 14:22:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693083343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:40,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:40,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-01-18 14:22:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831504685] [2022-01-18 14:22:40,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:40,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:22:40,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:22:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:22:40,678 INFO L87 Difference]: Start difference. First operand 110477 states and 471116 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:46,636 INFO L93 Difference]: Finished difference Result 157435 states and 644616 transitions. [2022-01-18 14:22:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 14:22:46,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:47,844 INFO L225 Difference]: With dead ends: 157435 [2022-01-18 14:22:47,844 INFO L226 Difference]: Without dead ends: 155527 [2022-01-18 14:22:47,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1538, Invalid=9382, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 14:22:47,844 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1072 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3800 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:47,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1261 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3800 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 14:22:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155527 states. [2022-01-18 14:22:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155527 to 111735. [2022-01-18 14:22:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111735 states, 111734 states have (on average 4.258641058227576) internal successors, (475835), 111734 states have internal predecessors, (475835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111735 states to 111735 states and 475835 transitions. [2022-01-18 14:22:52,894 INFO L78 Accepts]: Start accepts. Automaton has 111735 states and 475835 transitions. Word has length 33 [2022-01-18 14:22:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 111735 states and 475835 transitions. [2022-01-18 14:22:52,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 111735 states and 475835 transitions. [2022-01-18 14:22:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:22:53,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:53,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:53,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:53,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:53,308 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:22:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 926979758, now seen corresponding path program 3 times [2022-01-18 14:22:53,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:53,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598617462] [2022-01-18 14:22:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:53,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:53,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598617462] [2022-01-18 14:22:53,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598617462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261267857] [2022-01-18 14:22:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:22:53,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:53,526 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:53,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:22:53,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:22:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:22:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:53,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:54,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:54,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:22:54,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:54,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:22:54,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:22:54,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:22:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:54,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261267857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:54,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:54,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 14:22:54,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872686432] [2022-01-18 14:22:54,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:22:54,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:22:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:54,408 INFO L87 Difference]: Start difference. First operand 111735 states and 475835 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:56,693 INFO L93 Difference]: Finished difference Result 115031 states and 486231 transitions. [2022-01-18 14:22:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:22:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:22:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:57,260 INFO L225 Difference]: With dead ends: 115031 [2022-01-18 14:22:57,260 INFO L226 Difference]: Without dead ends: 114127 [2022-01-18 14:22:57,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:22:57,261 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:57,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 704 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:22:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114127 states. [2022-01-18 14:23:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114127 to 111784. [2022-01-18 14:23:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111784 states, 111783 states have (on average 4.257990928853225) internal successors, (475971), 111783 states have internal predecessors, (475971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111784 states to 111784 states and 475971 transitions. [2022-01-18 14:23:01,519 INFO L78 Accepts]: Start accepts. Automaton has 111784 states and 475971 transitions. Word has length 33 [2022-01-18 14:23:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 111784 states and 475971 transitions. [2022-01-18 14:23:01,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 111784 states and 475971 transitions. [2022-01-18 14:23:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:01,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:01,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:01,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:01,925 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,SelfDestructingSolverStorable73 [2022-01-18 14:23:01,925 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash -26068854, now seen corresponding path program 6 times [2022-01-18 14:23:01,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:01,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116032434] [2022-01-18 14:23:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:01,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:02,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116032434] [2022-01-18 14:23:02,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116032434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842601189] [2022-01-18 14:23:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:23:02,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:02,066 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:02,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:23:02,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:23:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:23:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:02,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:23:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:02,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:02,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 14:23:02,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:02,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 14:23:02,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:02,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 14:23:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:02,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842601189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:02,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:02,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 14:23:02,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429979796] [2022-01-18 14:23:02,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:02,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:23:02,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:23:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:23:02,432 INFO L87 Difference]: Start difference. First operand 111784 states and 475971 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:04,108 INFO L93 Difference]: Finished difference Result 114614 states and 484536 transitions. [2022-01-18 14:23:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:23:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:04,647 INFO L225 Difference]: With dead ends: 114614 [2022-01-18 14:23:04,647 INFO L226 Difference]: Without dead ends: 114614 [2022-01-18 14:23:04,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:23:04,647 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 179 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:04,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 322 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:23:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114614 states. [2022-01-18 14:23:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114614 to 111630. [2022-01-18 14:23:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111630 states, 111629 states have (on average 4.258929131318922) internal successors, (475420), 111629 states have internal predecessors, (475420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111630 states to 111630 states and 475420 transitions. [2022-01-18 14:23:09,063 INFO L78 Accepts]: Start accepts. Automaton has 111630 states and 475420 transitions. Word has length 33 [2022-01-18 14:23:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:09,063 INFO L470 AbstractCegarLoop]: Abstraction has 111630 states and 475420 transitions. [2022-01-18 14:23:09,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 111630 states and 475420 transitions. [2022-01-18 14:23:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:09,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:09,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:09,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:09,463 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,SelfDestructingSolverStorable74 [2022-01-18 14:23:09,464 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1690722134, now seen corresponding path program 4 times [2022-01-18 14:23:09,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:09,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6188058] [2022-01-18 14:23:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:09,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:09,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6188058] [2022-01-18 14:23:09,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6188058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298822167] [2022-01-18 14:23:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:09,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:09,674 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:09,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:23:09,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:09,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:09,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:23:09,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:10,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:10,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:10,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-01-18 14:23:10,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:10,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 14:23:10,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:10,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 14:23:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298822167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:10,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 14:23:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022697850] [2022-01-18 14:23:10,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:10,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:23:10,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:23:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:23:10,585 INFO L87 Difference]: Start difference. First operand 111630 states and 475420 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:13,912 INFO L93 Difference]: Finished difference Result 131686 states and 549004 transitions. [2022-01-18 14:23:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 14:23:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:14,968 INFO L225 Difference]: With dead ends: 131686 [2022-01-18 14:23:14,968 INFO L226 Difference]: Without dead ends: 130178 [2022-01-18 14:23:14,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 14:23:14,969 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 562 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:14,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1129 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3224 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 14:23:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130178 states. [2022-01-18 14:23:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130178 to 111603. [2022-01-18 14:23:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111603 states, 111602 states have (on average 4.261106431784377) internal successors, (475548), 111602 states have internal predecessors, (475548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111603 states to 111603 states and 475548 transitions. [2022-01-18 14:23:18,878 INFO L78 Accepts]: Start accepts. Automaton has 111603 states and 475548 transitions. Word has length 33 [2022-01-18 14:23:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 111603 states and 475548 transitions. [2022-01-18 14:23:18,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111603 states and 475548 transitions. [2022-01-18 14:23:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:19,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:19,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:19,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 14:23:19,965 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,SelfDestructingSolverStorable75 [2022-01-18 14:23:19,965 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1111394312, now seen corresponding path program 3 times [2022-01-18 14:23:19,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694462707] [2022-01-18 14:23:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:19,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:20,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:20,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694462707] [2022-01-18 14:23:20,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694462707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416368654] [2022-01-18 