/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:06:10,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:06:10,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:06:10,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:06:10,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:06:10,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:06:10,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:06:10,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:06:10,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:06:10,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:06:10,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:06:10,781 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:06:10,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:06:10,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:06:10,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:06:10,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:06:10,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:06:10,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:06:10,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:06:10,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:06:10,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:06:10,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:06:10,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:06:10,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:06:10,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:06:10,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:06:11,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:06:11,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:06:11,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:06:11,110 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:06:11,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:06:11,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-08-21 12:06:11,112 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-08-21 12:06:11,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:06:11,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:06:11,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:06:11,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:06:11,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:06:11,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:06:11,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:06:11,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:06:11,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:06:11,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:06:11,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:06:11,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:06:11,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:06:11,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/1) ... [2021-08-21 12:06:11,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:06:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:11,287 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) [2021-08-21 12:06:11,289 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 [2021-08-21 12:06:11,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:06:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:06:11,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:06:11,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:06:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:06:11,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:06:11,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:06:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:06:11,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:06:11,326 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:06:11,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:06:11,607 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 12:06:11,607 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:06:11,609 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:06:11 BoogieIcfgContainer [2021-08-21 12:06:11,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:06:11,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:06:11,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:06:11,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:06:11,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:06:11" (1/2) ... [2021-08-21 12:06:11,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4662437e and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:06:11, skipping insertion in model container [2021-08-21 12:06:11,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:06:11" (2/2) ... [2021-08-21 12:06:11,614 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-08-21 12:06:11,618 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:06:11,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:06:11,618 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:06:11,619 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:06:11,656 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:06:11,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:06:11,733 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, mConcurrency=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 [2021-08-21 12:06:11,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:06:11,758 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-08-21 12:06:11,773 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2021-08-21 12:06:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2021-08-21 12:06:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:06:11,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:11,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:11,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 717728653, now seen corresponding path program 1 times [2021-08-21 12:06:11,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:11,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770335302] [2021-08-21 12:06:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:11,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:12,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:12,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770335302] [2021-08-21 12:06:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770335302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:06:12,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:06:12,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:06:12,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100688011] [2021-08-21 12:06:12,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:06:12,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:06:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:06:12,050 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:12,086 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-08-21 12:06:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:06:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:06:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:12,094 INFO L225 Difference]: With dead ends: 26 [2021-08-21 12:06:12,094 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 12:06:12,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:06:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 12:06:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 12:06:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-08-21 12:06:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-08-21 12:06:12,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-08-21 12:06:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:12,119 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-08-21 12:06:12,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-08-21 12:06:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:06:12,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:12,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:12,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:06:12,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1947075123, now seen corresponding path program 2 times [2021-08-21 12:06:12,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:12,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752372787] [2021-08-21 12:06:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:12,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:12,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:12,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752372787] [2021-08-21 12:06:12,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752372787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:06:12,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:06:12,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:06:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024786948] [2021-08-21 12:06:12,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:06:12,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:06:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:06:12,196 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:12,220 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-08-21 12:06:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:06:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:06:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:12,221 INFO L225 Difference]: With dead ends: 28 [2021-08-21 12:06:12,221 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 12:06:12,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:06:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 12:06:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-21 12:06:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-21 12:06:12,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-21 12:06:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:12,226 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-21 12:06:12,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-21 12:06:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:06:12,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:12,227 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:12,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:06:12,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -976603346, now seen corresponding path program 1 times [2021-08-21 12:06:12,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:12,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580705910] [2021-08-21 12:06:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:12,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:12,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:12,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580705910] [2021-08-21 12:06:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580705910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:12,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044460749] [2021-08-21 12:06:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:12,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:12,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:12,380 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) [2021-08-21 12:06:12,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:06:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:12,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:06:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044460749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:12,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:12,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:06:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460113384] [2021-08-21 12:06:12,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:12,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:12,685 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:12,750 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-08-21 12:06:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:06:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-08-21 12:06:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:12,752 INFO L225 Difference]: With dead ends: 30 [2021-08-21 12:06:12,752 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 12:06:12,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 12:06:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 12:06:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-21 12:06:12,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-21 12:06:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:12,756 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-21 12:06:12,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-21 12:06:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:06:12,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:12,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:12,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:12,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:12,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash 653560174, now seen corresponding path program 2 times [2021-08-21 12:06:12,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:12,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274545628] [2021-08-21 12:06:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:12,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:13,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:13,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274545628] [2021-08-21 12:06:13,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274545628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:13,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770690763] [2021-08-21 12:06:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:13,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:13,089 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) [2021-08-21 12:06:13,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:06:13,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:13,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:13,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2021-08-21 12:06:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:13,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770690763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:13,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:13,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:06:13,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664833006] [2021-08-21 12:06:13,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:13,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:13,406 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:13,500 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-08-21 12:06:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-08-21 12:06:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:13,503 INFO L225 Difference]: With dead ends: 35 [2021-08-21 12:06:13,503 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 12:06:13,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 12:06:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-08-21 12:06:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-21 12:06:13,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-21 12:06:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:13,510 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-21 12:06:13,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-21 12:06:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:06:13,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:13,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:13,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:13,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 12:06:13,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash -209476878, now seen corresponding path program 3 times [2021-08-21 12:06:13,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:13,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471639205] [2021-08-21 12:06:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:13,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:13,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:13,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471639205] [2021-08-21 12:06:13,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471639205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:13,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559296294] [2021-08-21 12:06:13,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:13,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:13,816 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) [2021-08-21 12:06:13,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:06:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:06:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:13,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:14,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2021-08-21 12:06:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559296294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:14,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:06:14,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753518630] [2021-08-21 12:06:14,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:14,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:14,259 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:14,405 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-08-21 12:06:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:06:14,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-08-21 12:06:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:14,407 INFO L225 Difference]: With dead ends: 51 [2021-08-21 12:06:14,407 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 12:06:14,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 12:06:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-08-21 12:06:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-21 12:06:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-08-21 12:06:14,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-08-21 12:06:14,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:14,423 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-08-21 12:06:14,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-21 12:06:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-08-21 12:06:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:06:14,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:14,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:14,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:14,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:14,645 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1785949972, now seen corresponding path program 1 times [2021-08-21 12:06:14,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:14,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771499203] [2021-08-21 12:06:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:14,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:14,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771499203] [2021-08-21 12:06:14,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771499203] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:06:14,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:06:14,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:06:14,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71097865] [2021-08-21 12:06:14,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:06:14,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:06:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:06:14,679 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:14,698 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-08-21 12:06:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:06:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 12:06:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:14,700 INFO L225 Difference]: With dead ends: 29 [2021-08-21 12:06:14,700 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 12:06:14,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:06:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 12:06:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-21 12:06:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2021-08-21 12:06:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-08-21 12:06:14,703 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-08-21 12:06:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-08-21 12:06:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-08-21 12:06:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:06:14,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:14,704 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:14,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:06:14,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1961287763, now seen corresponding path program 4 times [2021-08-21 12:06:14,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:14,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278669769] [2021-08-21 12:06:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:14,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278669769] [2021-08-21 12:06:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278669769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486931436] [2021-08-21 12:06:14,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:14,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:14,777 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) [2021-08-21 12:06:14,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:06:14,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:15,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:15,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2021-08-21 12:06:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486931436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:15,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:06:15,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338519387] [2021-08-21 12:06:15,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:15,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:15,149 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:15,215 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-08-21 12:06:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:06:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:06:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:15,216 INFO L225 Difference]: With dead ends: 39 [2021-08-21 12:06:15,216 INFO L226 Difference]: Without dead ends: 34 [2021-08-21 12:06:15,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-21 12:06:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-08-21 12:06:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2021-08-21 12:06:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-08-21 12:06:15,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-08-21 12:06:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:15,229 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-08-21 12:06:15,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-08-21 12:06:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:06:15,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:15,246 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:15,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:15,470 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 [2021-08-21 12:06:15,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1194161295, now seen corresponding path program 5 times [2021-08-21 12:06:15,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:15,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015470950] [2021-08-21 12:06:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:15,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:15,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015470950] [2021-08-21 12:06:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015470950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747668627] [2021-08-21 12:06:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:15,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:15,538 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) [2021-08-21 12:06:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:06:15,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:15,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-21 12:06:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747668627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:15,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:06:15,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964828308] [2021-08-21 12:06:15,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:15,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:15,937 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:16,024 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-08-21 12:06:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:06:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:16,026 INFO L225 Difference]: With dead ends: 50 [2021-08-21 12:06:16,026 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 12:06:16,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:06:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 12:06:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-08-21 12:06:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2021-08-21 12:06:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-08-21 12:06:16,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-08-21 12:06:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:16,029 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-08-21 12:06:16,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-08-21 12:06:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:06:16,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:16,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:16,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:16,254 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 [2021-08-21 12:06:16,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1524332907, now seen corresponding path program 1 times [2021-08-21 12:06:16,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:16,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037376408] [2021-08-21 12:06:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:16,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:16,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037376408] [2021-08-21 12:06:16,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037376408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155925968] [2021-08-21 12:06:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:16,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:16,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:16,300 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) [2021-08-21 12:06:16,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:06:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:06:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155925968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 12:06:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580998106] [2021-08-21 12:06:16,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:06:16,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:06:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:06:16,481 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:16,518 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-08-21 12:06:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:06:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:06:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:16,520 INFO L225 Difference]: With dead ends: 58 [2021-08-21 12:06:16,520 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 12:06:16,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 12:06:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-08-21 12:06:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 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) [2021-08-21 12:06:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-08-21 12:06:16,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-08-21 12:06:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:16,523 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-08-21 12:06:16,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-08-21 12:06:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:06:16,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:16,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:16,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:16,748 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 [2021-08-21 12:06:16,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1281229393, now seen corresponding path program 2 times [2021-08-21 12:06:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:16,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922750563] [2021-08-21 12:06:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:16,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:16,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922750563] [2021-08-21 12:06:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922750563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942350587] [2021-08-21 12:06:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:16,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:16,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:16,795 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) [2021-08-21 12:06:16,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:06:16,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:16,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:06:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942350587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:16,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 12:06:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17389575] [2021-08-21 12:06:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:06:16,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:06:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:06:16,962 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:17,003 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-08-21 12:06:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:06:17,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:06:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:17,004 INFO L225 Difference]: With dead ends: 44 [2021-08-21 12:06:17,004 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 12:06:17,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:06:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 12:06:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-08-21 12:06:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-08-21 12:06:17,006 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-08-21 12:06:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:17,007 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-08-21 12:06:17,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-08-21 12:06:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:17,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:17,007 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:17,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:17,208 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 [2021-08-21 12:06:17,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -643753026, now seen corresponding path program 3 times [2021-08-21 12:06:17,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:17,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239151590] [2021-08-21 12:06:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:17,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:17,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239151590] [2021-08-21 12:06:17,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239151590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614999889] [2021-08-21 12:06:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:17,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:17,264 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) [2021-08-21 12:06:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:06:17,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:06:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614999889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:17,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:17,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846301503] [2021-08-21 12:06:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:17,424 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:17,500 INFO L93 Difference]: Finished difference Result 77 states and 134 transitions. [2021-08-21 12:06:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:06:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:17,502 INFO L225 Difference]: With dead ends: 77 [2021-08-21 12:06:17,503 INFO L226 Difference]: Without dead ends: 74 [2021-08-21 12:06:17,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-21 12:06:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 37. [2021-08-21 12:06:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2021-08-21 12:06:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 79 transitions. [2021-08-21 12:06:17,505 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 79 transitions. Word has length 13 [2021-08-21 12:06:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 79 transitions. [2021-08-21 12:06:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 79 transitions. [2021-08-21 12:06:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:17,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:17,506 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:17,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:17,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:06:17,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1873233678, now seen corresponding path program 6 times [2021-08-21 12:06:17,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:17,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399430303] [2021-08-21 12:06:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:17,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:17,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399430303] [2021-08-21 12:06:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399430303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843173429] [2021-08-21 12:06:17,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:17,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:17,758 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) [2021-08-21 12:06:17,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:06:17,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:06:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843173429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:17,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:17,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466865749] [2021-08-21 12:06:17,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:17,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:17,947 INFO L87 Difference]: Start difference. First operand 37 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:17,994 INFO L93 Difference]: Finished difference Result 69 states and 124 transitions. [2021-08-21 12:06:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:06:17,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:17,995 INFO L225 Difference]: With dead ends: 69 [2021-08-21 12:06:17,995 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 12:06:17,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:06:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 12:06:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2021-08-21 12:06:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-08-21 12:06:17,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-08-21 12:06:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:17,998 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-08-21 12:06:17,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-08-21 12:06:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:17,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:17,999 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:18,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:18,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:18,209 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1654607150, now seen corresponding path program 7 times [2021-08-21 12:06:18,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:18,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293268609] [2021-08-21 12:06:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:18,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:18,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:18,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293268609] [2021-08-21 12:06:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293268609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:18,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153678669] [2021-08-21 12:06:18,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:18,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:18,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:18,258 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) [2021-08-21 12:06:18,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:06:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153678669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:18,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:18,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:18,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236880086] [2021-08-21 12:06:18,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:18,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:18,428 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:18,501 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-08-21 12:06:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:18,502 INFO L225 Difference]: With dead ends: 51 [2021-08-21 12:06:18,502 INFO L226 Difference]: Without dead ends: 49 [2021-08-21 12:06:18,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-21 12:06:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-08-21 12:06:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-08-21 12:06:18,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-08-21 12:06:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-08-21 12:06:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-08-21 12:06:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:18,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:18,506 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:18,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:18,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:06:18,707 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1063887052, now seen corresponding path program 4 times [2021-08-21 12:06:18,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:18,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015216073] [2021-08-21 12:06:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:18,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:18,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:18,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015216073] [2021-08-21 12:06:18,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015216073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:18,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240985719] [2021-08-21 12:06:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:18,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:18,745 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) [2021-08-21 12:06:18,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:06:18,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240985719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:18,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:18,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:18,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593451644] [2021-08-21 12:06:18,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:18,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:18,928 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:18,974 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-08-21 12:06:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:06:18,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:18,975 INFO L225 Difference]: With dead ends: 68 [2021-08-21 12:06:18,975 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 12:06:18,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:06:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 12:06:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-08-21 12:06:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 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) [2021-08-21 12:06:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-08-21 12:06:18,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-08-21 12:06:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:18,978 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-08-21 12:06:18,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-08-21 12:06:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:18,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:18,979 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:19,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:06:19,198 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1656015310, now seen corresponding path program 8 times [2021-08-21 12:06:19,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:19,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886745102] [2021-08-21 12:06:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:19,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:19,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886745102] [2021-08-21 12:06:19,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886745102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208949246] [2021-08-21 12:06:19,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:19,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:19,238 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) [2021-08-21 12:06:19,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:06:19,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208949246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:19,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:19,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848755420] [2021-08-21 12:06:19,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:19,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:19,408 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:19,454 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-08-21 12:06:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:19,454 INFO L225 Difference]: With dead ends: 51 [2021-08-21 12:06:19,455 INFO L226 Difference]: Without dead ends: 47 [2021-08-21 12:06:19,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-21 12:06:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-08-21 12:06:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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) [2021-08-21 12:06:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-08-21 12:06:19,457 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-08-21 12:06:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:19,457 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-08-21 12:06:19,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-08-21 12:06:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:19,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:19,458 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:19,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:06:19,665 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1741675248, now seen corresponding path program 5 times [2021-08-21 12:06:19,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:19,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568425351] [2021-08-21 12:06:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:19,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568425351] [2021-08-21 12:06:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568425351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704284350] [2021-08-21 12:06:19,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:19,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:19,715 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) [2021-08-21 12:06:19,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:06:19,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:19,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704284350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:19,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:19,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099159750] [2021-08-21 12:06:19,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:19,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:19,896 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:19,958 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-08-21 12:06:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:19,959 INFO L225 Difference]: With dead ends: 61 [2021-08-21 12:06:19,959 INFO L226 Difference]: Without dead ends: 61 [2021-08-21 12:06:19,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-21 12:06:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-08-21 12:06:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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) [2021-08-21 12:06:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-08-21 12:06:19,962 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-08-21 12:06:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:19,962 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-08-21 12:06:19,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-08-21 