14:23:20,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:20,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:20,092 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:20,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:23:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:23:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:20,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:20,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:21,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:21,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2022-01-18 14:23:21,760 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 14:23:21,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 53 [2022-01-18 14:23:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:23:21,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:21,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2022-01-18 14:23:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:22,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416368654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:22,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:22,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-01-18 14:23:22,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924361886] [2022-01-18 14:23:22,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:22,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 14:23:22,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 14:23:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:23:22,017 INFO L87 Difference]: Start difference. First operand 111603 states and 475548 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:30,720 INFO L93 Difference]: Finished difference Result 131142 states and 545110 transitions. [2022-01-18 14:23:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-18 14:23:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:31,359 INFO L225 Difference]: With dead ends: 131142 [2022-01-18 14:23:31,359 INFO L226 Difference]: Without dead ends: 130569 [2022-01-18 14:23:31,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 60 SyntacticMatches, 29 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9834 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1866, Invalid=20186, Unknown=0, NotChecked=0, Total=22052 [2022-01-18 14:23:31,360 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 643 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 3391 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 6255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2805 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:31,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2481 Invalid, 6255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3391 Invalid, 0 Unknown, 2805 Unchecked, 1.6s Time] [2022-01-18 14:23:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130569 states. [2022-01-18 14:23:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130569 to 113418. [2022-01-18 14:23:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113418 states, 113417 states have (on average 4.25434458679034) internal successors, (482515), 113417 states have internal predecessors, (482515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113418 states to 113418 states and 482515 transitions. [2022-01-18 14:23:36,150 INFO L78 Accepts]: Start accepts. Automaton has 113418 states and 482515 transitions. Word has length 33 [2022-01-18 14:23:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 113418 states and 482515 transitions. [2022-01-18 14:23:36,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 113418 states and 482515 transitions. [2022-01-18 14:23:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:36,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:36,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:36,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:36,558 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,SelfDestructingSolverStorable76 [2022-01-18 14:23:36,558 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1040506978, now seen corresponding path program 4 times [2022-01-18 14:23:36,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:36,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24881072] [2022-01-18 14:23:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:36,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:36,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24881072] [2022-01-18 14:23:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24881072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468088378] [2022-01-18 14:23:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:36,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:36,680 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:23:36,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:36,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:36,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:23:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:36,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:23:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:36,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:36,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:23:36,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:36,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:23:36,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:36,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:23:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:37,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468088378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:37,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:37,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 14:23:37,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537236139] [2022-01-18 14:23:37,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:23:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:23:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:23:37,047 INFO L87 Difference]: Start difference. First operand 113418 states and 482515 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:39,652 INFO L93 Difference]: Finished difference Result 135782 states and 559081 transitions. [2022-01-18 14:23:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 14:23:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:40,245 INFO L225 Difference]: With dead ends: 135782 [2022-01-18 14:23:40,246 INFO L226 Difference]: Without dead ends: 135454 [2022-01-18 14:23:40,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 14:23:40,246 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 453 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:40,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 837 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:23:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135454 states. [2022-01-18 14:23:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135454 to 115676. [2022-01-18 14:23:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115676 states, 115675 states have (on average 4.249630430084288) internal successors, (491576), 115675 states have internal predecessors, (491576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115676 states to 115676 states and 491576 transitions. [2022-01-18 14:23:45,620 INFO L78 Accepts]: Start accepts. Automaton has 115676 states and 491576 transitions. Word has length 33 [2022-01-18 14:23:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:45,620 INFO L470 AbstractCegarLoop]: Abstraction has 115676 states and 491576 transitions. [2022-01-18 14:23:45,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 115676 states and 491576 transitions. [2022-01-18 14:23:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:45,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:45,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:45,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:46,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:46,073 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1589807038, now seen corresponding path program 7 times [2022-01-18 14:23:46,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:46,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867168672] [2022-01-18 14:23:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:46,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867168672] [2022-01-18 14:23:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867168672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004252728] [2022-01-18 14:23:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:23:46,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:46,228 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:46,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:23:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:46,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:46,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:46,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:23:47,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:47,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:23:47,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:47,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:23:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:47,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004252728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:47,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:47,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:23:47,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893899741] [2022-01-18 14:23:47,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:23:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:23:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:23:47,146 INFO L87 Difference]: Start difference. First operand 115676 states and 491576 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:49,591 INFO L93 Difference]: Finished difference Result 125793 states and 526164 transitions. [2022-01-18 14:23:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:23:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:50,220 INFO L225 Difference]: With dead ends: 125793 [2022-01-18 14:23:50,220 INFO L226 Difference]: Without dead ends: 125636 [2022-01-18 14:23:50,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:23:50,221 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 396 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:50,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 814 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1651 Invalid, 0 Unknown, 345 Unchecked, 0.6s Time] [2022-01-18 14:23:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125636 states. [2022-01-18 14:23:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125636 to 116869. [2022-01-18 14:23:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116869 states, 116868 states have (on average 4.2461067186911725) internal successors, (496234), 116868 states have internal predecessors, (496234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116869 states to 116869 states and 496234 transitions. [2022-01-18 14:23:55,389 INFO L78 Accepts]: Start accepts. Automaton has 116869 states and 496234 transitions. Word has length 33 [2022-01-18 14:23:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:55,389 INFO L470 AbstractCegarLoop]: Abstraction has 116869 states and 496234 transitions. [2022-01-18 14:23:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 116869 states and 496234 transitions. [2022-01-18 14:23:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:23:55,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:55,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:55,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:55,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:55,812 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:23:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1693413474, now seen corresponding path program 5 times [2022-01-18 14:23:55,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:55,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454747192] [2022-01-18 14:23:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:55,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:55,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454747192] [2022-01-18 14:23:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454747192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714573971] [2022-01-18 14:23:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:55,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:55,947 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:55,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:23:55,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:23:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:23:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:56,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:23:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:56,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:56,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:56,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:23:56,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:56,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:23:56,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:23:56,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:23:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:57,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714573971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:57,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:57,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:23:57,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472330208] [2022-01-18 14:23:57,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:57,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:23:57,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:23:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:23:57,001 INFO L87 Difference]: Start difference. First operand 116869 states and 496234 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:59,110 INFO L93 Difference]: Finished difference Result 143634 states and 590203 transitions. [2022-01-18 14:23:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 14:23:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:23:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:00,379 INFO L225 Difference]: With dead ends: 143634 [2022-01-18 14:24:00,379 INFO L226 Difference]: Without dead ends: 142971 [2022-01-18 14:24:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:24:00,380 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 468 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 913 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:24:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142971 states. [2022-01-18 14:24:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142971 to 119839. [2022-01-18 14:24:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119839 states, 119838 states have (on average 4.238905856239256) internal successors, (507982), 119838 states have internal predecessors, (507982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119839 states to 119839 states and 507982 transitions. [2022-01-18 14:24:05,394 INFO L78 Accepts]: Start accepts. Automaton has 119839 states and 507982 transitions. Word has length 33 [2022-01-18 14:24:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:05,394 INFO L470 AbstractCegarLoop]: Abstraction has 119839 states and 507982 transitions. [2022-01-18 14:24:05,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 119839 states and 507982 transitions. [2022-01-18 14:24:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:24:05,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:05,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:05,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 14:24:05,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 14:24:05,808 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:24:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:05,809 INFO L85 PathProgramCache]: Analyzing trace with hash 633768234, now seen corresponding path program 8 times [2022-01-18 14:24:05,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:05,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242024532] [2022-01-18 14:24:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:05,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:05,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242024532] [2022-01-18 14:24:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242024532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128513401] [2022-01-18 14:24:05,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:05,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:05,939 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:05,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 14:24:05,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:24:05,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:06,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:06,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:06,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:24:06,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:06,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:24:06,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:06,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:24:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128513401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:07,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:07,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:24:07,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22861475] [2022-01-18 14:24:07,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:07,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:24:07,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:24:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:24:07,356 INFO L87 Difference]: Start difference. First operand 119839 states and 507982 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:09,137 INFO L93 Difference]: Finished difference Result 129184 states and 539154 transitions. [2022-01-18 14:24:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:24:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:24:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:10,236 INFO L225 Difference]: With dead ends: 129184 [2022-01-18 14:24:10,236 INFO L226 Difference]: Without dead ends: 129110 [2022-01-18 14:24:10,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:24:10,236 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 406 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:10,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 722 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1344 Invalid, 0 Unknown, 232 Unchecked, 0.5s Time] [2022-01-18 14:24:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129110 states. [2022-01-18 14:24:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129110 to 119993. [2022-01-18 14:24:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119993 states, 119992 states have (on average 4.237399159943997) internal successors, (508454), 119992 states have internal predecessors, (508454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119993 states to 119993 states and 508454 transitions. [2022-01-18 14:24:15,052 INFO L78 Accepts]: Start accepts. Automaton has 119993 states and 508454 transitions. Word has length 33 [2022-01-18 14:24:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:15,052 INFO L470 AbstractCegarLoop]: Abstraction has 119993 states and 508454 transitions. [2022-01-18 14:24:15,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 119993 states and 508454 transitions. [2022-01-18 14:24:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:24:15,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:15,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:15,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:15,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:15,506 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:24:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash -258444796, now seen corresponding path program 9 times [2022-01-18 14:24:15,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:15,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444646245] [2022-01-18 14:24:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:15,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:15,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444646245] [2022-01-18 14:24:15,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444646245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:15,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823301991] [2022-01-18 14:24:15,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:15,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:15,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:15,665 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:15,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 14:24:15,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:24:15,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:24:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:16,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:16,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:16,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 14:24:16,958 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 14:24:16,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 [2022-01-18 14:24:16,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:24:16,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:16,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2022-01-18 14:24:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:17,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823301991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:17,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:17,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-18 14:24:17,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249282060] [2022-01-18 14:24:17,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:17,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:24:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:24:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:24:17,271 INFO L87 Difference]: Start difference. First operand 119993 states and 508454 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:25,105 INFO L93 Difference]: Finished difference Result 191717 states and 793130 transitions. [2022-01-18 14:24:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 14:24:25,105 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:24:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:26,023 INFO L225 Difference]: With dead ends: 191717 [2022-01-18 14:24:26,023 INFO L226 Difference]: Without dead ends: 189244 [2022-01-18 14:24:26,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1074, Invalid=8628, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 14:24:26,024 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 880 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:26,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1582 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 14:24:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189244 states. [2022-01-18 14:24:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189244 to 120929. [2022-01-18 14:24:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120929 states, 120928 states have (on average 4.232956800740936) internal successors, (511883), 120928 states have internal predecessors, (511883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120929 states to 120929 states and 511883 transitions. [2022-01-18 14:24:32,115 INFO L78 Accepts]: Start accepts. Automaton has 120929 states and 511883 transitions. Word has length 33 [2022-01-18 14:24:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:32,115 INFO L470 AbstractCegarLoop]: Abstraction has 120929 states and 511883 transitions. [2022-01-18 14:24:32,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 120929 states and 511883 transitions. [2022-01-18 14:24:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:24:32,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:32,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:32,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:32,538 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:24:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash 768377782, now seen corresponding path program 10 times [2022-01-18 14:24:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971750864] [2022-01-18 14:24:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:32,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:32,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971750864] [2022-01-18 14:24:32,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971750864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366321135] [2022-01-18 14:24:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:32,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:32,682 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:32,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 14:24:32,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:32,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:24:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:33,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:33,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:33,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:24:33,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:33,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:24:33,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:33,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:24:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:33,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366321135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:33,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:33,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:24:33,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768304044] [2022-01-18 14:24:33,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:33,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:24:33,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:24:33,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:24:33,530 INFO L87 Difference]: Start difference. First operand 120929 states and 511883 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:36,859 INFO L93 Difference]: Finished difference Result 138250 states and 569664 transitions. [2022-01-18 14:24:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 14:24:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:24:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:38,020 INFO L225 Difference]: With dead ends: 138250 [2022-01-18 14:24:38,020 INFO L226 Difference]: Without dead ends: 137939 [2022-01-18 14:24:38,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=676, Invalid=3484, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 14:24:38,021 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 662 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:38,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 862 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1461 Invalid, 0 Unknown, 767 Unchecked, 1.1s Time] [2022-01-18 14:24:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137939 states. [2022-01-18 14:24:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137939 to 122572. [2022-01-18 14:24:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122572 states, 122571 states have (on average 4.226994966182866) internal successors, (518107), 122571 states have internal predecessors, (518107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122572 states to 122572 states and 518107 transitions. [2022-01-18 14:24:43,042 INFO L78 Accepts]: Start accepts. Automaton has 122572 states and 518107 transitions. Word has length 33 [2022-01-18 14:24:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:43,042 INFO L470 AbstractCegarLoop]: Abstraction has 122572 states and 518107 transitions. [2022-01-18 14:24:43,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 122572 states and 518107 transitions. [2022-01-18 14:24:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:24:43,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:43,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:43,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:43,469 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:24:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 146497372, now seen corresponding path program 11 times [2022-01-18 14:24:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:43,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282824720] [2022-01-18 14:24:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:43,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:43,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282824720] [2022-01-18 14:24:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282824720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266936691] [2022-01-18 14:24:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:43,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:43,611 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 14:24:43,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:24:43,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:24:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:44,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:44,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:44,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:24:44,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:44,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:24:44,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:44,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:24:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266936691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:44,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:44,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:24:44,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812140238] [2022-01-18 14:24:44,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:44,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:24:44,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:24:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:24:44,519 INFO L87 Difference]: Start difference. First operand 122572 states and 518107 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:48,289 INFO L93 Difference]: Finished difference Result 142469 states and 583741 transitions. [2022-01-18 14:24:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 