12:06:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:19,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:19,963 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:20,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:06:20,170 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1206096466, now seen corresponding path program 9 times [2021-08-21 12:06:20,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:20,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976518345] [2021-08-21 12:06:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:20,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:20,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976518345] [2021-08-21 12:06:20,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976518345] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:06:20,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:06:20,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:06:20,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629527350] [2021-08-21 12:06:20,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:06:20,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:06:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:06:20,210 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:20,229 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-08-21 12:06:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:06:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:20,230 INFO L225 Difference]: With dead ends: 42 [2021-08-21 12:06:20,230 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 12:06:20,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:06:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 12:06:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 12:06:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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) [2021-08-21 12:06:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-08-21 12:06:20,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-08-21 12:06:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:20,238 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-08-21 12:06:20,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-08-21 12:06:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:06:20,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:20,242 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:20,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 12:06:20,242 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1480206668, now seen corresponding path program 6 times [2021-08-21 12:06:20,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:20,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056930645] [2021-08-21 12:06:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:20,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056930645] [2021-08-21 12:06:20,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056930645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67726125] [2021-08-21 12:06:20,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:20,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:20,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:20,286 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) [2021-08-21 12:06:20,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:06:20,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:06:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:06:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67726125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:20,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:20,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:06:20,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527010951] [2021-08-21 12:06:20,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:06:20,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:06:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:06:20,473 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:20,543 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-08-21 12:06:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:06:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:20,544 INFO L225 Difference]: With dead ends: 61 [2021-08-21 12:06:20,544 INFO L226 Difference]: Without dead ends: 61 [2021-08-21 12:06:20,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-21 12:06:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-08-21 12:06:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-08-21 12:06:20,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-08-21 12:06:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:20,547 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-08-21 12:06:20,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-08-21 12:06:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:20,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:20,547 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:20,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:20,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:20,771 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2032672643, now seen corresponding path program 7 times [2021-08-21 12:06:20,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:20,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624372103] [2021-08-21 12:06:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:20,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:20,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624372103] [2021-08-21 12:06:20,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624372103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:20,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912049180] [2021-08-21 12:06:20,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:20,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:20,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:20,885 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) [2021-08-21 12:06:20,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:06:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:21,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 12:06:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912049180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:21,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346044175] [2021-08-21 12:06:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:21,520 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:21,620 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-08-21 12:06:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:06:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:21,621 INFO L225 Difference]: With dead ends: 56 [2021-08-21 12:06:21,621 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 12:06:21,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 12:06:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-08-21 12:06:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 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) [2021-08-21 12:06:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-08-21 12:06:21,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-08-21 12:06:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:21,623 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-08-21 12:06:21,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-08-21 12:06:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:21,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:21,624 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:21,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:21,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:21,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -325032565, now seen corresponding path program 8 times [2021-08-21 12:06:21,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:21,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998033446] [2021-08-21 12:06:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:21,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:21,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:21,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998033446] [2021-08-21 12:06:21,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998033446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411262979] [2021-08-21 12:06:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:21,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:21,935 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) [2021-08-21 12:06:21,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:06:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:22,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:22,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 12:06:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:22,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411262979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:22,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:22,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:22,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523461403] [2021-08-21 12:06:22,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:22,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:22,627 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:22,776 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-08-21 12:06:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:22,777 INFO L225 Difference]: With dead ends: 70 [2021-08-21 12:06:22,777 INFO L226 Difference]: Without dead ends: 56 [2021-08-21 12:06:22,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-21 12:06:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-08-21 12:06:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-08-21 12:06:22,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-08-21 12:06:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:22,780 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-08-21 12:06:22,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-08-21 12:06:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:22,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:22,782 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:22,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:22,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,985 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1305130955, now seen corresponding path program 9 times [2021-08-21 12:06:22,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:22,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759763252] [2021-08-21 12:06:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:22,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:23,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759763252] [2021-08-21 12:06:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759763252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349820155] [2021-08-21 12:06:23,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:23,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:23,080 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) [2021-08-21 12:06:23,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:06:23,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:06:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:23,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:23,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 130 [2021-08-21 12:06:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:24,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349820155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:24,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:24,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:24,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809111576] [2021-08-21 12:06:24,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:24,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:24,054 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:24,225 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-08-21 12:06:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:24,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:24,226 INFO L225 Difference]: With dead ends: 88 [2021-08-21 12:06:24,226 INFO L226 Difference]: Without dead ends: 78 [2021-08-21 12:06:24,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-21 12:06:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-08-21 12:06:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-08-21 12:06:24,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-08-21 12:06:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:24,228 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-08-21 12:06:24,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-08-21 12:06:24,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:24,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:24,229 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:24,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 12:06:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:24,452 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1164372431, now seen corresponding path program 10 times [2021-08-21 12:06:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:24,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990416270] [2021-08-21 12:06:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:24,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:24,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:24,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990416270] [2021-08-21 12:06:24,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990416270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:24,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205828163] [2021-08-21 12:06:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:24,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:24,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:24,539 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) [2021-08-21 12:06:24,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:06:24,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:24,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:25,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:25,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 12:06:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:25,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205828163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:25,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:25,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:25,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59992954] [2021-08-21 12:06:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:25,408 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:25,555 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-08-21 12:06:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:25,555 INFO L225 Difference]: With dead ends: 76 [2021-08-21 12:06:25,555 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 12:06:25,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 12:06:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-08-21 12:06:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-08-21 12:06:25,558 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-08-21 12:06:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:25,558 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-08-21 12:06:25,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-08-21 12:06:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:25,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:25,558 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:25,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:25,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:25,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1500431345, now seen corresponding path program 11 times [2021-08-21 12:06:25,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:25,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49447699] [2021-08-21 12:06:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:25,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:25,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:25,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49447699] [2021-08-21 12:06:25,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49447699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:25,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145832419] [2021-08-21 12:06:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:25,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:25,853 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) [2021-08-21 12:06:25,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:06:26,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:06:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:26,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:26,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 130 [2021-08-21 12:06:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:27,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145832419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:27,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:27,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563417182] [2021-08-21 12:06:27,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:27,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:27,251 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:27,451 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-08-21 12:06:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:27,452 INFO L225 Difference]: With dead ends: 101 [2021-08-21 12:06:27,452 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 12:06:27,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:06:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 12:06:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-08-21 12:06:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-08-21 12:06:27,455 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-08-21 12:06:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:27,455 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-08-21 12:06:27,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-08-21 12:06:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:27,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:27,456 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:27,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:27,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,680 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1931498899, now seen corresponding path program 12 times [2021-08-21 12:06:27,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:27,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884572888] [2021-08-21 12:06:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:27,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:27,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:27,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884572888] [2021-08-21 12:06:27,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884572888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883642124] [2021-08-21 12:06:27,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:27,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:27,768 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) [2021-08-21 12:06:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:06:28,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:06:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:28,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:28,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:28,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883642124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:28,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:28,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:28,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062156139] [2021-08-21 12:06:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:28,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:28,714 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:28,882 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-08-21 12:06:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:28,884 INFO L225 Difference]: With dead ends: 80 [2021-08-21 12:06:28,884 INFO L226 Difference]: Without dead ends: 75 [2021-08-21 12:06:28,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-21 12:06:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-08-21 12:06:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-08-21 12:06:28,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-08-21 12:06:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:28,887 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-08-21 12:06:28,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-08-21 12:06:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:28,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:28,888 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:28,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:29,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:06:29,093 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 91287051, now seen corresponding path program 13 times [2021-08-21 12:06:29,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:29,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715596903] [2021-08-21 12:06:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:29,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:29,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:29,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715596903] [2021-08-21 12:06:29,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715596903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:29,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967681642] [2021-08-21 12:06:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:29,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:29,186 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) [2021-08-21 12:06:29,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:06:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:29,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 12:06:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:30,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967681642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:30,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:30,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:30,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861188222] [2021-08-21 12:06:30,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:30,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:30,040 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:30,184 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-08-21 12:06:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:30,185 INFO L225 Difference]: With dead ends: 81 [2021-08-21 12:06:30,185 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 12:06:30,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 12:06:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-21 12:06:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-08-21 12:06:30,188 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-08-21 12:06:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:30,188 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-08-21 12:06:30,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-08-21 12:06:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:30,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:30,189 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:30,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:06:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 12:06:30,397 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:30,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1721450571, now seen corresponding path program 14 times [2021-08-21 12:06:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:30,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691978074] [2021-08-21 12:06:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:30,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:30,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:30,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691978074] [2021-08-21 12:06:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691978074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:30,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588790235] [2021-08-21 12:06:30,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:30,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:30,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:30,481 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) [2021-08-21 12:06:30,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:06:30,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:30,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 130 [2021-08-21 12:06:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588790235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:31,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:31,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:31,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250252761] [2021-08-21 12:06:31,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:31,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:31,548 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:31,804 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-08-21 12:06:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:31,805 INFO L225 Difference]: With dead ends: 102 [2021-08-21 12:06:31,805 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 12:06:31,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 12:06:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-08-21 12:06:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-08-21 12:06:31,807 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-08-21 12:06:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:31,807 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-08-21 12:06:31,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-08-21 12:06:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:31,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:31,807 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:32,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:06:32,008 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash 858413519, now seen corresponding path program 15 times [2021-08-21 12:06:32,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:32,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567977574] [2021-08-21 12:06:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:32,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:32,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:32,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567977574] [2021-08-21 12:06:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567977574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:32,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583518199] [2021-08-21 12:06:32,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:32,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:32,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:32,104 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) [2021-08-21 12:06:32,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:06:32,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:06:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:32,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:32,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:33,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583518199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:33,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:33,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:33,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801944579] [2021-08-21 12:06:33,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:33,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:33,199 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:33,443 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-08-21 12:06:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:06:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:33,443 INFO L225 Difference]: With dead ends: 84 [2021-08-21 12:06:33,443 INFO L226 Difference]: Without dead ends: 79 [2021-08-21 12:06:33,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-21 12:06:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-08-21 12:06:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-08-21 12:06:33,446 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-08-21 12:06:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:33,446 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-08-21 12:06:33,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-08-21 12:06:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:33,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:33,447 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:33,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:33,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:33,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -125931317, now seen corresponding path program 16 times [2021-08-21 12:06:33,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:33,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958686254] [2021-08-21 12:06:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:33,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:33,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:33,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958686254] [2021-08-21 12:06:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958686254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:33,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802191223] [2021-08-21 12:06:33,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:33,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:33,753 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) [2021-08-21 12:06:33,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:06:34,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:34,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:34,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802191223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:34,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:34,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:34,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965406106] [2021-08-21 12:06:34,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:34,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:34,811 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:35,081 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-08-21 12:06:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:06:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:35,082 INFO L225 Difference]: With dead ends: 96 [2021-08-21 12:06:35,082 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 12:06:35,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:06:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 12:06:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-08-21 12:06:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-08-21 12:06:35,085 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-08-21 12:06:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:35,085 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-08-21 12:06:35,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-08-21 12:06:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:35,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:35,086 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:35,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:35,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:06:35,301 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1185378639, now seen corresponding path program 17 times [2021-08-21 12:06:35,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:35,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804462752] [2021-08-21 12:06:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:35,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:35,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804462752] [2021-08-21 12:06:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804462752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819365960] [2021-08-21 12:06:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:35,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:35,401 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) [2021-08-21 12:06:35,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:06:35,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:06:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:36,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:36,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 133 [2021-08-21 12:06:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819365960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:36,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:36,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485270481] [2021-08-21 12:06:36,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:36,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:36,192 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:36,347 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-08-21 12:06:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:36,348 INFO L225 Difference]: With dead ends: 89 [2021-08-21 12:06:36,348 INFO L226 Difference]: Without dead ends: 75 [2021-08-21 12:06:36,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-21 12:06:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-08-21 12:06:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-08-21 12:06:36,350 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-08-21 12:06:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:36,350 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-08-21 12:06:36,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-08-21 12:06:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:36,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:36,351 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:36,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:36,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:06:36,557 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1479425137, now seen corresponding path program 18 times [2021-08-21 12:06:36,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:36,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694942851] [2021-08-21 12:06:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:36,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:36,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:36,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694942851] [2021-08-21 12:06:36,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694942851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:36,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231673178] [2021-08-21 12:06:36,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:36,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:36,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:36,650 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) [2021-08-21 12:06:36,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:06:36,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:06:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:36,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:37,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 130 [2021-08-21 12:06:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:37,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231673178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:37,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:37,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:37,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061189332] [2021-08-21 12:06:37,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:37,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:37,649 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:37,899 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-08-21 12:06:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:06:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:37,900 INFO L225 Difference]: With dead ends: 112 [2021-08-21 12:06:37,901 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 12:06:37,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 12:06:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-08-21 12:06:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-08-21 12:06:37,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-08-21 12:06:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-08-21 12:06:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-08-21 12:06:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:37,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:37,904 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:37,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:38,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:38,117 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1952505107, now seen corresponding path program 19 times [2021-08-21 12:06:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453808302] [2021-08-21 12:06:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:38,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:38,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:38,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453808302] [2021-08-21 12:06:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453808302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:38,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57116780] [2021-08-21 12:06:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:38,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:38,211 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) [2021-08-21 12:06:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:06:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:38,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:39,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57116780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:39,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:39,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:39,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522377294] [2021-08-21 12:06:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:39,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:39,530 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:39,726 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-08-21 12:06:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:39,727 INFO L225 Difference]: With dead ends: 97 [2021-08-21 12:06:39,727 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 12:06:39,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 12:06:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-08-21 12:06:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-08-21 12:06:39,729 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-08-21 12:06:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-08-21 12:06:39,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-08-21 12:06:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:39,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:39,730 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:39,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 12:06:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:39,945 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash 968160271, now seen corresponding path program 20 times [2021-08-21 12:06:39,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:39,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799914931] [2021-08-21 12:06:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:39,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:40,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:40,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799914931] [2021-08-21 12:06:40,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799914931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:40,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101768802] [2021-08-21 12:06:40,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:40,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:40,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:40,026 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) [2021-08-21 12:06:40,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:06:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:40,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:41,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101768802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:41,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:41,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:41,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070075506] [2021-08-21 12:06:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:41,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:41,037 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:41,323 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-08-21 12:06:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:06:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:41,324 INFO L225 Difference]: With dead ends: 107 [2021-08-21 12:06:41,324 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 12:06:41,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 12:06:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-08-21 12:06:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-08-21 12:06:41,332 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-08-21 12:06:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-08-21 12:06:41,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-08-21 12:06:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:06:41,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:41,334 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:41,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:41,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:41,558 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash 518241427, now seen corresponding path program 21 times [2021-08-21 12:06:41,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:41,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247355812] [2021-08-21 12:06:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:41,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:41,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:41,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247355812] [2021-08-21 12:06:41,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247355812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:41,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142433231] [2021-08-21 12:06:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:41,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:41,645 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) [2021-08-21 12:06:41,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:06:42,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:06:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:06:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:42,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:42,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2021-08-21 12:06:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142433231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:42,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:42,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:06:42,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009983794] [2021-08-21 12:06:42,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:42,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:42,787 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:43,097 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-08-21 12:06:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:43,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:06:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:43,098 INFO L225 Difference]: With dead ends: 112 [2021-08-21 12:06:43,098 INFO L226 Difference]: Without dead ends: 107 [2021-08-21 12:06:43,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-21 12:06:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-08-21 12:06:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-08-21 12:06:43,101 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-08-21 12:06:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:43,101 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-08-21 12:06:43,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-08-21 12:06:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:43,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:43,101 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:43,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 12:06:43,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:43,317 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2139507810, now seen corresponding path program 22 times [2021-08-21 12:06:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:43,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126427176] [2021-08-21 12:06:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:43,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:43,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126427176] [2021-08-21 12:06:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126427176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301059461] [2021-08-21 12:06:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:43,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:43,444 