14:24:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:24:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:49,050 INFO L225 Difference]: With dead ends: 142469 [2022-01-18 14:24:49,050 INFO L226 Difference]: Without dead ends: 137307 [2022-01-18 14:24:49,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3697, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 14:24:49,051 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 789 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:49,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 892 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1767 Invalid, 0 Unknown, 1459 Unchecked, 0.7s Time] [2022-01-18 14:24:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137307 states. [2022-01-18 14:24:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137307 to 122047. [2022-01-18 14:24:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122047 states, 122046 states have (on average 4.225283909345657) internal successors, (515679), 122046 states have internal predecessors, (515679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122047 states to 122047 states and 515679 transitions. [2022-01-18 14:24:54,133 INFO L78 Accepts]: Start accepts. Automaton has 122047 states and 515679 transitions. Word has length 33 [2022-01-18 14:24:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:54,133 INFO L470 AbstractCegarLoop]: Abstraction has 122047 states and 515679 transitions. [2022-01-18 14:24:54,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 122047 states and 515679 transitions. [2022-01-18 14:24:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:24:54,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:54,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:54,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:54,566 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,SelfDestructingSolverStorable83 [2022-01-18 14:24:54,567 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:24:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 807748098, now seen corresponding path program 12 times [2022-01-18 14:24:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262092235] [2022-01-18 14:24:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:54,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:54,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262092235] [2022-01-18 14:24:54,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262092235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:54,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364697603] [2022-01-18 14:24:54,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:54,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:54,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:54,694 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:54,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 14:24:54,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:24:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:24:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:55,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:55,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:55,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:24:56,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:56,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:24:56,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:24:56,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:24:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:56,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364697603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:56,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:56,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:24:56,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124763453] [2022-01-18 14:24:56,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:56,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:24:56,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:24:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:24:56,154 INFO L87 Difference]: Start difference. First operand 122047 states and 515679 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:59,395 INFO L93 Difference]: Finished difference Result 137702 states and 565960 transitions. [2022-01-18 14:24:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 14:24:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:24:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:00,073 INFO L225 Difference]: With dead ends: 137702 [2022-01-18 14:25:00,073 INFO L226 Difference]: Without dead ends: 135594 [2022-01-18 14:25:00,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=679, Invalid=3611, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 14:25:00,073 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 725 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1652 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:00,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1040 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1785 Invalid, 0 Unknown, 1652 Unchecked, 0.7s Time] [2022-01-18 14:25:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135594 states. [2022-01-18 14:25:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135594 to 121168. [2022-01-18 14:25:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121168 states, 121167 states have (on average 4.229055766008897) internal successors, (512422), 121167 states have internal predecessors, (512422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121168 states to 121168 states and 512422 transitions. [2022-01-18 14:25:04,984 INFO L78 Accepts]: Start accepts. Automaton has 121168 states and 512422 transitions. Word has length 33 [2022-01-18 14:25:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:04,984 INFO L470 AbstractCegarLoop]: Abstraction has 121168 states and 512422 transitions. [2022-01-18 14:25:04,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 121168 states and 512422 transitions. [2022-01-18 14:25:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:25:05,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:05,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:05,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:05,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:05,412 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:25:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 661686196, now seen corresponding path program 6 times [2022-01-18 14:25:05,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:05,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087039412] [2022-01-18 14:25:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:05,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:05,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087039412] [2022-01-18 14:25:05,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087039412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251699992] [2022-01-18 14:25:05,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:25:05,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:05,537 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:05,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 14:25:05,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:25:05,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 14:25:05,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:25:06,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:25:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:06,977 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 14:25:06,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2022-01-18 14:25:07,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:07,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 14:25:07,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:07,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 14:25:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251699992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:07,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:07,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 28 [2022-01-18 14:25:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450238090] [2022-01-18 14:25:07,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:25:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:25:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:25:07,354 INFO L87 Difference]: Start difference. First operand 121168 states and 512422 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:13,999 INFO L93 Difference]: Finished difference Result 196089 states and 798153 transitions. [2022-01-18 14:25:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-18 14:25:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:25:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:15,568 INFO L225 Difference]: With dead ends: 196089 [2022-01-18 14:25:15,568 INFO L226 Difference]: Without dead ends: 195645 [2022-01-18 14:25:15,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1924, Invalid=14332, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 14:25:15,569 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 783 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3626 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1998 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:15,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1388 Invalid, 5704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3626 Invalid, 0 Unknown, 1998 Unchecked, 1.7s Time] [2022-01-18 14:25:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195645 states. [2022-01-18 14:25:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195645 to 130884. [2022-01-18 14:25:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130884 states, 130883 states have (on average 4.198581939594906) internal successors, (549523), 130883 states have internal predecessors, (549523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130884 states to 130884 states and 549523 transitions. [2022-01-18 14:25:22,337 INFO L78 Accepts]: Start accepts. Automaton has 130884 states and 549523 transitions. Word has length 33 [2022-01-18 14:25:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 130884 states and 549523 transitions. [2022-01-18 14:25:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 130884 states and 549523 transitions. [2022-01-18 14:25:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:25:22,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:22,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:22,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:22,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:22,844 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:25:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -268128946, now seen corresponding path program 7 times [2022-01-18 14:25:22,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359432093] [2022-01-18 14:25:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:22,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:22,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359432093] [2022-01-18 14:25:22,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359432093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068649249] [2022-01-18 14:25:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:22,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:22,999 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:23,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 14:25:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:25:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:23,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:25:23,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:25:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:23,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:23,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:23,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:25:23,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:23,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:25:23,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:23,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:25:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:23,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068649249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:23,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:23,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-01-18 14:25:23,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856018635] [2022-01-18 14:25:23,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:23,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:25:23,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:25:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:25:23,375 INFO L87 Difference]: Start difference. First operand 130884 states and 549523 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:26,295 INFO L93 Difference]: Finished difference Result 161447 states and 659679 transitions. [2022-01-18 14:25:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:25:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:25:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:27,073 INFO L225 Difference]: With dead ends: 161447 [2022-01-18 14:25:27,073 INFO L226 Difference]: Without dead ends: 160415 [2022-01-18 14:25:27,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 14:25:27,073 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 275 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:27,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 986 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2172 Invalid, 0 Unknown, 321 Unchecked, 0.8s Time] [2022-01-18 14:25:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160415 states. [2022-01-18 14:25:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160415 to 127826. [2022-01-18 14:25:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127826 states, 127825 states have (on average 4.220496772931742) internal successors, (539485), 127825 states have internal predecessors, (539485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127826 states to 127826 states and 539485 transitions. [2022-01-18 14:25:33,814 INFO L78 Accepts]: Start accepts. Automaton has 127826 states and 539485 transitions. Word has length 33 [2022-01-18 14:25:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:33,814 INFO L470 AbstractCegarLoop]: Abstraction has 127826 states and 539485 transitions. [2022-01-18 14:25:33,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 127826 states and 539485 transitions. [2022-01-18 14:25:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:25:34,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:34,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:34,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:34,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:34,272 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:25:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 460643736, now seen corresponding path program 13 times [2022-01-18 14:25:34,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:34,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723899718] [2022-01-18 14:25:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:34,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:34,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723899718] [2022-01-18 14:25:34,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723899718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197353407] [2022-01-18 