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) [2021-08-21 12:06:43,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:06:43,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:43,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:44,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 12:06:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301059461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:44,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:44,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:44,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271763321] [2021-08-21 12:06:44,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:44,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:44,272 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:44,463 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-08-21 12:06:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:44,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:44,464 INFO L225 Difference]: With dead ends: 95 [2021-08-21 12:06:44,464 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 12:06:44,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 12:06:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-08-21 12:06:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-08-21 12:06:44,467 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-08-21 12:06:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-08-21 12:06:44,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-08-21 12:06:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:44,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:44,467 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:44,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 12:06:44,685 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash -431867732, now seen corresponding path program 23 times [2021-08-21 12:06:44,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:44,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379878576] [2021-08-21 12:06:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:44,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:44,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:44,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379878576] [2021-08-21 12:06:44,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379878576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:44,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284239319] [2021-08-21 12:06:44,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:44,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:44,812 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) [2021-08-21 12:06:44,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:06:45,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:06:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:45,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:45,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:45,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 12:06:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284239319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:45,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:45,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:45,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106984434] [2021-08-21 12:06:45,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:45,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:45,605 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:45,832 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-08-21 12:06:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:45,833 INFO L225 Difference]: With dead ends: 90 [2021-08-21 12:06:45,834 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 12:06:45,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 12:06:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-08-21 12:06:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-08-21 12:06:45,836 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-08-21 12:06:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:45,836 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-08-21 12:06:45,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-08-21 12:06:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:45,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:45,837 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:45,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:06:46,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:46,045 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1198295788, now seen corresponding path program 24 times [2021-08-21 12:06:46,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:46,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905414522] [2021-08-21 12:06:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:46,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:46,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:46,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905414522] [2021-08-21 12:06:46,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905414522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:46,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439174657] [2021-08-21 12:06:46,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:46,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:46,173 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) [2021-08-21 12:06:46,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:06:46,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:06:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:46,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:46,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:06:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:47,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439174657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:47,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:47,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:47,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2170379] [2021-08-21 12:06:47,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:47,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:47,488 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:47,708 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-08-21 12:06:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:06:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:47,709 INFO L225 Difference]: With dead ends: 112 [2021-08-21 12:06:47,709 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 12:06:47,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:06:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 12:06:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-08-21 12:06:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-08-21 12:06:47,711 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-08-21 12:06:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:47,711 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-08-21 12:06:47,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-08-21 12:06:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:47,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:47,712 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:47,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:47,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:47,917 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1824663732, now seen corresponding path program 25 times [2021-08-21 12:06:47,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:47,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13411463] [2021-08-21 12:06:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:47,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:48,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:48,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13411463] [2021-08-21 12:06:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13411463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:48,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012362538] [2021-08-21 12:06:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:48,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:48,031 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) [2021-08-21 12:06:48,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:06:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:48,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:48,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:06:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:49,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012362538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:49,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:49,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:06:49,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358154093] [2021-08-21 12:06:49,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:49,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:49,307 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-08-21 12:06:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:49,608 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-08-21 12:06:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 15 [2021-08-21 12:06:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:49,609 INFO L225 Difference]: With dead ends: 128 [2021-08-21 12:06:49,609 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 12:06:49,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 12:06:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-08-21 12:06:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-08-21 12:06:49,612 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-08-21 12:06:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:49,612 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-08-21 12:06:49,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-08-21 12:06:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-08-21 12:06:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:49,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:49,612 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:49,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:49,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:06:49,826 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash 248190638, now seen corresponding path program 26 times [2021-08-21 12:06:49,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:49,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811245522] [2021-08-21 12:06:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:49,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:49,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:49,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811245522] [2021-08-21 12:06:49,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811245522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:49,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140096490] [2021-08-21 12:06:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:49,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:49,865 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) [2021-08-21 12:06:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:06:50,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:50,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:06:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:50,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140096490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:50,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:50,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:06:50,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308270712] [2021-08-21 12:06:50,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:06:50,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:06:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:06:50,435 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:50,483 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-08-21 12:06:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:06:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:06:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:50,485 INFO L225 Difference]: With dead ends: 163 [2021-08-21 12:06:50,485 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 12:06:50,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 12:06:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-08-21 12:06:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-08-21 12:06:50,488 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-08-21 12:06:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-08-21 12:06:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-08-21 12:06:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:50,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:50,488 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:50,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:50,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:06:50,705 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash -15548116, now seen corresponding path program 27 times [2021-08-21 12:06:50,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:50,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848112474] [2021-08-21 12:06:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:50,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:50,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:50,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848112474] [2021-08-21 12:06:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848112474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:50,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295611841] [2021-08-21 12:06:50,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:50,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:50,855 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) [2021-08-21 12:06:50,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:06:51,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:06:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:51,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:51,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:51,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 12:06:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:51,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295611841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:51,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:51,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:51,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295987369] [2021-08-21 12:06:51,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:51,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:51,685 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:51,899 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-08-21 12:06:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:06:51,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:51,900 INFO L225 Difference]: With dead ends: 95 [2021-08-21 12:06:51,900 INFO L226 Difference]: Without dead ends: 86 [2021-08-21 12:06:51,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-21 12:06:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-08-21 12:06:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-08-21 12:06:51,903 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-08-21 12:06:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:51,903 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-08-21 12:06:51,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-08-21 12:06:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:51,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:51,903 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:51,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 12:06:52,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:06:52,113 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1614615404, now seen corresponding path program 28 times [2021-08-21 12:06:52,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:52,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596184216] [2021-08-21 12:06:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:52,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:52,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:52,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596184216] [2021-08-21 12:06:52,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596184216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:52,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186622546] [2021-08-21 12:06:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:52,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:52,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:52,258 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) [2021-08-21 12:06:52,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:06:52,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:52,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:53,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:06:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186622546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:53,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:53,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:53,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206763669] [2021-08-21 12:06:53,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:53,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:53,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:53,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:53,394 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:53,639 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-08-21 12:06:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:53,640 INFO L225 Difference]: With dead ends: 118 [2021-08-21 12:06:53,640 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 12:06:53,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:06:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 12:06:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-08-21 12:06:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-08-21 12:06:53,642 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-08-21 12:06:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-08-21 12:06:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-08-21 12:06:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:53,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:53,643 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:53,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:53,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:06:53,861 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash 751578352, now seen corresponding path program 29 times [2021-08-21 12:06:53,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:53,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355326803] [2021-08-21 12:06:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:53,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:53,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:53,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355326803] [2021-08-21 12:06:53,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355326803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:53,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159299082] [2021-08-21 12:06:53,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:53,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:53,982 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) [2021-08-21 12:06:53,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:06:54,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:06:54,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:54,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:54,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:54,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:06:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159299082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:55,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:55,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:55,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095308696] [2021-08-21 12:06:55,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:55,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:55,275 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:55,605 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-08-21 12:06:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:06:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:55,607 INFO L225 Difference]: With dead ends: 140 [2021-08-21 12:06:55,607 INFO L226 Difference]: Without dead ends: 130 [2021-08-21 12:06:55,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-21 12:06:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-08-21 12:06:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-08-21 12:06:55,610 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-08-21 12:06:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:55,610 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-08-21 12:06:55,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-08-21 12:06:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:55,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:55,610 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:55,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:55,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:55,835 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -232766484, now seen corresponding path program 30 times [2021-08-21 12:06:55,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:55,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898015218] [2021-08-21 12:06:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:55,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:55,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898015218] [2021-08-21 12:06:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898015218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47610457] [2021-08-21 12:06:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:55,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:55,943 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) [2021-08-21 12:06:55,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:06:56,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:06:56,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:56,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:56,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:06:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47610457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:57,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:57,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:57,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486901865] [2021-08-21 12:06:57,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:57,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:57,125 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:57,551 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-08-21 12:06:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:06:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:06:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:57,552 INFO L225 Difference]: With dead ends: 157 [2021-08-21 12:06:57,552 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 12:06:57,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 12:06:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-08-21 12:06:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-08-21 12:06:57,555 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-08-21 12:06:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:57,556 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-08-21 12:06:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:06:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-08-21 12:06:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:57,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:57,556 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:57,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:57,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:06:57,769 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash 664510254, now seen corresponding path program 31 times [2021-08-21 12:06:57,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:57,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279031309] [2021-08-21 12:06:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:57,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:57,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279031309] [2021-08-21 12:06:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279031309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235077768] [2021-08-21 12:06:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:57,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:57,814 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) [2021-08-21 12:06:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:06:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:06:58,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235077768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:58,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:06:58,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30166235] [2021-08-21 12:06:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:06:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:06:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:06:58,473 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:58,547 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-08-21 12:06:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:06:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:06:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:58,549 INFO L225 Difference]: With dead ends: 200 [2021-08-21 12:06:58,549 INFO L226 Difference]: Without dead ends: 200 [2021-08-21 12:06:58,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:06:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-21 12:06:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-08-21 12:06:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-08-21 12:06:58,553 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-08-21 12:06:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:58,554 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-08-21 12:06:58,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-08-21 12:06:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:06:58,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:58,555 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:58,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:58,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 12:06:58,769 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1078543472, now seen corresponding path program 32 times [2021-08-21 12:06:58,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:58,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196847021] [2021-08-21 12:06:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:58,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:58,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:58,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196847021] [2021-08-21 12:06:58,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196847021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:58,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548356812] [2021-08-21 12:06:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:58,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:58,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:58,921 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) [2021-08-21 12:06:58,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:06:59,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:59,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:59,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:06:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:59,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:06:59,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 12:06:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:59,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548356812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:59,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:06:59,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750339491] [2021-08-21 12:06:59,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:59,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:59,860 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:00,093 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-08-21 12:07:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:07:00,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:00,094 INFO L225 Difference]: With dead ends: 107 [2021-08-21 12:07:00,094 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 12:07:00,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 12:07:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-08-21 12:07:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-08-21 12:07:00,097 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-08-21 12:07:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:00,097 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-08-21 12:07:00,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-08-21 12:07:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:00,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:00,098 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:00,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:07:00,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 12:07:00,305 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1586260304, now seen corresponding path program 33 times [2021-08-21 12:07:00,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:00,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876844944] [2021-08-21 12:07:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:00,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:00,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:00,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876844944] [2021-08-21 12:07:00,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876844944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:00,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322813153] [2021-08-21 12:07:00,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:00,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:00,455 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) [2021-08-21 12:07:00,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:07:01,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:01,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:01,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:01,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:01,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322813153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:01,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:01,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498366786] [2021-08-21 12:07:01,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:01,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:01,743 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:02,065 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-08-21 12:07:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:07:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:02,066 INFO L225 Difference]: With dead ends: 135 [2021-08-21 12:07:02,066 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 12:07:02,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:07:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 12:07:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-08-21 12:07:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-08-21 12:07:02,070 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-08-21 12:07:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:02,070 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-08-21 12:07:02,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-08-21 12:07:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:02,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:02,070 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:02,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:02,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:02,281 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1845669940, now seen corresponding path program 34 times [2021-08-21 12:07:02,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:02,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281588445] [2021-08-21 12:07:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:02,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:02,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:02,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281588445] [2021-08-21 12:07:02,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281588445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:02,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704932833] [2021-08-21 12:07:02,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:02,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:02,408 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) [2021-08-21 12:07:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:07:03,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:03,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:03,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:03,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704932833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:03,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:03,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:03,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539046927] [2021-08-21 12:07:03,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:03,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:03,752 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:04,135 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-08-21 12:07:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:07:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:04,137 INFO L225 Difference]: With dead ends: 158 [2021-08-21 12:07:04,137 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 12:07:04,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:07:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 12:07:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-08-21 12:07:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-08-21 12:07:04,140 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-08-21 12:07:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-08-21 12:07:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-08-21 12:07:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:04,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:04,140 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:04,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:04,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:04,356 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 861325104, now seen corresponding path program 35 times [2021-08-21 12:07:04,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:04,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848989901] [2021-08-21 12:07:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:04,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:04,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:04,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848989901] [2021-08-21 12:07:04,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848989901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:04,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77773420] [2021-08-21 12:07:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:04,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:04,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:04,468 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) [2021-08-21 12:07:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:07:05,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:07:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:05,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:05,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:05,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77773420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:05,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:05,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:05,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034272762] [2021-08-21 12:07:05,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:05,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:05,902 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:06,381 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-08-21 12:07:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:07:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:06,382 INFO L225 Difference]: With dead ends: 169 [2021-08-21 12:07:06,383 INFO L226 Difference]: Without dead ends: 159 [2021-08-21 12:07:06,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:07:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-21 12:07:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-08-21 12:07:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-08-21 12:07:06,386 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-08-21 12:07:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:06,386 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-08-21 12:07:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-08-21 12:07:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:06,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:06,387 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:06,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 12:07:06,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:07:06,609 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash 411406260, now seen corresponding path program 36 times [2021-08-21 12:07:06,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:06,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82913377] [2021-08-21 12:07:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:06,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:06,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82913377] [2021-08-21 12:07:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82913377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:06,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76629080] [2021-08-21 12:07:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:06,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:06,718 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) [2021-08-21 12:07:06,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:07:07,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:07:07,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:07,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:07,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76629080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:08,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:08,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:08,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88905628] [2021-08-21 12:07:08,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:08,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:08,477 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:08,895 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-08-21 12:07:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:07:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:08,896 INFO L225 Difference]: With dead ends: 140 [2021-08-21 12:07:08,896 INFO L226 Difference]: Without dead ends: 130 [2021-08-21 12:07:08,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 441.9ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-21 12:07:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-08-21 12:07:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-08-21 12:07:08,899 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-08-21 12:07:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:08,899 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-08-21 12:07:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-08-21 12:07:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:08,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:08,900 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:08,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 12:07:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 12:07:09,125 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 685516462, now seen corresponding path program 37 times [2021-08-21 12:07:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:09,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451084615] [2021-08-21 12:07:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:09,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:09,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451084615] [2021-08-21 12:07:09,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451084615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770497357] [2021-08-21 12:07:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:09,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:09,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:09,167 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) [2021-08-21 12:07:09,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:07:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:07:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770497357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:09,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:09,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:07:09,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307315366] [2021-08-21 12:07:09,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:09,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:09,970 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:10,062 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-08-21 12:07:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:07:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:07:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:10,064 INFO L225 Difference]: With dead ends: 170 [2021-08-21 12:07:10,064 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 12:07:10,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 12:07:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-08-21 12:07:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-08-21 12:07:10,067 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-08-21 12:07:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:10,067 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-08-21 12:07:10,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-08-21 12:07:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:10,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:10,068 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:10,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:07:10,293 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 635644332, now seen corresponding path program 38 times [2021-08-21 12:07:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:10,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228674950] [2021-08-21 12:07:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:10,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:10,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:10,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228674950] [2021-08-21 12:07:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228674950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:10,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459579308] [2021-08-21 12:07:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:10,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:10,454 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) [2021-08-21 12:07:10,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:07:11,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:11,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:11,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:11,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-21 12:07:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:11,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459579308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:11,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:11,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:11,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638459323] [2021-08-21 12:07:11,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:11,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:11,571 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:11,746 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-08-21 12:07:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:07:11,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:11,747 INFO L225 Difference]: With dead ends: 120 [2021-08-21 12:07:11,747 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 12:07:11,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 12:07:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-08-21 12:07:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-08-21 12:07:11,749 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-08-21 12:07:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-08-21 12:07:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-08-21 12:07:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:11,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:11,750 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:11,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 