14:25:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:34,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:34,426 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:34,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 14:25:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:25:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:34,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:35,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:35,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:25:35,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:35,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:25:35,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:35,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:25:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:35,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197353407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:35,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:35,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 14:25:35,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473799285] [2022-01-18 14:25:35,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:35,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:25:35,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:25:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:25:35,432 INFO L87 Difference]: Start difference. First operand 127826 states and 539485 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:39,280 INFO L93 Difference]: Finished difference Result 148843 states and 607252 transitions. [2022-01-18 14:25:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 14:25:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:25:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:40,535 INFO L225 Difference]: With dead ends: 148843 [2022-01-18 14:25:40,535 INFO L226 Difference]: Without dead ends: 146095 [2022-01-18 14:25:40,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=967, Invalid=4733, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 14:25:40,536 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 899 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2739 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:40,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 979 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1709 Invalid, 0 Unknown, 2739 Unchecked, 0.7s Time] [2022-01-18 14:25:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146095 states. [2022-01-18 14:25:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146095 to 127965. [2022-01-18 14:25:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127965 states, 127964 states have (on average 4.218639617392392) internal successors, (539834), 127964 states have internal predecessors, (539834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127965 states to 127965 states and 539834 transitions. [2022-01-18 14:25:45,950 INFO L78 Accepts]: Start accepts. Automaton has 127965 states and 539834 transitions. Word has length 33 [2022-01-18 14:25:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:45,950 INFO L470 AbstractCegarLoop]: Abstraction has 127965 states and 539834 transitions. [2022-01-18 14:25:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 127965 states and 539834 transitions. [2022-01-18 14:25:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:25:46,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:46,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:46,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:46,403 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,SelfDestructingSolverStorable87 [2022-01-18 14:25:46,403 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:25:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 824311120, now seen corresponding path program 14 times [2022-01-18 14:25:46,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:46,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086976984] [2022-01-18 14:25:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:46,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:46,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086976984] [2022-01-18 14:25:46,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086976984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337262626] [2022-01-18 14:25:46,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:46,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:46,590 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:46,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 14:25:46,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:25:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:47,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:47,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:47,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:25:48,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:48,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 14:25:48,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:48,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:25:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337262626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:48,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:48,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-01-18 14:25:48,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303490195] [2022-01-18 14:25:48,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:48,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:25:48,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:25:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:25:48,269 INFO L87 Difference]: Start difference. First operand 127965 states and 539834 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:51,638 INFO L93 Difference]: Finished difference Result 141886 states and 584113 transitions. [2022-01-18 14:25:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 14:25:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:25:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:52,305 INFO L225 Difference]: With dead ends: 141886 [2022-01-18 14:25:52,305 INFO L226 Difference]: Without dead ends: 140493 [2022-01-18 14:25:52,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 14:25:52,306 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 714 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:52,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 863 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2206 Invalid, 0 Unknown, 517 Unchecked, 0.9s Time] [2022-01-18 14:25:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140493 states. [2022-01-18 14:25:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140493 to 127462. [2022-01-18 14:25:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127462 states, 127461 states have (on average 4.221479511379951) internal successors, (538074), 127461 states have internal predecessors, (538074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127462 states to 127462 states and 538074 transitions. [2022-01-18 14:25:57,995 INFO L78 Accepts]: Start accepts. Automaton has 127462 states and 538074 transitions. Word has length 33 [2022-01-18 14:25:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:57,995 INFO L470 AbstractCegarLoop]: Abstraction has 127462 states and 538074 transitions. [2022-01-18 14:25:57,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 127462 states and 538074 transitions. [2022-01-18 14:25:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:25:58,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:58,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:58,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 14:25:58,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 14:25:58,523 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:25:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1989825946, now seen corresponding path program 7 times [2022-01-18 14:25:58,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606361696] [2022-01-18 14:25:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:58,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:58,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606361696] [2022-01-18 14:25:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606361696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128458096] [2022-01-18 14:25:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:58,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:58,682 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 14:25:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:25:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:58,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 14:25:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:58,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:58,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:58,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 14:25:59,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:59,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:25:59,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:25:59,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:25:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128458096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:59,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:59,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 14:25:59,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775947473] [2022-01-18 14:25:59,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:59,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:25:59,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:25:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:25:59,110 INFO L87 Difference]: Start difference. First operand 127462 states and 538074 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2022-01-18 14:26:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:01,566 INFO L93 Difference]: Finished difference Result 139085 states and 574951 transitions. [2022-01-18 14:26:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:26:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 33 [2022-01-18 14:26:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:02,208 INFO L225 Difference]: With dead ends: 139085 [2022-01-18 14:26:02,209 INFO L226 Difference]: Without dead ends: 138723 [2022-01-18 14:26:02,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:26:02,209 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 333 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:02,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 921 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138723 states. [2022-01-18 14:26:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138723 to 128062. [2022-01-18 14:26:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128062 states, 128061 states have (on average 4.217638469167038) internal successors, (540115), 128061 states have internal predecessors, (540115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128062 states to 128062 states and 540115 transitions. [2022-01-18 14:26:07,181 INFO L78 Accepts]: Start accepts. Automaton has 128062 states and 540115 transitions. Word has length 33 [2022-01-18 14:26:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:07,181 INFO L470 AbstractCegarLoop]: Abstraction has 128062 states and 540115 transitions. [2022-01-18 14:26:07,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2022-01-18 14:26:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 128062 states and 540115 transitions. [2022-01-18 14:26:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:26:08,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:08,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:08,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:08,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 14:26:08,360 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:26:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -165930146, now seen corresponding path program 8 times [2022-01-18 14:26:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:08,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919346858] [2022-01-18 14:26:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:08,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919346858] [2022-01-18 14:26:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919346858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276710017] [2022-01-18 14:26:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:08,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:08,536 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:08,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 14:26:08,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:26:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:08,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:26:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:08,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:08,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:08,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 14:26:08,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:08,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:26:08,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:08,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 14:26:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276710017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:08,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 14:26:08,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877554869] [2022-01-18 14:26:08,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:08,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:26:08,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:26:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:26:08,931 INFO L87 Difference]: Start difference. First operand 128062 states and 540115 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:11,701 INFO L93 Difference]: Finished difference Result 141288 states and 583034 transitions. [2022-01-18 14:26:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:26:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:26:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:12,396 INFO L225 Difference]: With dead ends: 141288 [2022-01-18 14:26:12,396 INFO L226 Difference]: Without dead ends: 141078 [2022-01-18 14:26:12,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:26:12,397 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 382 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:12,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 978 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:26:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141078 states. [2022-01-18 14:26:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141078 to 128065. [2022-01-18 14:26:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128065 states, 128064 states have (on average 4.217945714642679) internal successors, (540167), 128064 states have internal predecessors, (540167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128065 states to 128065 states and 540167 transitions. [2022-01-18 14:26:18,138 INFO L78 Accepts]: Start accepts. Automaton has 128065 states and 540167 transitions. Word has length 33 [2022-01-18 14:26:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:18,138 INFO L470 AbstractCegarLoop]: Abstraction has 