12:07:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:11,957 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2029159444, now seen corresponding path program 39 times [2021-08-21 12:07:11,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:11,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530104415] [2021-08-21 12:07:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:11,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:12,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:12,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530104415] [2021-08-21 12:07:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530104415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:12,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502005105] [2021-08-21 12:07:12,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:12,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:12,113 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) [2021-08-21 12:07:12,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:07:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:12,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:13,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502005105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:13,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:13,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237786614] [2021-08-21 12:07:13,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:13,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:13,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:13,622 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:13,903 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-08-21 12:07:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:07:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:13,904 INFO L225 Difference]: With dead ends: 154 [2021-08-21 12:07:13,904 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 12:07:13,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:07:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 12:07:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-08-21 12:07:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-08-21 12:07:13,907 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-08-21 12:07:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:13,907 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-08-21 12:07:13,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-08-21 12:07:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:13,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:13,907 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:13,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:07:14,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:14,129 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1402770800, now seen corresponding path program 40 times [2021-08-21 12:07:14,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:14,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132625437] [2021-08-21 12:07:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:14,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:14,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:14,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132625437] [2021-08-21 12:07:14,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132625437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:14,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485129222] [2021-08-21 12:07:14,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:14,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:14,246 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) [2021-08-21 12:07:14,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:07:15,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:15,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:15,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:15,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485129222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:15,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572011298] [2021-08-21 12:07:15,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:15,442 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:15,908 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-08-21 12:07:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:07:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:15,910 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:07:15,910 INFO L226 Difference]: Without dead ends: 166 [2021-08-21 12:07:15,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-21 12:07:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-08-21 12:07:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-08-21 12:07:15,913 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-08-21 12:07:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:15,913 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-08-21 12:07:15,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-08-21 12:07:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:15,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:15,914 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:15,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:07:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,129 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -173702294, now seen corresponding path program 41 times [2021-08-21 12:07:16,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:16,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429716289] [2021-08-21 12:07:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:16,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:16,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:16,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429716289] [2021-08-21 12:07:16,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429716289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:16,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643638273] [2021-08-21 12:07:16,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:16,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:16,184 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) [2021-08-21 12:07:16,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:07:17,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:07:17,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:07:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:17,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643638273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:17,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:17,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:07:17,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690660155] [2021-08-21 12:07:17,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:07:17,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:07:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:07:17,065 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:17,100 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-08-21 12:07:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:07:17,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:07:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:17,101 INFO L225 Difference]: With dead ends: 196 [2021-08-21 12:07:17,101 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 12:07:17,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 12:07:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-08-21 12:07:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-08-21 12:07:17,105 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-08-21 12:07:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:17,105 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-08-21 12:07:17,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-08-21 12:07:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:17,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:17,106 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:17,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:17,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 12:07:17,322 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 418425964, now seen corresponding path program 42 times [2021-08-21 12:07:17,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:17,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287525808] [2021-08-21 12:07:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:17,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:17,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:17,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287525808] [2021-08-21 12:07:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287525808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:17,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766706030] [2021-08-21 12:07:17,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:17,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:17,431 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) [2021-08-21 12:07:17,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:07:18,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:07:18,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:18,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:18,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:18,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:18,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766706030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:19,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:19,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891137933] [2021-08-21 12:07:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:19,127 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:19,615 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-08-21 12:07:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:07:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:19,616 INFO L225 Difference]: With dead ends: 209 [2021-08-21 12:07:19,616 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:07:19,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:07:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:07:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-08-21 12:07:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-08-21 12:07:19,620 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-08-21 12:07:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:19,620 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-08-21 12:07:19,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-08-21 12:07:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:19,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:19,620 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:19,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 12:07:19,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 12:07:19,836 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1315702702, now seen corresponding path program 43 times [2021-08-21 12:07:19,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:19,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072721705] [2021-08-21 12:07:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:19,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:19,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072721705] [2021-08-21 12:07:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072721705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928037055] [2021-08-21 12:07:19,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:19,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:19,878 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) [2021-08-21 12:07:19,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:07:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:07:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:20,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928037055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:20,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:20,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:07:20,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66826661] [2021-08-21 12:07:20,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:20,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:20,752 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:20,815 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-08-21 12:07:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:07:20,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:07:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:20,816 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:07:20,816 INFO L226 Difference]: Without dead ends: 219 [2021-08-21 12:07:20,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-21 12:07:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-08-21 12:07:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-08-21 12:07:20,818 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-08-21 12:07:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-08-21 12:07:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-08-21 12:07:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:20,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:20,819 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:21,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:21,044 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -31492880, now seen corresponding path program 44 times [2021-08-21 12:07:21,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:21,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389795347] [2021-08-21 12:07:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:21,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:21,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389795347] [2021-08-21 12:07:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389795347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:21,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864702792] [2021-08-21 12:07:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:21,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:21,147 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) [2021-08-21 12:07:21,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:07:21,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:21,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:22,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:22,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:22,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864702792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:22,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:22,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538296805] [2021-08-21 12:07:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:22,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:22,911 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:23,317 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-08-21 12:07:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:07:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:23,318 INFO L225 Difference]: With dead ends: 172 [2021-08-21 12:07:23,318 INFO L226 Difference]: Without dead ends: 162 [2021-08-21 12:07:23,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-21 12:07:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-08-21 12:07:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-08-21 12:07:23,321 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-08-21 12:07:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-08-21 12:07:23,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-08-21 12:07:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:23,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:23,322 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:23,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 12:07:23,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:07:23,537 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash 242617322, now seen corresponding path program 45 times [2021-08-21 12:07:23,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:23,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428721070] [2021-08-21 12:07:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:23,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:23,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:23,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428721070] [2021-08-21 12:07:23,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428721070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:23,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144707140] [2021-08-21 12:07:23,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:23,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:23,582 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) [2021-08-21 12:07:23,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:07:24,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:07:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:24,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144707140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:24,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:24,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:07:24,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783445983] [2021-08-21 12:07:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:24,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:24,507 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:24,585 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-08-21 12:07:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:07:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:07:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:24,586 INFO L225 Difference]: With dead ends: 175 [2021-08-21 12:07:24,586 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:07:24,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:07:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-08-21 12:07:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-08-21 12:07:24,589 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-08-21 12:07:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:24,589 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-08-21 12:07:24,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-08-21 12:07:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:24,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:24,590 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:24,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:07:24,815 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1094075156, now seen corresponding path program 46 times [2021-08-21 12:07:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:24,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842301588] [2021-08-21 12:07:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:24,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:24,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:24,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842301588] [2021-08-21 12:07:24,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842301588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:24,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145677480] [2021-08-21 12:07:24,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:24,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:24,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:24,938 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) [2021-08-21 12:07:24,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:07:25,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:25,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:07:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:26,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 111 [2021-08-21 12:07:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:26,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145677480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:26,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:26,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:26,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101750140] [2021-08-21 12:07:26,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:26,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:26,678 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:27,142 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-08-21 12:07:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:07:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 15 [2021-08-21 12:07:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:27,143 INFO L225 Difference]: With dead ends: 162 [2021-08-21 12:07:27,143 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 12:07:27,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 12:07:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-08-21 12:07:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-08-21 12:07:27,145 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-08-21 12:07:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:27,145 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-08-21 12:07:27,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-08-21 12:07:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-08-21 12:07:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:07:27,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:27,146 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:27,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:27,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:27,369 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:27,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1336708910, now seen corresponding path program 47 times [2021-08-21 12:07:27,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:27,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098518324] [2021-08-21 12:07:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:27,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:27,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098518324] [2021-08-21 12:07:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098518324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366223340] [2021-08-21 12:07:27,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:27,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:27,413 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) [2021-08-21 12:07:27,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:07:28,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:07:28,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:07:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:28,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366223340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:28,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:28,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:07:28,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21429690] [2021-08-21 12:07:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:28,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:28,361 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:28,471 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-08-21 12:07:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:07:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:28,472 INFO L225 Difference]: With dead ends: 188 [2021-08-21 12:07:28,472 INFO L226 Difference]: Without dead ends: 188 [2021-08-21 12:07:28,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-21 12:07:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-08-21 12:07:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-08-21 12:07:28,474 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-08-21 12:07:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:28,474 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-08-21 12:07:28,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-08-21 12:07:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:28,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:28,475 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:28,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:28,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,675 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1156430691, now seen corresponding path program 48 times [2021-08-21 12:07:28,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:28,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289382022] [2021-08-21 12:07:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:28,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:28,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:28,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289382022] [2021-08-21 12:07:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289382022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:28,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804447373] [2021-08-21 12:07:28,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:28,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:28,776 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) [2021-08-21 12:07:28,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:07:29,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:07:29,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:29,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:29,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 12:07:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804447373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:30,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:30,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:30,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347583553] [2021-08-21 12:07:30,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:30,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:30,162 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:30,364 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-08-21 12:07:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:30,365 INFO L225 Difference]: With dead ends: 161 [2021-08-21 12:07:30,365 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 12:07:30,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:07:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 12:07:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-08-21 12:07:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-08-21 12:07:30,368 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-08-21 12:07:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:30,368 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-08-21 12:07:30,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-08-21 12:07:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:30,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:30,369 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:30,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 12:07:30,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:07:30,585 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1487226445, now seen corresponding path program 49 times [2021-08-21 12:07:30,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:30,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122908992] [2021-08-21 12:07:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:30,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:30,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:30,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122908992] [2021-08-21 12:07:30,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122908992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:30,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657250613] [2021-08-21 12:07:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:30,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:30,696 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) [2021-08-21 12:07:30,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:07:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:31,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:31,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:07:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657250613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:32,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:32,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:32,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871757384] [2021-08-21 12:07:32,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:32,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:32,029 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-08-21 12:07:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:32,269 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-08-21 12:07:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:07:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 12:07:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:32,270 INFO L225 Difference]: With dead ends: 174 [2021-08-21 12:07:32,270 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 12:07:32,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:07:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 12:07:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-08-21 12:07:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-08-21 12:07:32,273 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-08-21 12:07:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:32,273 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-08-21 12:07:32,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-08-21 12:07:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-08-21 12:07:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:32,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:32,274 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:32,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:32,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:32,477 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1231267757, now seen corresponding path program 50 times [2021-08-21 12:07:32,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:32,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267031509] [2021-08-21 12:07:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:32,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:32,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:32,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267031509] [2021-08-21 12:07:32,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267031509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:32,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779980232] [2021-08-21 12:07:32,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:32,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:32,522 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) [2021-08-21 12:07:32,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:07:33,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:33,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779980232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:33,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:07:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829949398] [2021-08-21 12:07:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:33,521 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:33,567 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-08-21 12:07:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:07:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:33,568 INFO L225 Difference]: With dead ends: 261 [2021-08-21 12:07:33,568 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 12:07:33,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 12:07:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-08-21 12:07:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-08-21 12:07:33,572 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-08-21 12:07:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:33,572 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-08-21 12:07:33,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-08-21 12:07:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:33,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:33,573 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:33,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:33,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 12:07:33,793 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash 967529003, now seen corresponding path program 51 times [2021-08-21 12:07:33,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:33,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738454581] [2021-08-21 12:07:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:33,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:33,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:33,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738454581] [2021-08-21 12:07:33,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738454581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:33,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727415760] [2021-08-21 12:07:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:33,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:33,900 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) [2021-08-21 12:07:33,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:07:34,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:35,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:35,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 12:07:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:35,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727415760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:35,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:35,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:35,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564623637] [2021-08-21 12:07:35,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:35,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:35,356 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:35,566 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-08-21 12:07:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:35,567 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:07:35,567 INFO L226 Difference]: Without dead ends: 168 [2021-08-21 12:07:35,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:07:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-21 12:07:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-08-21 12:07:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-08-21 12:07:35,569 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-08-21 12:07:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:35,569 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-08-21 12:07:35,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-08-21 12:07:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:35,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:35,570 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:35,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:35,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 12:07:35,770 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1647587373, now seen corresponding path program 52 times [2021-08-21 12:07:35,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:35,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314017038] [2021-08-21 12:07:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:35,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:35,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:35,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314017038] [2021-08-21 12:07:35,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314017038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:35,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475307153] [2021-08-21 12:07:35,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:35,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:35,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:35,822 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) [2021-08-21 12:07:35,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:07:36,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:36,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475307153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:36,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:36,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:07:36,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858853853] [2021-08-21 12:07:36,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:36,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:36,876 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:36,941 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-08-21 12:07:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:07:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:36,942 INFO L225 Difference]: With dead ends: 272 [2021-08-21 12:07:36,942 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 12:07:36,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 12:07:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-08-21 12:07:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-08-21 12:07:36,946 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-08-21 12:07:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:36,946 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-08-21 12:07:36,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-08-21 12:07:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:36,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:36,947 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:36,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:37,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,172 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:37,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2061620591, now seen corresponding path program 53 times [2021-08-21 12:07:37,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:37,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526919812] [2021-08-21 12:07:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:37,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:37,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:37,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526919812] [2021-08-21 12:07:37,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526919812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:37,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898392762] [2021-08-21 12:07:37,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:37,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:37,279 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) [2021-08-21 12:07:37,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:07:38,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:07:38,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:38,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:38,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 12:07:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898392762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:38,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361759299] [2021-08-21 12:07:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:38,778 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:38,957 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-08-21 12:07:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:38,958 INFO L225 Difference]: With dead ends: 152 [2021-08-21 12:07:38,958 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 12:07:38,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:07:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 12:07:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-08-21 12:07:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-08-21 12:07:38,961 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-08-21 12:07:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:38,961 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-08-21 12:07:38,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-08-21 12:07:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:38,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:38,962 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:38,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:39,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:39,173 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1553288335, now seen corresponding path program 54 times [2021-08-21 12:07:39,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:39,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106727015] [2021-08-21 12:07:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:39,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:39,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:39,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106727015] [2021-08-21 12:07:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106727015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:39,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409575084] [2021-08-21 12:07:39,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:39,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:39,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:39,231 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) [2021-08-21 12:07:39,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:07:40,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:07:40,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409575084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:40,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:40,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:07:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513465825] [2021-08-21 12:07:40,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:40,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:40,308 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:40,369 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-08-21 12:07:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:07:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:40,370 INFO L225 Difference]: With dead ends: 271 [2021-08-21 12:07:40,370 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 12:07:40,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 12:07:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-08-21 12:07:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-08-21 12:07:40,374 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-08-21 12:07:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:40,374 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-08-21 12:07:40,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-08-21 12:07:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:40,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:40,375 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:40,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 12:07:40,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:07:40,589 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1668593581, now seen corresponding path program 55 times [2021-08-21 12:07:40,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:40,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836618220] [2021-08-21 12:07:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:40,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836618220] [2021-08-21 12:07:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836618220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63071361] [2021-08-21 12:07:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:40,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:40,637 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) [2021-08-21 12:07:40,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:07:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:41,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63071361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:41,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:41,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:41,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298419442] [2021-08-21 12:07:41,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:41,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:41,728 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:41,836 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-08-21 12:07:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:41,838 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:07:41,838 INFO L226 Difference]: Without dead ends: 294 [2021-08-21 12:07:41,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-21 12:07:41,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-08-21 12:07:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-08-21 12:07:41,841 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-08-21 12:07:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:41,841 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-08-21 12:07:41,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-08-21 12:07:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:41,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:41,842 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:41,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 12:07:42,057 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1618721451, now seen corresponding path program 56 times [2021-08-21 12:07:42,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:42,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062101157] [2021-08-21 12:07:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:42,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:42,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:42,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062101157] [2021-08-21 12:07:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062101157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:42,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405345623] [2021-08-21 12:07:42,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:42,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:42,169 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) [2021-08-21 12:07:42,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:07:43,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:43,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:43,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:43,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 12:07:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:43,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405345623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:43,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:43,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:43,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36490928] [2021-08-21 12:07:43,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:43,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:43,804 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:43,951 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-08-21 12:07:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:43,952 INFO L225 Difference]: With dead ends: 156 [2021-08-21 12:07:43,952 INFO L226 Difference]: Without dead ends: 151 [2021-08-21 12:07:43,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:07:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-21 12:07:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-08-21 12:07:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-08-21 12:07:43,954 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-08-21 12:07:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:43,954 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-08-21 12:07:43,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-08-21 12:07:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:43,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:43,955 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:43,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 12:07:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:44,155 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash 809374825, now seen corresponding path program 57 times [2021-08-21 12:07:44,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:44,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020375892] [2021-08-21 12:07:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:44,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:44,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:44,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020375892] [2021-08-21 12:07:44,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020375892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:44,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265711374] [2021-08-21 12:07:44,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:44,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:44,205 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) [2021-08-21 12:07:44,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:07:45,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:45,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:07:45,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265711374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:45,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:45,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:07:45,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154668591] [2021-08-21 12:07:45,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:07:45,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:07:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:07:45,295 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:45,327 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-08-21 12:07:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:07:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:45,328 INFO L225 Difference]: With dead ends: 241 [2021-08-21 12:07:45,328 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:07:45,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:07:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-08-21 12:07:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-08-21 12:07:45,331 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-08-21 12:07:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:45,331 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-08-21 12:07:45,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-08-21 12:07:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:45,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:45,331 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:45,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:07:45,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:07:45,532 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1996187475, now seen corresponding path program 58 times [2021-08-21 12:07:45,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:45,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290606595] [2021-08-21 12:07:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:45,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:45,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290606595] [2021-08-21 12:07:45,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290606595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247968583] [2021-08-21 12:07:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:45,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:45,582 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) [2021-08-21 12:07:45,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:07:46,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:46,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:46,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247968583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:46,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:46,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:07:46,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815542638] [2021-08-21 12:07:46,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:46,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:46,674 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:46,727 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-08-21 12:07:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:07:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:46,728 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:07:46,728 INFO L226 Difference]: Without dead ends: 263 [2021-08-21 12:07:46,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-21 12:07:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-08-21 12:07:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-08-21 12:07:46,731 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-08-21 12:07:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-08-21 12:07:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-08-21 12:07:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:46,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:46,732 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:46,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:46,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:07:46,945 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1225694441, now seen corresponding path program 59 times [2021-08-21 12:07:46,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:46,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013838080] [2021-08-21 12:07:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:46,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:47,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:47,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013838080] [2021-08-21 12:07:47,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013838080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:47,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843434538] [2021-08-21 12:07:47,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:47,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:47,003 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) [2021-08-21 12:07:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:07:48,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:07:48,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:48,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:48,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843434538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:48,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:48,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421576870] [2021-08-21 12:07:48,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:48,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:48,112 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:48,199 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-08-21 12:07:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:07:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:48,200 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:07:48,200 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:07:48,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:07:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-08-21 12:07:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-08-21 12:07:48,203 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-08-21 12:07:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-08-21 12:07:48,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-08-21 12:07:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:48,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:48,204 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:48,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 12:07:48,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:48,426 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1975181267, now seen corresponding path program 60 times [2021-08-21 12:07:48,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:48,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640841741] [2021-08-21 12:07:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:48,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:48,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:48,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640841741] [2021-08-21 12:07:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640841741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254771785] [2021-08-21 12:07:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:48,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:48,478 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) [2021-08-21 12:07:48,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:07:49,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:07:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:49,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254771785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:49,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:49,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:49,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103758372] [2021-08-21 12:07:49,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:49,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:49,581 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:49,700 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-08-21 12:07:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:49,701 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:07:49,701 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 12:07:49,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 12:07:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-08-21 12:07:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-08-21 12:07:49,704 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-08-21 12:07:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:49,704 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-08-21 12:07:49,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-08-21 12:07:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:49,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:49,704 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:49,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 12:07:49,919 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:49,919 INFO L82 PathProgramCache]: Analyzing trace with hash 773749999, now seen corresponding path program 61 times [2021-08-21 12:07:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:49,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407020138] [2021-08-21 12:07:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:49,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:50,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:50,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407020138] [2021-08-21 12:07:50,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407020138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:50,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067959915] [2021-08-21 12:07:50,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:50,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:50,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:50,021 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) [2021-08-21 12:07:50,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:07:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:51,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:51,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2021-08-21 12:07:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067959915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:51,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:51,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294040158] [2021-08-21 12:07:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:51,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:51,582 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:51,790 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-08-21 12:07:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:07:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:51,791 INFO L225 Difference]: With dead ends: 184 [2021-08-21 12:07:51,791 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 12:07:51,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:07:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 12:07:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-08-21 12:07:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-08-21 12:07:51,794 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-08-21 12:07:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-08-21 12:07:51,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-08-21 12:07:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:51,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:51,794 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:51,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:07:51,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:51,995 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1540876467, now seen corresponding path program 62 times [2021-08-21 12:07:51,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:51,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918399633] [2021-08-21 12:07:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:51,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918399633] [2021-08-21 12:07:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918399633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368281270] [2021-08-21 12:07:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:52,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:52,095 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) [2021-08-21 12:07:52,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:07:53,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:53,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:07:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:53,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:07:53,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:07:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:53,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368281270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:53,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:53,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:07:53,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940883771] [2021-08-21 12:07:53,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:53,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:53,697 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-08-21 12:07:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:54,017 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-08-21 12:07:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:07:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 16 [2021-08-21 12:07:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:54,018 INFO L225 Difference]: With dead ends: 197 [2021-08-21 12:07:54,018 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 12:07:54,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:07:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 12:07:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-08-21 12:07:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-08-21 12:07:54,021 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-08-21 12:07:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:54,021 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-08-21 12:07:54,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-08-21 12:07:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-08-21 12:07:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:54,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:54,021 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:54,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:54,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:54,222 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash -35596627, now seen corresponding path program 63 times [2021-08-21 12:07:54,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:54,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143771957] [2021-08-21 12:07:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:54,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:54,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:54,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143771957] [2021-08-21 12:07:54,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143771957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:54,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427268014] [2021-08-21 12:07:54,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:54,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:54,273 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) [2021-08-21 12:07:54,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:07:55,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:55,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:55,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:55,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427268014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:55,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:55,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:07:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502573897] [2021-08-21 12:07:55,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:55,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:55,438 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:55,480 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-08-21 12:07:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:07:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:55,482 INFO L225 Difference]: With dead ends: 269 [2021-08-21 12:07:55,482 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 12:07:55,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:07:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 12:07:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-08-21 12:07:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-08-21 12:07:55,484 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-08-21 12:07:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:55,485 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-08-21 12:07:55,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-08-21 12:07:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:55,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:55,485 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:55,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 12:07:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:55,693 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1453808369, now seen corresponding path program 64 times [2021-08-21 12:07:55,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783627489] [2021-08-21 12:07:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:55,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:55,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:55,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783627489] [2021-08-21 12:07:55,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783627489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:55,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510646150] [2021-08-21 12:07:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:55,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:55,742 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) [2021-08-21 12:07:55,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:07:56,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:56,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510646150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:56,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:56,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:07:56,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662761404] [2021-08-21 12:07:56,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:07:56,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:56,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:07:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:07:56,892 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:56,939 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-08-21 12:07:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:07:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:56,940 INFO L225 Difference]: With dead ends: 244 [2021-08-21 12:07:56,940 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 12:07:56,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:07:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 12:07:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-08-21 12:07:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-08-21 12:07:56,946 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-08-21 12:07:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:56,947 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-08-21 12:07:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-08-21 12:07:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:56,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:56,947 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:56,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:57,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-21 12:07:57,169 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash 380722989, now seen corresponding path program 65 times [2021-08-21 12:07:57,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:57,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789447228] [2021-08-21 12:07:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:57,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:57,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:57,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789447228] [2021-08-21 12:07:57,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789447228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:57,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784244199] [2021-08-21 12:07:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:57,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:57,220 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) [2021-08-21 12:07:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:07:58,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:07:58,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:58,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784244199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:58,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:58,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:58,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785504627] [2021-08-21 12:07:58,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:58,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:58,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:58,401 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:58,479 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-08-21 12:07:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:07:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:07:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:58,480 INFO L225 Difference]: With dead ends: 268 [2021-08-21 12:07:58,480 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 12:07:58,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 12:07:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-08-21 12:07:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-08-21 12:07:58,484 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-08-21 12:07:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:58,484 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-08-21 12:07:58,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-08-21 12:07:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:07:58,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:58,485 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:58,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:58,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:58,701 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1474814577, now seen corresponding path program 66 times [2021-08-21 12:07:58,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:58,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641191981] [2021-08-21 12:07:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:58,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:58,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:58,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641191981] [2021-08-21 12:07:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641191981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:58,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909905613] [2021-08-21 12:07:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:58,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:58,759 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) [2021-08-21 12:07:58,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:07:59,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:07:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:07:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909905613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:59,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:59,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:59,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246753141] [2021-08-21 12:07:59,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:59,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:59,936 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:00,036 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-08-21 12:08:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:08:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:08:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:00,037 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:08:00,037 INFO L226 Difference]: Without dead ends: 237 [2021-08-21 12:08:00,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-21 12:08:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-08-21 12:08:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-08-21 12:08:00,040 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-08-21 12:08:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:00,040 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-08-21 12:08:00,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-08-21 12:08:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:08:00,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:00,042 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:00,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:00,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,262 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1031915437, now seen corresponding path program 67 times [2021-08-21 12:08:00,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:00,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498562801] [2021-08-21 12:08:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:00,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:00,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:00,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498562801] [2021-08-21 12:08:00,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498562801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:00,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304919204] [2021-08-21 12:08:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:00,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:00,315 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) [2021-08-21 12:08:00,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:08:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:08:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304919204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:01,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:01,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:01,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780520261] [2021-08-21 12:08:01,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:01,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:01,497 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:01,608 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-08-21 12:08:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:08:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:01,609 INFO L225 Difference]: With dead ends: 261 [2021-08-21 12:08:01,609 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 12:08:01,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 12:08:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-08-21 12:08:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-08-21 12:08:01,617 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-08-21 12:08:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:01,617 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-08-21 12:08:01,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-08-21 12:08:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:01,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:01,618 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:01,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:08:01,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:08:01,838 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:01,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1462987570, now seen corresponding path program 68 times [2021-08-21 12:08:01,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:01,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865225499] [2021-08-21 12:08:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:01,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:01,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:01,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865225499] [2021-08-21 12:08:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865225499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:01,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767268753] [2021-08-21 12:08:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:01,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:01,898 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) [2021-08-21 12:08:01,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:08:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:03,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767268753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:03,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:03,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:03,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564141056] [2021-08-21 12:08:03,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:03,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:03,081 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:03,229 INFO L93 Difference]: Finished difference Result 298 states and 712 transitions. [2021-08-21 12:08:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:08:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:03,230 INFO L225 Difference]: With dead ends: 298 [2021-08-21 12:08:03,230 INFO L226 Difference]: Without dead ends: 291 [2021-08-21 12:08:03,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-08-21 12:08:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 177. [2021-08-21 12:08:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.903409090909091) internal successors, (511), 176 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 511 transitions. [2021-08-21 12:08:03,234 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 511 transitions. Word has length 17 [2021-08-21 12:08:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:03,234 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 511 transitions. [2021-08-21 12:08:03,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 511 transitions. [2021-08-21 12:08:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:03,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:03,235 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:03,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 12:08:03,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 12:08:03,456 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash -745811074, now seen corresponding path program 69 times [2021-08-21 12:08:03,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:03,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699006188] [2021-08-21 12:08:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:03,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:03,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:03,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699006188] [2021-08-21 12:08:03,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699006188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:03,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009031197] [2021-08-21 12:08:03,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:03,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:03,520 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) [2021-08-21 12:08:03,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:08:04,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:04,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009031197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:04,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:04,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:04,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053506242] [2021-08-21 12:08:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:04,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:04,734 INFO L87 Difference]: Start difference. First operand 177 states and 511 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:04,830 INFO L93 Difference]: Finished difference Result 293 states and 715 transitions. [2021-08-21 12:08:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:08:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:04,832 INFO L225 Difference]: With dead ends: 293 [2021-08-21 12:08:04,832 INFO L226 Difference]: Without dead ends: 293 [2021-08-21 12:08:04,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-21 12:08:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 196. [2021-08-21 12:08:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-08-21 12:08:04,836 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-08-21 12:08:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:04,836 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-08-21 12:08:04,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-08-21 12:08:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:04,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:04,836 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:04,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:05,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:05,062 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1076606828, now seen corresponding path program 70 times [2021-08-21 12:08:05,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:05,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648074037] [2021-08-21 12:08:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:05,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:05,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:05,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648074037] [2021-08-21 12:08:05,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648074037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:05,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971573416] [2021-08-21 12:08:05,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:05,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:05,119 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) [2021-08-21 12:08:05,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:08:06,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:06,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:06,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971573416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:06,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:06,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:06,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980820985] [2021-08-21 12:08:06,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:06,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:06,335 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:06,428 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-08-21 12:08:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:06,429 INFO L225 Difference]: With dead ends: 233 [2021-08-21 12:08:06,429 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 12:08:06,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 12:08:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-08-21 12:08:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-08-21 12:08:06,433 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-08-21 12:08:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:06,433 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-08-21 12:08:06,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-08-21 12:08:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:06,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:06,434 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:06,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 12:08:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:06,659 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:06,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1641887374, now seen corresponding path program 71 times [2021-08-21 12:08:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:06,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903608986] [2021-08-21 12:08:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:06,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:06,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:06,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903608986] [2021-08-21 12:08:06,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903608986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:06,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788871034] [2021-08-21 12:08:06,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:06,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:06,715 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) [2021-08-21 12:08:06,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:08:07,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:07,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:07,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:07,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788871034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:07,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:07,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:07,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036544967] [2021-08-21 12:08:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:07,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:07,916 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:07,965 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-08-21 12:08:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:08:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:07,966 INFO L225 Difference]: With dead ends: 310 [2021-08-21 12:08:07,966 INFO L226 Difference]: Without dead ends: 310 [2021-08-21 12:08:07,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-21 12:08:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-08-21 12:08:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-08-21 12:08:07,969 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-08-21 12:08:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:07,969 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-08-21 12:08:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-08-21 12:08:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:07,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:07,970 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:07,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:08:08,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-21 12:08:08,173 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1160930252, now seen corresponding path program 72 times [2021-08-21 12:08:08,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:08,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760861270] [2021-08-21 12:08:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:08,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:08,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:08,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760861270] [2021-08-21 12:08:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760861270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:08,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657350470] [2021-08-21 12:08:08,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:08,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:08,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:08,232 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) [2021-08-21 12:08:08,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:08:09,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:08:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:09,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657350470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:09,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:09,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:09,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588207286] [2021-08-21 12:08:09,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:09,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:09,440 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:09,536 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-08-21 12:08:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:09,537 INFO L225 Difference]: With dead ends: 256 [2021-08-21 12:08:09,537 INFO L226 Difference]: Without dead ends: 252 [2021-08-21 12:08:09,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-21 12:08:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-08-21 12:08:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-08-21 12:08:09,540 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-08-21 12:08:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:09,540 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-08-21 12:08:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-08-21 12:08:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:09,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:09,541 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:09,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:08:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:09,757 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2058206990, now seen corresponding path program 73 times [2021-08-21 12:08:09,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:09,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241450592] [2021-08-21 12:08:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:09,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:09,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:09,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241450592] [2021-08-21 