128065 states and 540167 transitions. [2022-01-18 14:26:18,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 128065 states and 540167 transitions. [2022-01-18 14:26:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:26:18,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:18,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:18,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:18,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:18,710 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:26:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2057617790, now seen corresponding path program 5 times [2022-01-18 14:26:18,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:18,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569700740] [2022-01-18 14:26:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:18,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:18,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:18,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569700740] [2022-01-18 14:26:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569700740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:18,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954173703] [2022-01-18 14:26:18,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:26:18,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:18,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:18,949 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 14:26:18,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:26:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:26:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:19,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:19,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 14:26:19,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:19,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 14:26:19,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:19,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 14:26:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:19,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954173703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:19,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:19,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 14:26:19,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860406297] [2022-01-18 14:26:19,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:19,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:26:19,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:26:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:26:19,981 INFO L87 Difference]: Start difference. First operand 128065 states and 540167 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:22,339 INFO L93 Difference]: Finished difference Result 133414 states and 556585 transitions. [2022-01-18 14:26:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:26:22,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:26:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:22,976 INFO L225 Difference]: With dead ends: 133414 [2022-01-18 14:26:22,977 INFO L226 Difference]: Without dead ends: 132561 [2022-01-18 14:26:22,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:26:22,977 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 454 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:22,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 646 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132561 states. [2022-01-18 14:26:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132561 to 127886. [2022-01-18 14:26:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127886 states, 127885 states have (on average 4.217922352113226) internal successors, (539409), 127885 states have internal predecessors, (539409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127886 states to 127886 states and 539409 transitions. [2022-01-18 14:26:27,733 INFO L78 Accepts]: Start accepts. Automaton has 127886 states and 539409 transitions. Word has length 33 [2022-01-18 14:26:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:27,733 INFO L470 AbstractCegarLoop]: Abstraction has 127886 states and 539409 transitions. [2022-01-18 14:26:27,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 127886 states and 539409 transitions. [2022-01-18 14:26:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:26:27,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:27,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:27,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:28,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:28,158 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:26:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1353221066, now seen corresponding path program 15 times [2022-01-18 14:26:28,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102673795] [2022-01-18 14:26:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:28,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:28,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102673795] [2022-01-18 14:26:28,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102673795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609786581] [2022-01-18 14:26:28,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:26:28,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:28,308 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:28,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 14:26:28,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:26:28,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:26:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:29,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:29,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 14:26:29,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:29,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:26:29,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:26:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:29,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609786581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:29,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:29,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 14:26:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150757202] [2022-01-18 14:26:29,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:29,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:26:29,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:26:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:26:29,848 INFO L87 Difference]: Start difference. First operand 127886 states and 539409 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:32,290 INFO L93 Difference]: Finished difference Result 138811 states and 575714 transitions. [2022-01-18 14:26:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:26:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:26:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:32,960 INFO L225 Difference]: With dead ends: 138811 [2022-01-18 14:26:32,961 INFO L226 Difference]: Without dead ends: 138442 [2022-01-18 14:26:32,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 14:26:32,961 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 322 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:32,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 786 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1295 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-01-18 14:26:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138442 states. [2022-01-18 14:26:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138442 to 128861. [2022-01-18 14:26:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128861 states, 128860 states have (on average 4.214604997671892) internal successors, (543094), 128860 states have internal predecessors, (543094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128861 states to 128861 states and 543094 transitions. [2022-01-18 14:26:38,039 INFO L78 Accepts]: Start accepts. Automaton has 128861 states and 543094 transitions. Word has length 33 [2022-01-18 14:26:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:38,039 INFO L470 AbstractCegarLoop]: Abstraction has 128861 states and 543094 transitions. [2022-01-18 14:26:38,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 128861 states and 543094 transitions. [2022-01-18 14:26:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:26:38,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:38,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:38,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:38,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:38,466 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:26:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:38,466 INFO L85 PathProgramCache]: Analyzing trace with hash 461008036, now seen corresponding path program 16 times [2022-01-18 14:26:38,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:38,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584068079] [2022-01-18 14:26:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:38,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584068079] [2022-01-18 14:26:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584068079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411263020] [2022-01-18 14:26:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:26:38,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:38,629 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:38,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 14:26:38,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:26:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:26:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:39,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:39,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:39,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 14:26:39,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:39,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 14:26:39,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:39,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:26:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411263020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:40,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:40,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 14:26:40,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793397374] [2022-01-18 14:26:40,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:40,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:26:40,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:26:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:26:40,049 INFO L87 Difference]: Start difference. First operand 128861 states and 543094 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:43,294 INFO L93 Difference]: Finished difference Result 157766 states and 647507 transitions. [2022-01-18 14:26:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 14:26:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:26:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:44,141 INFO L225 Difference]: With dead ends: 157766 [2022-01-18 14:26:44,141 INFO L226 Difference]: Without dead ends: 155791 [2022-01-18 14:26:44,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 14:26:44,142 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 515 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:44,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 978 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2380 Invalid, 0 Unknown, 515 Unchecked, 0.9s Time] [2022-01-18 14:26:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155791 states. [2022-01-18 14:26:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155791 to 127719. [2022-01-18 14:26:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127719 states, 127718 states have (on average 4.217079816470662) internal successors, (538597), 127718 states have internal predecessors, (538597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127719 states to 127719 states and 538597 transitions. [2022-01-18 14:26:49,859 INFO L78 Accepts]: Start accepts. Automaton has 127719 states and 538597 transitions. Word has length 33 [2022-01-18 14:26:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:49,859 INFO L470 AbstractCegarLoop]: Abstraction has 127719 states and 538597 transitions. [2022-01-18 14:26:49,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 127719 states and 538597 transitions. [2022-01-18 14:26:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:26:50,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:50,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:50,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 14:26:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:50,399 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:26:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1058243580, now seen corresponding path program 8 times [2022-01-18 14:26:50,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:50,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661742527] [2022-01-18 14:26:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:50,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:50,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661742527] [2022-01-18 14:26:50,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661742527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793928396] [2022-01-18 14:26:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:50,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:50,533 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:50,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 14:26:50,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:26:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:50,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:26:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:50,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:50,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 24 [2022-01-18 14:26:50,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:50,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:26:50,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:26:50,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:26:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:26:50,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793928396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:50,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:50,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:26:50,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354976776] [2022-01-18 14:26:50,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:26:50,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:26:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:26:50,905 INFO L87 Difference]: Start difference. First operand 127719 states and 538597 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:53,900 INFO L93 Difference]: Finished difference Result 156407 states and 642294 transitions. [2022-01-18 14:26:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:26:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:26:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:54,984 INFO L225 Difference]: With dead ends: 156407 [2022-01-18 14:26:54,984 INFO L226 Difference]: Without dead ends: 155732 [2022-01-18 14:26:54,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 14:26:54,984 