12:08:09,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241450592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:09,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072997791] [2021-08-21 12:08:09,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:09,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:09,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:09,808 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) [2021-08-21 12:08:09,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:08:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072997791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:11,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:11,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201942644] [2021-08-21 12:08:11,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:11,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:11,016 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:11,081 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-08-21 12:08:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:08:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:11,082 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:08:11,082 INFO L226 Difference]: Without dead ends: 333 [2021-08-21 12:08:11,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:08:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-21 12:08:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-08-21 12:08:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-08-21 12:08:11,087 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-08-21 12:08:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:11,087 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-08-21 12:08:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-08-21 12:08:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:11,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:11,088 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:11,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:11,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:11,301 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1805102996, now seen corresponding path program 74 times [2021-08-21 12:08:11,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:11,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868178173] [2021-08-21 12:08:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:11,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:11,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:11,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868178173] [2021-08-21 12:08:11,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868178173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413661627] [2021-08-21 12:08:11,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:11,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:11,361 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) [2021-08-21 12:08:11,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:08:12,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:12,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:12,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413661627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:12,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:12,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:12,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22639773] [2021-08-21 12:08:12,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:12,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:12,583 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:12,661 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-08-21 12:08:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:12,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:12,662 INFO L225 Difference]: With dead ends: 260 [2021-08-21 12:08:12,662 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 12:08:12,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 12:08:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-08-21 12:08:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-08-21 12:08:12,666 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-08-21 12:08:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:12,667 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-08-21 12:08:12,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-08-21 12:08:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:12,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:12,667 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:12,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:12,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 12:08:12,881 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2079213198, now seen corresponding path program 75 times [2021-08-21 12:08:12,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:12,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409131958] [2021-08-21 12:08:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:12,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:12,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:12,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409131958] [2021-08-21 12:08:12,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409131958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:12,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879317582] [2021-08-21 12:08:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:12,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:12,941 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) [2021-08-21 12:08:12,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:08:14,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:08:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:14,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879317582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:14,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:14,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:14,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342791610] [2021-08-21 12:08:14,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:14,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:14,189 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:14,276 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-08-21 12:08:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:08:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:14,278 INFO L225 Difference]: With dead ends: 348 [2021-08-21 12:08:14,278 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 12:08:14,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 12:08:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-08-21 12:08:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-08-21 12:08:14,281 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-08-21 12:08:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:14,281 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-08-21 12:08:14,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-08-21 12:08:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:14,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:14,282 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:14,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:08:14,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:14,482 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash -487645636, now seen corresponding path program 76 times [2021-08-21 12:08:14,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:14,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512302567] [2021-08-21 12:08:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:14,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:14,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:14,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512302567] [2021-08-21 12:08:14,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512302567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:14,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398026764] [2021-08-21 12:08:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:14,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:14,525 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) [2021-08-21 12:08:14,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:08:15,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398026764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:15,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:15,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:08:15,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375547983] [2021-08-21 12:08:15,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:08:15,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:08:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:08:15,765 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:15,836 INFO L93 Difference]: Finished difference Result 291 states and 713 transitions. [2021-08-21 12:08:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:08:15,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:15,837 INFO L225 Difference]: With dead ends: 291 [2021-08-21 12:08:15,838 INFO L226 Difference]: Without dead ends: 289 [2021-08-21 12:08:15,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:08:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-08-21 12:08:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 211. [2021-08-21 12:08:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.857142857142857) internal successors, (600), 210 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 600 transitions. [2021-08-21 12:08:15,841 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 600 transitions. Word has length 17 [2021-08-21 12:08:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:15,841 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 600 transitions. [2021-08-21 12:08:15,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 600 transitions. [2021-08-21 12:08:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:15,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:15,841 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:15,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 12:08:16,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:16,043 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:16,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:16,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2029341068, now seen corresponding path program 77 times [2021-08-21 12:08:16,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:16,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335102981] [2021-08-21 12:08:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:16,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:16,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:16,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335102981] [2021-08-21 12:08:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335102981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:16,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911039572] [2021-08-21 12:08:16,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:16,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:16,087 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) [2021-08-21 12:08:16,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:08:17,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:17,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:17,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911039572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:17,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:17,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:08:17,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657136865] [2021-08-21 12:08:17,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:08:17,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:08:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:08:17,325 INFO L87 Difference]: Start difference. First operand 211 states and 600 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:17,372 INFO L93 Difference]: Finished difference Result 338 states and 858 transitions. [2021-08-21 12:08:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:08:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:17,374 INFO L225 Difference]: With dead ends: 338 [2021-08-21 12:08:17,374 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 12:08:17,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 12:08:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 226. [2021-08-21 12:08:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-08-21 12:08:17,378 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-08-21 12:08:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:17,378 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-08-21 12:08:17,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-08-21 12:08:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:17,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:17,379 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:17,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:08:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 12:08:17,590 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1585567858, now seen corresponding path program 78 times [2021-08-21 12:08:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:17,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032348815] [2021-08-21 12:08:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:17,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:17,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:17,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032348815] [2021-08-21 12:08:17,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032348815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:17,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24233772] [2021-08-21 12:08:17,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:17,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:17,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:17,640 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) [2021-08-21 12:08:17,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:08:18,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:08:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:18,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24233772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:18,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:18,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:08:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999230402] [2021-08-21 12:08:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:08:18,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:08:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:18,878 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:18,936 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-08-21 12:08:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:08:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:18,938 INFO L225 Difference]: With dead ends: 312 [2021-08-21 12:08:18,938 INFO L226 Difference]: Without dead ends: 312 [2021-08-21 12:08:18,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:08:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-21 12:08:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-08-21 12:08:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-08-21 12:08:18,941 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-08-21 12:08:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-08-21 12:08:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-08-21 12:08:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:18,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:18,942 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:18,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:19,143 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1362203856, now seen corresponding path program 79 times [2021-08-21 12:08:19,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:19,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881068378] [2021-08-21 12:08:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:19,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:19,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:19,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881068378] [2021-08-21 12:08:19,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881068378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:19,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686861130] [2021-08-21 12:08:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:19,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:19,198 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) [2021-08-21 12:08:19,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:08:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:20,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686861130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:20,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:20,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:20,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243459310] [2021-08-21 12:08:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:20,449 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:20,550 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-08-21 12:08:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:20,551 INFO L225 Difference]: With dead ends: 311 [2021-08-21 12:08:20,551 INFO L226 Difference]: Without dead ends: 299 [2021-08-21 12:08:20,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-21 12:08:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-08-21 12:08:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-08-21 12:08:20,555 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-08-21 12:08:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:20,555 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-08-21 12:08:20,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-08-21 12:08:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:20,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:20,555 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:20,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 12:08:20,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:20,769 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1636314058, now seen corresponding path program 80 times [2021-08-21 12:08:20,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:20,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036805499] [2021-08-21 12:08:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:20,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:20,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036805499] [2021-08-21 12:08:20,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036805499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:20,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623177103] [2021-08-21 12:08:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:20,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:20,826 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) [2021-08-21 12:08:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:08:22,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:22,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623177103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:22,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:22,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382380574] [2021-08-21 12:08:22,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:22,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:22,133 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:22,218 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-08-21 12:08:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:08:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:22,219 INFO L225 Difference]: With dead ends: 338 [2021-08-21 12:08:22,219 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 12:08:22,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 12:08:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-08-21 12:08:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-08-21 12:08:22,222 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-08-21 12:08:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:22,223 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-08-21 12:08:22,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-08-21 12:08:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:22,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:22,223 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:22,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:08:22,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:22,424 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 299621580, now seen corresponding path program 81 times [2021-08-21 12:08:22,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:22,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131612860] [2021-08-21 12:08:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:22,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:22,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:22,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131612860] [2021-08-21 12:08:22,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131612860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:22,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2977791] [2021-08-21 12:08:22,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:22,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:22,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:22,479 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) [2021-08-21 12:08:22,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:08:23,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2977791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:23,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:23,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504608183] [2021-08-21 12:08:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:23,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:23,744 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:23,836 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-08-21 12:08:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:23,837 INFO L225 Difference]: With dead ends: 329 [2021-08-21 12:08:23,838 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 12:08:23,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 12:08:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-08-21 12:08:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-08-21 12:08:23,842 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-08-21 12:08:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:23,842 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-08-21 12:08:23,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-08-21 12:08:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:23,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:23,843 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:23,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:24,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-21 12:08:24,057 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1564561650, now seen corresponding path program 82 times [2021-08-21 12:08:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:24,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895695546] [2021-08-21 12:08:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:24,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:24,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:24,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895695546] [2021-08-21 12:08:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895695546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:24,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252258856] [2021-08-21 12:08:24,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:24,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:24,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:24,108 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) [2021-08-21 12:08:24,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:08:25,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:25,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:25,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252258856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:25,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:25,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:25,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650254201] [2021-08-21 12:08:25,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:25,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:25,372 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:25,511 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-08-21 12:08:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:25,513 INFO L225 Difference]: With dead ends: 375 [2021-08-21 12:08:25,513 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 12:08:25,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 12:08:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-08-21 12:08:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-08-21 12:08:25,518 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-08-21 12:08:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:25,518 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-08-21 12:08:25,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-08-21 12:08:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:25,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:25,519 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:25,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:08:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:25,733 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1332617088, now seen corresponding path program 83 times [2021-08-21 12:08:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:25,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034043426] [2021-08-21 12:08:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:25,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:25,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:25,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034043426] [2021-08-21 12:08:25,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034043426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:25,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078288638] [2021-08-21 12:08:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:25,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:25,783 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) [2021-08-21 12:08:25,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:08:27,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:27,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078288638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:27,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:27,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:08:27,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394540451] [2021-08-21 12:08:27,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:08:27,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:08:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:27,132 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:27,220 INFO L93 Difference]: Finished difference Result 341 states and 832 transitions. [2021-08-21 12:08:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:27,221 INFO L225 Difference]: With dead ends: 341 [2021-08-21 12:08:27,221 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 12:08:27,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 12:08:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 236. [2021-08-21 12:08:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.8893617021276596) internal successors, (679), 235 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 679 transitions. [2021-08-21 12:08:27,226 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 679 transitions. Word has length 17 [2021-08-21 12:08:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:27,226 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 679 transitions. [2021-08-21 12:08:27,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 679 transitions. [2021-08-21 12:08:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:27,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:27,227 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:27,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:27,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:27,441 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1184369616, now seen corresponding path program 84 times [2021-08-21 12:08:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:27,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281402257] [2021-08-21 12:08:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:27,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:27,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:27,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281402257] [2021-08-21 12:08:27,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281402257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:27,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758213197] [2021-08-21 12:08:27,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:27,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:27,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:27,496 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) [2021-08-21 12:08:27,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:08:28,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:08:28,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:28,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758213197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:28,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:28,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:08:28,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884565143] [2021-08-21 12:08:28,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:08:28,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:08:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:28,768 INFO L87 Difference]: Start difference. First operand 236 states and 679 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:28,820 INFO L93 Difference]: Finished difference Result 406 states and 1045 transitions. [2021-08-21 12:08:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:08:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:28,822 INFO L225 Difference]: With dead ends: 406 [2021-08-21 12:08:28,822 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 12:08:28,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 12:08:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 269. [2021-08-21 12:08:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-08-21 12:08:28,826 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-08-21 12:08:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:28,826 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-08-21 12:08:28,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-08-21 12:08:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:28,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:28,827 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:28,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:29,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:29,041 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1951496084, now seen corresponding path program 85 times [2021-08-21 12:08:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:29,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977036764] [2021-08-21 12:08:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:29,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:29,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:29,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977036764] [2021-08-21 12:08:29,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977036764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:29,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092723550] [2021-08-21 12:08:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:29,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:29,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:29,089 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:29,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:08:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:30,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092723550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:30,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:30,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:08:30,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952886933] [2021-08-21 12:08:30,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:08:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:08:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:30,385 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:30,478 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-08-21 12:08:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:30,479 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:08:30,479 INFO L226 Difference]: Without dead ends: 392 [2021-08-21 12:08:30,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-21 12:08:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-08-21 12:08:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-08-21 12:08:30,484 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-08-21 12:08:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:30,484 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-08-21 12:08:30,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-08-21 12:08:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:30,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:30,484 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:30,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:08:30,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:30,685 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash 375022990, now seen corresponding path program 86 times [2021-08-21 12:08:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:30,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565864823] [2021-08-21 12:08:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:30,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:30,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:30,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565864823] [2021-08-21 12:08:30,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565864823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:30,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094541235] [2021-08-21 12:08:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:30,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:30,732 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:08:31,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:32,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094541235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:32,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:32,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:08:32,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209380511] [2021-08-21 12:08:32,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:08:32,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:08:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:08:32,018 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:32,064 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-08-21 12:08:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:08:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:08:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:32,065 INFO L225 Difference]: With dead ends: 362 [2021-08-21 12:08:32,065 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:08:32,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:08:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-08-21 12:08:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-08-21 12:08:32,069 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-08-21 12:08:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-08-21 12:08:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-08-21 12:08:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:32,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:32,070 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:32,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:32,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:08:32,270 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash 517232404, now seen corresponding path program 87 times [2021-08-21 12:08:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:32,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993500074] [2021-08-21 12:08:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:32,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:32,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:32,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993500074] [2021-08-21 12:08:32,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993500074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:32,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327487055] [2021-08-21 12:08:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:32,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:32,342 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:08:33,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:33,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:33,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327487055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:33,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:33,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:33,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285117908] [2021-08-21 12:08:33,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:33,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:33,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:33,634 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:33,746 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-08-21 12:08:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:33,748 INFO L225 Difference]: With dead ends: 356 [2021-08-21 12:08:33,748 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 12:08:33,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 12:08:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-08-21 12:08:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-08-21 12:08:33,752 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-08-21 12:08:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:33,752 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-08-21 12:08:33,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-08-21 12:08:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:33,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:33,753 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:33,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:33,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 12:08:33,955 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash 791342606, now seen corresponding path program 88 times [2021-08-21 12:08:33,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:33,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907627688] [2021-08-21 12:08:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:33,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:34,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:34,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907627688] [2021-08-21 12:08:34,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907627688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:34,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063137573] [2021-08-21 12:08:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:34,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:34,011 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:34,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:08:35,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063137573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:35,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:35,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22392868] [2021-08-21 12:08:35,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:35,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:35,305 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:35,379 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-08-21 12:08:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:08:35,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:35,381 INFO L225 Difference]: With dead ends: 358 [2021-08-21 12:08:35,381 INFO L226 Difference]: Without dead ends: 358 [2021-08-21 12:08:35,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-21 12:08:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-08-21 12:08:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-08-21 12:08:35,385 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-08-21 12:08:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:35,385 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-08-21 12:08:35,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-08-21 12:08:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:35,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:35,386 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:35,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 12:08:35,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 12:08:35,586 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash -545349872, now seen corresponding path program 89 times [2021-08-21 12:08:35,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:35,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209961840] [2021-08-21 12:08:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:35,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:35,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:35,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209961840] [2021-08-21 12:08:35,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209961840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:35,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950523912] [2021-08-21 12:08:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:35,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:35,648 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:35,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:08:36,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:36,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:36,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:36,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950523912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:36,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:36,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:36,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155056844] [2021-08-21 12:08:36,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:36,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:36,965 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:37,076 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-08-21 12:08:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:08:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:37,077 INFO L225 Difference]: With dead ends: 377 [2021-08-21 12:08:37,077 INFO L226 Difference]: Without dead ends: 369 [2021-08-21 12:08:37,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-21 12:08:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-08-21 12:08:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-08-21 12:08:37,083 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-08-21 12:08:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:37,083 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-08-21 12:08:37,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-08-21 12:08:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:37,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:37,084 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:37,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:37,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:37,285 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1885434194, now seen corresponding path program 90 times [2021-08-21 12:08:37,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:37,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636740767] [2021-08-21 12:08:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:37,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:37,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:37,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636740767] [2021-08-21 12:08:37,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636740767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:37,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403434486] [2021-08-21 12:08:37,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:37,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:37,363 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:37,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:08:38,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:08:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403434486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:38,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:38,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:38,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189824397] [2021-08-21 12:08:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:38,699 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:38,824 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-08-21 12:08:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:38,825 INFO L225 Difference]: With dead ends: 370 [2021-08-21 12:08:38,825 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 12:08:38,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 12:08:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-08-21 12:08:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-08-21 12:08:38,830 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-08-21 12:08:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:38,830 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-08-21 12:08:38,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-08-21 12:08:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:38,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:38,830 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:38,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 12:08:39,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 12:08:39,031 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 874337940, now seen corresponding path program 91 times [2021-08-21 12:08:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:39,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496938483] [2021-08-21 12:08:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:39,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:39,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496938483] [2021-08-21 12:08:39,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496938483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118606456] [2021-08-21 12:08:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:39,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:39,090 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:39,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:08:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:40,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118606456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:40,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:40,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:40,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084838974] [2021-08-21 12:08:40,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:40,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:40,413 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:40,472 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-08-21 12:08:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:08:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:40,473 INFO L225 Difference]: With dead ends: 319 [2021-08-21 12:08:40,473 INFO L226 Difference]: Without dead ends: 309 [2021-08-21 12:08:40,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-21 12:08:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-08-21 12:08:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-08-21 12:08:40,477 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-08-21 12:08:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:40,477 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-08-21 12:08:40,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-08-21 12:08:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:40,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:40,478 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:40,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 12:08:40,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:40,678 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1442535054, now seen corresponding path program 92 times [2021-08-21 12:08:40,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:40,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238269643] [2021-08-21 12:08:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:40,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:40,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:40,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238269643] [2021-08-21 12:08:40,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238269643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:40,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583150898] [2021-08-21 12:08:40,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:40,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:40,758 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:08:42,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:42,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:42,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583150898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:42,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:42,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040463040] [2021-08-21 12:08:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:42,228 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:42,376 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-08-21 12:08:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:08:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:42,377 INFO L225 Difference]: With dead ends: 377 [2021-08-21 12:08:42,377 INFO L226 Difference]: Without dead ends: 377 [2021-08-21 12:08:42,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:08:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-21 12:08:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-08-21 12:08:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-08-21 12:08:42,381 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-08-21 12:08:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:42,381 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-08-21 12:08:42,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-08-21 12:08:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:42,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:42,381 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:42,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:08:42,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:08:42,582 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1756928324, now seen corresponding path program 93 times [2021-08-21 12:08:42,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:42,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160555843] [2021-08-21 12:08:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:42,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:42,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:42,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160555843] [2021-08-21 12:08:42,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160555843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963827306] [2021-08-21 12:08:42,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:42,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:42,649 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:42,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:08:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:08:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:43,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963827306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:43,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:43,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:43,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219737076] [2021-08-21 12:08:43,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:43,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:43,981 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:44,090 INFO L93 Difference]: Finished difference Result 401 states and 1007 transitions. [2021-08-21 12:08:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:44,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:44,092 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:08:44,092 INFO L226 Difference]: Without dead ends: 399 [2021-08-21 12:08:44,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-21 12:08:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 273. [2021-08-21 12:08:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0036764705882355) internal successors, (817), 272 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 817 transitions. [2021-08-21 12:08:44,097 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 817 transitions. Word has length 17 [2021-08-21 12:08:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 817 transitions. [2021-08-21 12:08:44,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 817 transitions. [2021-08-21 12:08:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:44,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:44,098 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:44,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:44,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:44,321 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash 760058380, now seen corresponding path program 94 times [2021-08-21 12:08:44,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:44,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564762238] [2021-08-21 12:08:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:44,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:44,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:44,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564762238] [2021-08-21 12:08:44,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564762238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:44,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742417512] [2021-08-21 12:08:44,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:44,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:44,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:44,382 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:44,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:08:45,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742417512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:45,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:45,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:45,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428468219] [2021-08-21 12:08:45,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:45,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:45,738 INFO L87 Difference]: Start difference. First operand 273 states and 817 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:45,793 INFO L93 Difference]: Finished difference Result 468 states and 1231 transitions. [2021-08-21 12:08:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:08:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:45,794 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:08:45,794 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:08:45,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:08:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 320. [2021-08-21 12:08:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-08-21 12:08:45,799 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-08-21 12:08:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:45,799 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-08-21 12:08:45,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-08-21 12:08:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:45,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:45,799 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:45,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:46,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 12:08:46,000 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1527184848, now seen corresponding path program 95 times [2021-08-21 12:08:46,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:46,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362672894] [2021-08-21 12:08:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:46,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:46,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:46,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362672894] [2021-08-21 12:08:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362672894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:46,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340750394] [2021-08-21 12:08:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:46,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:46,097 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:46,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:08:47,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:47,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:47,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340750394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:47,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:47,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:47,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321706513] [2021-08-21 12:08:47,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:47,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:47,475 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:47,590 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-08-21 12:08:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:47,591 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:08:47,591 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 12:08:47,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 12:08:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-08-21 12:08:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-08-21 12:08:47,595 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-08-21 12:08:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:47,595 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-08-21 12:08:47,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-08-21 12:08:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:47,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:47,596 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:47,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:08:47,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:47,799 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash -49288246, now seen corresponding path program 96 times [2021-08-21 12:08:47,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:47,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064489620] [2021-08-21 12:08:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:47,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:47,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:47,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064489620] [2021-08-21 12:08:47,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064489620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:47,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800891951] [2021-08-21 12:08:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:47,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:47,856 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:47,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:08:49,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:08:49,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:49,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800891951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:49,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:49,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:49,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392214115] [2021-08-21 12:08:49,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:49,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:49,226 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:49,295 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-08-21 12:08:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:08:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:49,296 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:08:49,296 INFO L226 Difference]: Without dead ends: 433 [2021-08-21 12:08:49,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:08:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-21 12:08:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-08-21 12:08:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-08-21 12:08:49,300 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-08-21 12:08:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:49,300 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-08-21 12:08:49,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-08-21 12:08:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:49,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:49,301 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:49,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 12:08:49,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:49,501 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:49,502 INFO L82 PathProgramCache]: Analyzing trace with hash 542840012, now seen corresponding path program 97 times [2021-08-21 12:08:49,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:49,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052030987] [2021-08-21 12:08:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:49,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:49,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:49,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052030987] [2021-08-21 12:08:49,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052030987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:49,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609015848] [2021-08-21 12:08:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:49,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:49,556 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:49,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:08:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:50,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609015848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:50,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:50,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374858860] [2021-08-21 12:08:50,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:50,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:50,898 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:50,990 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-08-21 12:08:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:50,991 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:08:50,991 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:08:50,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:08:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-08-21 12:08:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-08-21 12:08:50,995 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-08-21 12:08:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:50,995 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-08-21 12:08:50,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-08-21 12:08:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:50,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:50,996 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:51,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:08:51,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-21 12:08:51,196 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1440116750, now seen corresponding path program 98 times [2021-08-21 12:08:51,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:51,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828869715] [2021-08-21 12:08:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:51,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:51,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:51,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828869715] [2021-08-21 12:08:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828869715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:51,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178268214] [2021-08-21 12:08:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:51,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:51,277 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:51,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:08:52,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:52,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178268214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:52,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:52,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198271633] [2021-08-21 12:08:52,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:52,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:52,737 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:52,800 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-08-21 12:08:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:08:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:52,801 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:08:52,801 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 12:08:52,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 12:08:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-08-21 12:08:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-08-21 12:08:52,806 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-08-21 12:08:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:52,806 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-08-21 12:08:52,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-08-21 12:08:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:52,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:52,807 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:52,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 12:08:53,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:53,021 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 92921168, now seen corresponding path program 99 times [2021-08-21 12:08:53,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:53,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145776648] [2021-08-21 12:08:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:53,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:53,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:53,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145776648] [2021-08-21 12:08:53,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145776648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:53,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185383491] [2021-08-21 12:08:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:53,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:53,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:53,070 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:53,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:08:54,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:08:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:54,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185383491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:54,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:54,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:54,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145836440] [2021-08-21 12:08:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:54,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:54,436 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:54,549 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-08-21 12:08:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-21 12:08:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:54,551 INFO L225 Difference]: With dead ends: 452 [2021-08-21 12:08:54,551 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:08:54,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:08:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-08-21 12:08:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-08-21 12:08:54,557 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-08-21 12:08:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:54,557 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-08-21 12:08:54,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-21 12:08:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-08-21 12:08:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:54,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:54,558 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:54,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:54,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:54,773 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -969661108, now seen corresponding path program 100 times [2021-08-21 12:08:54,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:54,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728677030] [2021-08-21 12:08:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:54,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:54,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728677030] [2021-08-21 12:08:54,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728677030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733471229] [2021-08-21 12:08:54,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:54,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:54,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:54,824 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:54,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:08:56,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:56,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:56,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733471229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:56,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:56,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:56,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127655539] [2021-08-21 12:08:56,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:56,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:56,217 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:56,314 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-08-21 12:08:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:56,315 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:08:56,315 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:08:56,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:08:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-08-21 12:08:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-08-21 12:08:56,320 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-08-21 12:08:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-08-21 12:08:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-08-21 12:08:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:56,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:56,321 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:56,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 12:08:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:56,521 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1461122958, now seen corresponding path program 101 times [2021-08-21 12:08:56,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:56,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508554820] [2021-08-21 12:08:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:56,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:56,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:56,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508554820] [2021-08-21 12:08:56,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508554820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:56,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345746445] [2021-08-21 12:08:56,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:56,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:56,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:56,577 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:56,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:08:57,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:08:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345746445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:57,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:57,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:57,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720956641] [2021-08-21 12:08:57,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:57,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:57,974 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:58,076 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-08-21 12:08:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:08:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:58,077 INFO L225 Difference]: With dead ends: 419 [2021-08-21 12:08:58,077 INFO L226 Difference]: Without dead ends: 419 [2021-08-21 12:08:58,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-21 12:08:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-08-21 12:08:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-08-21 12:08:58,081 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-08-21 12:08:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-08-21 12:08:58,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-08-21 12:08:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:58,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:58,082 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:58,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:08:58,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:08:58,282 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:58,283 INFO L82 PathProgramCache]: Analyzing trace with hash 450026704, now seen corresponding path program 102 times [2021-08-21 12:08:58,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:58,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750618617] [2021-08-21 12:08:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:58,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:58,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:58,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750618617] [2021-08-21 12:08:58,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750618617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:58,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749401112] [2021-08-21 12:08:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:58,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:58,335 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:58,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:08:59,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:08:59,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:08:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:59,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749401112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:59,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:59,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:08:59,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374482389] [2021-08-21 12:08:59,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:59,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:59,728 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:59,783 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-08-21 12:08:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:08:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:59,784 INFO L225 Difference]: With dead ends: 413 [2021-08-21 12:08:59,784 INFO L226 Difference]: Without dead ends: 403 [2021-08-21 12:08:59,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-21 12:08:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-08-21 12:08:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-08-21 12:08:59,788 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-08-21 12:08:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:59,788 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-08-21 12:08:59,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:08:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-08-21 12:08:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:08:59,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:59,789 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:59,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:00,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:09:00,005 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1018223818, now seen corresponding path program 103 times [2021-08-21 12:09:00,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:00,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15055216] [2021-08-21 12:09:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:00,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:00,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:00,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15055216] [2021-08-21 12:09:00,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15055216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:00,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570545784] [2021-08-21 12:09:00,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:00,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:00,085 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:00,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:09:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:09:01,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570545784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:01,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:09:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048275650] [2021-08-21 12:09:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:09:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:09:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:09:01,544 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:01,653 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-08-21 12:09:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:09:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:09:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:01,654 INFO L225 Difference]: With dead ends: 418 [2021-08-21 12:09:01,654 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 12:09:01,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 12:09:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-08-21 12:09:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-08-21 12:09:01,658 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-08-21 12:09:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:01,658 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-08-21 12:09:01,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-08-21 12:09:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:09:01,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:01,659 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:01,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:09:01,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:09:01,859 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1510675916, now seen corresponding path program 104 times [2021-08-21 12:09:01,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573888980] [2021-08-21 12:09:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:01,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:01,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:01,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573888980] [2021-08-21 12:09:01,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573888980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:01,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868798581] [2021-08-21 12:09:01,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:01,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:01,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:01,926 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:01,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:09:03,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:09:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:03,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868798581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:03,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:03,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:09:03,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182113261] [2021-08-21 12:09:03,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:09:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:09:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:09:03,367 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:03,412 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-08-21 12:09:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:09:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:09:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:03,413 INFO L225 Difference]: With dead ends: 411 [2021-08-21 12:09:03,413 INFO L226 Difference]: Without dead ends: 399 [2021-08-21 12:09:03,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:09:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-21 12:09:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-08-21 12:09:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-08-21 12:09:03,417 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-08-21 12:09:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:03,417 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-08-21 12:09:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-08-21 12:09:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:09:03,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:03,418 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:03,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:09:03,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 12:09:03,619 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash 173252366, now seen corresponding path program 105 times [2021-08-21 12:09:03,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:03,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036438410] [2021-08-21 12:09:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:03,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:03,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:03,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036438410] [2021-08-21 12:09:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036438410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:03,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406041774] [2021-08-21 12:09:03,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:03,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:03,685 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:03,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:09:05,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:09:05,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:05,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:09:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406041774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:05,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:05,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:09:05,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041188595] [2021-08-21 12:09:05,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:09:05,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:09:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:09:05,186 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:05,298 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-08-21 12:09:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:09:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:09:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:05,300 INFO L225 Difference]: With dead ends: 476 [2021-08-21 12:09:05,300 INFO L226 Difference]: Without dead ends: 476 [2021-08-21 12:09:05,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-21 12:09:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-08-21 12:09:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-08-21 12:09:05,304 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-08-21 12:09:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-08-21 12:09:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:09:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-08-21 12:09:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:05,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:05,305 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:05,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:09:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:05,506 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1618681331, now seen corresponding path program 106 times [2021-08-21 12:09:05,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:05,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434414526] [2021-08-21 12:09:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:05,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:05,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:05,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434414526] [2021-08-21 12:09:05,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434414526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:05,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960674655] [2021-08-21 12:09:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:05,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:05,640 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:05,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:09:06,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:06,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:07,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:09:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:09,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960674655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:09,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:09,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:09:09,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44807904] [2021-08-21 12:09:09,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:09:09,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:09:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:09:09,320 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:09:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:09,627 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-08-21 12:09:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:09:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:09:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:09,629 INFO L225 Difference]: With dead ends: 425 [2021-08-21 12:09:09,629 INFO L226 Difference]: Without dead ends: 398 [2021-08-21 12:09:09,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:09:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-21 12:09:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-08-21 12:09:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-08-21 12:09:09,635 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-08-21 12:09:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:09,636 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-08-21 12:09:09,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:09:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-08-21 12:09:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:09,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:09,636 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:09,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:09,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:09,853 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1486193613, now seen corresponding path program 107 times [2021-08-21 12:09:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094499510] [2021-08-21 12:09:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:09,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:09,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094499510] [2021-08-21 12:09:09,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094499510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:09,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002911446] [2021-08-21 12:09:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:09,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:09,975 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:09,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:09:11,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:09:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:11,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:11,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:09:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:14,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002911446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:14,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:14,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:14,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171155667] [2021-08-21 12:09:14,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:14,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:14,644 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:14,892 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-08-21 12:09:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:09:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:14,894 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:09:14,894 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:09:14,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:09:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-08-21 12:09:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-08-21 12:09:14,899 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-08-21 12:09:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:14,899 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-08-21 12:09:14,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-08-21 12:09:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:14,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:14,899 