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 277 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:54,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 965 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155732 states. [2022-01-18 14:26:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155732 to 127513. [2022-01-18 14:26:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127513 states, 127512 states have (on average 4.217752054708576) internal successors, (537814), 127512 states have internal predecessors, (537814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127513 states to 127513 states and 537814 transitions. [2022-01-18 14:27:00,605 INFO L78 Accepts]: Start accepts. Automaton has 127513 states and 537814 transitions. Word has length 33 [2022-01-18 14:27:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:00,605 INFO L470 AbstractCegarLoop]: Abstraction has 127513 states and 537814 transitions. [2022-01-18 14:27:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 127513 states and 537814 transitions. [2022-01-18 14:27:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:27:00,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:00,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:01,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:01,121 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:27:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1067294788, now seen corresponding path program 9 times [2022-01-18 14:27:01,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:01,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151656114] [2022-01-18 14:27:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:01,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:01,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151656114] [2022-01-18 14:27:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151656114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841840883] [2022-01-18 14:27:01,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:01,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:01,209 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:01,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 14:27:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:27:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:27:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:01,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:27:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:01,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:02,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:02,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:27:02,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:02,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 14:27:02,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:02,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 68 [2022-01-18 14:27:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841840883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:03,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:03,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-01-18 14:27:03,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567847925] [2022-01-18 14:27:03,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:03,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 14:27:03,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 14:27:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:27:03,295 INFO L87 Difference]: Start difference. First operand 127513 states and 537814 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:36,387 INFO L93 Difference]: Finished difference Result 393166 states and 1586517 transitions. [2022-01-18 14:27:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2022-01-18 14:27:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:27:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:38,769 INFO L225 Difference]: With dead ends: 393166 [2022-01-18 14:27:38,769 INFO L226 Difference]: Without dead ends: 392969 [2022-01-18 14:27:38,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54769 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=14554, Invalid=111116, Unknown=0, NotChecked=0, Total=125670 [2022-01-18 14:27:38,773 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1598 mSDsluCounter, 6888 mSDsCounter, 0 mSdLazyCounter, 7935 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 17960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 7935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9892 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:38,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 4082 Invalid, 17960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 7935 Invalid, 0 Unknown, 9892 Unchecked, 4.1s Time] [2022-01-18 14:27:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392969 states. [2022-01-18 14:27:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392969 to 147722. [2022-01-18 14:27:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147722 states, 147721 states have (on average 4.259489172155618) internal successors, (629216), 147721 states have internal predecessors, (629216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147722 states to 147722 states and 629216 transitions. [2022-01-18 14:27:50,548 INFO L78 Accepts]: Start accepts. Automaton has 147722 states and 629216 transitions. Word has length 33 [2022-01-18 14:27:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:50,548 INFO L470 AbstractCegarLoop]: Abstraction has 147722 states and 629216 transitions. [2022-01-18 14:27:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 147722 states and 629216 transitions. [2022-01-18 14:27:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:27:50,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:50,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:50,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 14:27:51,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:51,045 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:27:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash 284439802, now seen corresponding path program 10 times [2022-01-18 14:27:51,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:51,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932133801] [2022-01-18 14:27:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:51,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:51,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932133801] [2022-01-18 14:27:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932133801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031603550] [2022-01-18 14:27:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:51,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:51,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:51,150 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:51,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 14:27:51,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:51,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:27:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:51,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 14:27:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:51,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:51,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:27:51,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:51,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:27:51,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:27:51,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:27:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:51,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031603550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:51,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:51,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 14:27:51,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771138426] [2022-01-18 14:27:51,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:51,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:27:51,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:27:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:27:51,499 INFO L87 Difference]: Start difference. First operand 147722 states and 629216 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:54,297 INFO L93 Difference]: Finished difference Result 159194 states and 665599 transitions. [2022-01-18 14:27:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:27:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:27:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:55,522 INFO L225 Difference]: With dead ends: 159194 [2022-01-18 14:27:55,522 INFO L226 Difference]: Without dead ends: 158619 [2022-01-18 14:27:55,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:27:55,523 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 334 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:55,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 933 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:27:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158619 states. [2022-01-18 14:28:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158619 to 146459. [2022-01-18 14:28:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146459 states, 146458 states have (on average 4.267796911059826) internal successors, (625053), 146458 states have internal predecessors, (625053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146459 states to 146459 states and 625053 transitions. [2022-01-18 14:28:01,857 INFO L78 Accepts]: Start accepts. Automaton has 146459 states and 625053 transitions. Word has length 33 [2022-01-18 14:28:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:01,857 INFO L470 AbstractCegarLoop]: Abstraction has 146459 states and 625053 transitions. [2022-01-18 14:28:01,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 146459 states and 625053 transitions. [2022-01-18 14:28:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:28:02,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:02,163 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, 1, 1, 1] [2022-01-18 14:28:02,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:02,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 14:28:02,363 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:28:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1428166344, now seen corresponding path program 11 times [2022-01-18 14:28:02,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:02,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488488042] [2022-01-18 14:28:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:02,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:02,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488488042] [2022-01-18 14:28:02,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488488042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538662088] [2022-01-18 14:28:02,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:28:02,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:02,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:02,477 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:02,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 14:28:02,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:28:02,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:28:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:02,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:28:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:02,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:02,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:02,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:28:02,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:02,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:02,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:02,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538662088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:02,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:28:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991328400] [2022-01-18 14:28:02,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:02,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:28:02,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:28:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:28:02,915 INFO L87 Difference]: Start difference. First operand 146459 states and 625053 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:05,536 INFO L93 Difference]: Finished difference Result 159231 states and 668684 transitions. [2022-01-18 14:28:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:28:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:28:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:06,381 INFO L225 Difference]: With dead ends: 159231 [2022-01-18 14:28:06,381 INFO L226 Difference]: Without dead ends: 159231 [2022-01-18 14:28:06,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:28:06,382 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 443 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:06,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 821 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:28:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159231 states. [2022-01-18 14:28:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159231 to 147041. [2022-01-18 14:28:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147041 states, 147040 states have (on average 4.266145266594124) internal successors, (627294), 147040 states have internal predecessors, (627294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147041 states to 147041 states and 627294 transitions. [2022-01-18 14:28:12,546 INFO L78 Accepts]: Start accepts. Automaton has 147041 states and 627294 transitions. Word has length 33 [2022-01-18 14:28:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:12,546 INFO L470 AbstractCegarLoop]: Abstraction has 147041 states and 627294 transitions. [2022-01-18 14:28:12,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 147041 states and 627294 transitions. [2022-01-18 14:28:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:28:13,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:13,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:13,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 14:28:13,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 14:28:13,779 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:28:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1783853826, now seen corresponding path program 9 times [2022-01-18 14:28:13,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:13,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655217941] [2022-01-18 14:28:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:13,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:13,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655217941] [2022-01-18 14:28:13,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655217941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590226306] [2022-01-18 14:28:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:28:13,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:13,878 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 14:28:13,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:28:13,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:28:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:14,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 14:28:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:14,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:14,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:28:14,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:14,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:14,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:14,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:14,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590226306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:14,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:14,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 14:28:14,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831163967] [2022-01-18 14:28:14,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:14,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:28:14,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:28:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:28:14,257 INFO L87 Difference]: Start difference. First operand 147041 states and 627294 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:16,845 INFO L93 Difference]: Finished difference Result 164681 states and 684514 transitions. [2022-01-18 14:28:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:28:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:28:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:17,697 INFO L225 Difference]: With dead ends: 164681 [2022-01-18 14:28:17,698 INFO L226 Difference]: Without dead ends: 164165 [2022-01-18 14:28:17,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:28:17,698 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 453 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:17,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 788 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:28:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164165 states. [2022-01-18 14:28:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164165 to 146174. [2022-01-18 14:28:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146174 states, 146173 states have (on average 4.270453503725038) internal successors, (624225), 146173 states have internal predecessors, (624225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146174 states to 146174 states and 624225 transitions. [2022-01-18 14:28:24,023 INFO L78 Accepts]: Start accepts. Automaton has 146174 states and 624225 transitions. Word has length 33 [2022-01-18 14:28:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 146174 states and 624225 transitions. [2022-01-18 14:28:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 146174 states and 624225 transitions. [2022-01-18 14:28:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:28:24,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:24,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:24,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:24,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 14:28:24,493 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:28:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash -472347488, now seen corresponding path program 10 times [2022-01-18 14:28:24,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:24,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36010157] [2022-01-18 14:28:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:24,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:24,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:24,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36010157] [2022-01-18 14:28:24,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36010157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:24,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571631252] [2022-01-18 14:28:24,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:28:24,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:24,622 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:24,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 14:28:24,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:28:24,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:28:24,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:24,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:28:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:24,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:24,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:24,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:28:24,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:24,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:24,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:24,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 14:28:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:24,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571631252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:24,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:24,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 14:28:24,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465057557] [2022-01-18 14:28:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:24,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:28:24,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:28:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:28:24,991 INFO L87 Difference]: Start difference. First operand 146174 states and 624225 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:28,555 INFO L93 Difference]: Finished difference Result 169413 states and 705268 transitions. [2022-01-18 14:28:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:28:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:28:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:29,465 INFO L225 Difference]: With dead ends: 169413 [2022-01-18 14:28:29,465 INFO L226 Difference]: Without dead ends: 168733 [2022-01-18 14:28:29,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:28:29,466 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 355 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:29,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1121 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 14:28:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168733 states. [2022-01-18 14:28:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168733 to 145082. [2022-01-18 14:28:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145082 states, 145081 states have (on average 4.268374218539988) internal successors, (619260), 145081 states have internal predecessors, (619260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145082 states to 145082 states and 619260 transitions. [2022-01-18 14:28:35,884 INFO L78 Accepts]: Start accepts. Automaton has 145082 states and 619260 transitions. Word has length 33 [2022-01-18 14:28:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:35,884 INFO L470 AbstractCegarLoop]: Abstraction has 145082 states and 619260 transitions. [2022-01-18 14:28:35,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 145082 states and 619260 transitions. [2022-01-18 14:28:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:28:36,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:36,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:36,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:36,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:36,368 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 14:28:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -805336814, now seen corresponding path program 12 times [2022-01-18 14:28:36,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702597563] [2022-01-18 14:28:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:36,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:36,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702597563] [2022-01-18 14:28:36,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702597563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789637025] [2022-01-18 14:28:36,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:28:36,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:36,486 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:36,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 14:28:36,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:28:36,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:36,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:28:36,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:36,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 14:28:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:36,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:36,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:36,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 14:28:36,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:36,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:28:36,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:28:36,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-01-18 14:28:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:36,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789637025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:36,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:36,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-18 14:28:36,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140747405] [2022-01-18 14:28:36,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:36,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:28:36,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:28:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:28:36,839 INFO L87 Difference]: Start difference. First operand 145082 states and 619260 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:39,424 INFO L93 Difference]: Finished difference Result 155615 states and 655049 transitions. [2022-01-18 14:28:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:28:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 14:28:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:40,165 INFO L225 Difference]: With dead ends: 155615 [2022-01-18 14:28:40,165 INFO L226 Difference]: Without dead ends: 155615 [2022-01-18 14:28:40,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:28:40,165 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 401 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:40,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 689 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:28:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155615 states. Received shutdown request... [2022-01-18 14:28:42,438 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 14:28:42,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:42,474 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:28:42,474 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:28:42,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:42,661 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 14:28:42,663 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 14:28:42,663 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 14:28:42,663 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 14:28:42,666 INFO L732 BasicCegarLoop]: Path program histogram: [25, 16, 12, 10, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:42,667 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:28:42,667 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:28:42,674 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:28:42 BasicIcfg [2022-01-18 14:28:42,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:28:42,675 INFO L158 Benchmark]: Toolchain (without parser) took 666885.98ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 337.6MB in the beginning and 13.8GB in the end (delta: -13.5GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2022-01-18 14:28:42,675 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 375.4MB. Free memory is still 338.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:28:42,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.45ms. Allocated memory is still 375.4MB. Free memory was 337.6MB in the beginning and 336.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 14:28:42,683 INFO L158 Benchmark]: Boogie Preprocessor took 14.87ms. Allocated memory is still 375.4MB. Free memory was 336.0MB in the beginning and 335.1MB in the end (delta: 929.7kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:28:42,683 INFO L158 Benchmark]: RCFGBuilder took 256.29ms. Allocated memory is still 375.4MB. Free memory was 335.1MB in the beginning and 325.3MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 14:28:42,683 INFO L158 Benchmark]: TraceAbstraction took 666586.31ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.8MB in the beginning and 13.8GB in the end (delta: -13.5GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2022-01-18 14:28:42,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 375.4MB. Free memory is still 338.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.45ms. Allocated memory is still 375.4MB. Free memory was 337.6MB in the beginning and 336.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.87ms. Allocated memory is still 375.4MB. Free memory was 336.0MB in the beginning and 335.1MB in the end (delta: 929.7kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 256.29ms. Allocated memory is still 375.4MB. Free memory was 335.1MB in the beginning and 325.3MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 666586.31ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.8MB in the beginning and 13.8GB in the end (delta: -13.5GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 666.4s, OverallIterations: 101, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 16.6s, AutomataDifference: 294.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44372 SdHoareTripleChecker+Valid, 72.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44372 mSDsluCounter, 69502 SdHoareTripleChecker+Invalid, 59.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28633 IncrementalHoareTripleChecker+Unchecked, 96341 mSDsCounter, 4022 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 169475 IncrementalHoareTripleChecker+Invalid, 202130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4022 mSolverCounterUnsat, 6639 mSDtfsCounter, 169475 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9213 GetRequests, 4420 SyntacticMatches, 288 SemanticMatches, 4505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226549 ImplicationChecksByTransitivity, 119.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147722occurred in iteration=96, InterpolantAutomatonStates: 3976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 259.5s AutomataMinimizationTime, 101 MinimizatonAttempts, 1588063 StatesRemovedByMinimization, 98 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 72.8s InterpolantComputationTime, 5667 NumberOfCodeBlocks, 5652 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 8098 ConstructedInterpolants, 385 QuantifiedInterpolants, 126318 SizeOfPredicates, 963 NumberOfNonLiveVariables, 7185 ConjunctsInSsa, 1350 ConjunctsInUnsatCore, 284 InterpolantComputations, 10 PerfectInterpolantSequences, 599/2852 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 [2022-01-18 14:28:42,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 !SESSION 2022-01-18 14:17:33.372 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.12 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2022-01-18 14:28:42.940 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d43e4943/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d43e4943/.metadata/.log.