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:14,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:15,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-21 12:09:15,100 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1178610163, now seen corresponding path program 108 times [2021-08-21 12:09:15,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:15,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272685722] [2021-08-21 12:09:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:15,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:15,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:15,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272685722] [2021-08-21 12:09:15,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272685722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:15,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750361886] [2021-08-21 12:09:15,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:15,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:15,230 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:15,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:09:16,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:09:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:16,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:17,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:09:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750361886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:21,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:21,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:21,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432349806] [2021-08-21 12:09:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:21,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:21,648 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:21,911 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-08-21 12:09:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:21,912 INFO L225 Difference]: With dead ends: 463 [2021-08-21 12:09:21,912 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:09:21,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:09:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-08-21 12:09:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-08-21 12:09:21,917 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-08-21 12:09:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:21,917 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-08-21 12:09:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-08-21 12:09:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:21,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:21,917 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:21,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:09:22,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:22,118 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:22,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1902513229, now seen corresponding path program 109 times [2021-08-21 12:09:22,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:22,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48225963] [2021-08-21 12:09:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:22,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:22,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:22,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48225963] [2021-08-21 12:09:22,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48225963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:22,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491782804] [2021-08-21 12:09:22,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:22,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:22,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:22,241 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:22,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:09:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:23,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:24,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:24,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:09:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491782804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:24,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:24,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:24,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065215008] [2021-08-21 12:09:24,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:24,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:24,945 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:25,237 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-08-21 12:09:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:09:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:25,239 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:09:25,239 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:09:25,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:09:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-08-21 12:09:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-08-21 12:09:25,244 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-08-21 12:09:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:25,244 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-08-21 12:09:25,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-08-21 12:09:25,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:25,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:25,245 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:25,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:09:25,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:25,445 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -762290547, now seen corresponding path program 110 times [2021-08-21 12:09:25,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:25,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461897405] [2021-08-21 12:09:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:25,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:25,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:25,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461897405] [2021-08-21 12:09:25,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461897405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:25,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135744385] [2021-08-21 12:09:25,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:25,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:25,582 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:25,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:09:27,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:27,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:27,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:09:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135744385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:30,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:30,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:30,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191880856] [2021-08-21 12:09:30,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:30,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:30,459 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:30,882 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-08-21 12:09:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:09:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:30,884 INFO L225 Difference]: With dead ends: 513 [2021-08-21 12:09:30,884 INFO L226 Difference]: Without dead ends: 494 [2021-08-21 12:09:30,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:09:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-21 12:09:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-08-21 12:09:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-08-21 12:09:30,889 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-08-21 12:09:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:30,889 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-08-21 12:09:30,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-08-21 12:09:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:30,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:30,890 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:30,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 12:09:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-21 12:09:31,117 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:31,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1625327599, now seen corresponding path program 111 times [2021-08-21 12:09:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:31,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029273571] [2021-08-21 12:09:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:31,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:31,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:31,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029273571] [2021-08-21 12:09:31,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029273571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:31,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684451101] [2021-08-21 12:09:31,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:31,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:31,252 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:31,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:09:32,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:09:32,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:32,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:33,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:33,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:09:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:36,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684451101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:36,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:36,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:36,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156341278] [2021-08-21 12:09:36,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:36,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:36,134 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:36,455 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-08-21 12:09:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:36,456 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:09:36,457 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:09:36,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:09:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:09:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-08-21 12:09:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-08-21 12:09:36,463 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-08-21 12:09:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:36,463 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-08-21 12:09:36,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-08-21 12:09:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:36,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:36,464 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:36,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 12:09:36,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:09:36,669 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1923519437, now seen corresponding path program 112 times [2021-08-21 12:09:36,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:36,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682449457] [2021-08-21 12:09:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:36,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:36,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:36,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682449457] [2021-08-21 12:09:36,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682449457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:36,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197120159] [2021-08-21 12:09:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:36,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:36,811 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:36,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:09:38,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:38,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:38,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:38,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:09:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:40,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197120159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:40,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245588528] [2021-08-21 12:09:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:40,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:40,632 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:40,958 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-08-21 12:09:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:09:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:40,960 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:09:40,960 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 12:09:40,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 12:09:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-08-21 12:09:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-08-21 12:09:40,966 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-08-21 12:09:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:40,966 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-08-21 12:09:40,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-08-21 12:09:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:40,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:40,966 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:40,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:09:41,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:09:41,167 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -741284339, now seen corresponding path program 113 times [2021-08-21 12:09:41,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:41,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652604888] [2021-08-21 12:09:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:41,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:41,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:41,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652604888] [2021-08-21 12:09:41,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652604888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:41,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084439606] [2021-08-21 12:09:41,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:41,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:41,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:41,289 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:09:42,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:09:42,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:43,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:09:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:54,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084439606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:54,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:54,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:09:54,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352029737] [2021-08-21 12:09:54,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:09:54,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:09:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:09:54,600 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:55,123 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-08-21 12:09:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:09:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:09:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:55,125 INFO L225 Difference]: With dead ends: 583 [2021-08-21 12:09:55,125 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:09:55,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:09:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:09:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-08-21 12:09:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-08-21 12:09:55,133 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-08-21 12:09:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:55,134 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-08-21 12:09:55,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:09:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-08-21 12:09:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:09:55,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:55,135 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:55,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:09:55,353 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1604321391, now seen corresponding path program 114 times [2021-08-21 12:09:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:55,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661150859] [2021-08-21 12:09:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:55,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:55,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:55,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661150859] [2021-08-21 12:09:55,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661150859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:55,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253815729] [2021-08-21 12:09:55,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:55,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:55,472 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:55,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:09:57,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:09:57,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:09:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:57,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:09:57,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253815729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:03,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:03,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:03,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448951734] [2021-08-21 12:10:03,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:03,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:03,594 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:03,998 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-08-21 12:10:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:10:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:03,999 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:10:03,999 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 12:10:03,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:10:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 12:10:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-08-21 12:10:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-08-21 12:10:04,005 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-08-21 12:10:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-08-21 12:10:04,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-08-21 12:10:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:04,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:04,006 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:04,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:04,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:04,207 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1706301069, now seen corresponding path program 115 times [2021-08-21 12:10:04,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:04,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131030286] [2021-08-21 12:10:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:04,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:04,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131030286] [2021-08-21 12:10:04,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131030286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178531283] [2021-08-21 12:10:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:04,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:04,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:04,329 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:04,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:10:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:06,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:06,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178531283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:12,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:12,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262271214] [2021-08-21 12:10:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:12,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:12,086 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:12,479 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-08-21 12:10:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:10:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:12,480 INFO L225 Difference]: With dead ends: 532 [2021-08-21 12:10:12,480 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 12:10:12,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:10:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 12:10:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-08-21 12:10:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-08-21 12:10:12,486 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-08-21 12:10:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:12,486 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-08-21 12:10:12,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-08-21 12:10:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:12,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:12,487 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:12,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 12:10:12,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:12,689 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash -643339397, now seen corresponding path program 116 times [2021-08-21 12:10:12,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:12,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487842837] [2021-08-21 12:10:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:12,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:10:12,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:12,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487842837] [2021-08-21 12:10:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487842837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:12,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317515579] [2021-08-21 12:10:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:12,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:12,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:12,824 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:12,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:10:14,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:14,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:14,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:14,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:10:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317515579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:16,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-21 12:10:16,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748960984] [2021-08-21 12:10:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:10:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:10:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:10:16,781 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:16,965 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-08-21 12:10:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:10:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:10:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:16,966 INFO L225 Difference]: With dead ends: 485 [2021-08-21 12:10:16,966 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 12:10:16,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:10:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 12:10:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-08-21 12:10:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-08-21 12:10:16,973 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-08-21 12:10:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-08-21 12:10:16,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-08-21 12:10:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:16,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:16,974 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:16,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 12:10:17,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 12:10:17,179 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash -974135151, now seen corresponding path program 117 times [2021-08-21 12:10:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:17,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270544587] [2021-08-21 12:10:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:17,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:17,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270544587] [2021-08-21 12:10:17,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270544587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166942822] [2021-08-21 12:10:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:17,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:17,292 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:17,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:10:18,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:10:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:19,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:26,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166942822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:26,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:26,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 12:10:26,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065958893] [2021-08-21 12:10:26,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:10:26,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:10:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:10:26,190 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:26,517 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-08-21 12:10:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:10:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:10:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:26,519 INFO L225 Difference]: With dead ends: 544 [2021-08-21 12:10:26,519 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 12:10:26,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:10:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 12:10:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-08-21 12:10:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-08-21 12:10:26,527 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-08-21 12:10:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:26,528 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-08-21 12:10:26,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-08-21 12:10:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:26,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:26,529 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:26,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:26,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:10:26,750 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2047220531, now seen corresponding path program 118 times [2021-08-21 12:10:26,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:26,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120390001] [2021-08-21 12:10:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:26,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:26,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:26,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120390001] [2021-08-21 12:10:26,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120390001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:26,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608278671] [2021-08-21 12:10:26,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:26,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:26,886 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:26,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:10:28,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:28,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:29,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:29,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:34,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608278671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:34,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:34,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:34,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630252140] [2021-08-21 12:10:34,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:34,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:34,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:34,621 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:35,148 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-08-21 12:10:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:10:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:35,149 INFO L225 Difference]: With dead ends: 595 [2021-08-21 12:10:35,149 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 12:10:35,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:10:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 12:10:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-08-21 12:10:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-08-21 12:10:35,156 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-08-21 12:10:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:35,156 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-08-21 12:10:35,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-08-21 12:10:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:35,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:35,157 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:35,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:35,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 12:10:35,382 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1263401929, now seen corresponding path program 119 times [2021-08-21 12:10:35,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:35,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613079330] [2021-08-21 12:10:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:35,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:35,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:35,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613079330] [2021-08-21 12:10:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613079330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:35,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119837582] [2021-08-21 12:10:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:35,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:35,506 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:35,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:10:37,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:10:37,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:37,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:37,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:37,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:40,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119837582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:40,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:40,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:40,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505523638] [2021-08-21 12:10:40,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:40,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:40,420 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:40,768 INFO L93 Difference]: Finished difference Result 523 states and 1566 transitions. [2021-08-21 12:10:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:10:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:40,769 INFO L225 Difference]: With dead ends: 523 [2021-08-21 12:10:40,769 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:10:40,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:10:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:10:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 456. [2021-08-21 12:10:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-08-21 12:10:40,774 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-08-21 12:10:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-08-21 12:10:40,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-08-21 12:10:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:40,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:40,775 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:40,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 12:10:40,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:40,976 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1720255411, now seen corresponding path program 120 times [2021-08-21 12:10:40,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:40,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799162029] [2021-08-21 12:10:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:40,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:41,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:41,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799162029] [2021-08-21 12:10:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799162029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:41,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843560755] [2021-08-21 12:10:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:41,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:41,099 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:10:42,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:10:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:43,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:43,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:10:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843560755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:43,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:43,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:43,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298938844] [2021-08-21 12:10:43,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:43,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:43,795 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:44,159 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-08-21 12:10:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:10:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:44,160 INFO L225 Difference]: With dead ends: 558 [2021-08-21 12:10:44,160 INFO L226 Difference]: Without dead ends: 540 [2021-08-21 12:10:44,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:10:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-08-21 12:10:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-08-21 12:10:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-08-21 12:10:44,166 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-08-21 12:10:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:44,166 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-08-21 12:10:44,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-08-21 12:10:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:44,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:44,167 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:44,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:10:44,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:44,369 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash -90091891, now seen corresponding path program 121 times [2021-08-21 12:10:44,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:44,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28713535] [2021-08-21 12:10:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:44,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:44,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:44,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28713535] [2021-08-21 12:10:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28713535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:44,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374084326] [2021-08-21 12:10:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:44,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:44,490 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:10:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:46,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:46,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:10:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374084326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:53,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:53,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:10:53,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072599116] [2021-08-21 12:10:53,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:10:53,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:10:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:53,470 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:54,045 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-08-21 12:10:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:10:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:10:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:54,047 INFO L225 Difference]: With dead ends: 647 [2021-08-21 12:10:54,047 INFO L226 Difference]: Without dead ends: 621 [2021-08-21 12:10:54,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:10:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-21 12:10:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-08-21 12:10:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-08-21 12:10:54,056 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-08-21 12:10:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:54,056 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-08-21 12:10:54,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:10:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-08-21 12:10:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:54,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:54,057 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:54,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:54,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-21 12:10:54,281 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash -953128943, now seen corresponding path program 122 times [2021-08-21 12:10:54,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:54,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882603365] [2021-08-21 12:10:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:54,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:54,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:54,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882603365] [2021-08-21 12:10:54,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882603365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:54,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949585187] [2021-08-21 12:10:54,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:54,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:54,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:54,415 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:54,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:10:56,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:10:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:56,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:10:56,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:10:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:58,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949585187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:58,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:58,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:10:58,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335608206] [2021-08-21 12:10:58,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:10:58,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:10:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:10:58,605 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:10:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:59,305 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-08-21 12:10:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:10:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:10:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:59,307 INFO L225 Difference]: With dead ends: 727 [2021-08-21 12:10:59,307 INFO L226 Difference]: Without dead ends: 685 [2021-08-21 12:10:59,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:10:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-21 12:10:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-08-21 12:10:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-08-21 12:10:59,317 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-08-21 12:10:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:59,317 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-08-21 12:10:59,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:10:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-08-21 12:10:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:10:59,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:59,318 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:59,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:59,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 12:10:59,533 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1937473779, now seen corresponding path program 123 times [2021-08-21 12:10:59,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:59,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669369497] [2021-08-21 12:10:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:59,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:59,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:59,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669369497] [2021-08-21 12:10:59,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669369497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:59,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841471667] [2021-08-21 12:10:59,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:59,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:59,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:59,669 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:59,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:11:01,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:11:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:01,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:01,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:11:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:08,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841471667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:08,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:08,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:11:08,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361466523] [2021-08-21 12:11:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:11:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:11:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:08,859 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:09,279 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-08-21 12:11:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:11:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:09,280 INFO L225 Difference]: With dead ends: 598 [2021-08-21 12:11:09,280 INFO L226 Difference]: Without dead ends: 588 [2021-08-21 12:11:09,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:11:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-21 12:11:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-08-21 12:11:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-08-21 12:11:09,287 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-08-21 12:11:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:09,287 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-08-21 12:11:09,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-08-21 12:11:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:09,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:09,288 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:09,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:11:09,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:11:09,488 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1907574673, now seen corresponding path program 124 times [2021-08-21 12:11:09,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:09,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28718604] [2021-08-21 12:11:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:09,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:09,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:09,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28718604] [2021-08-21 12:11:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28718604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:09,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822250574] [2021-08-21 12:11:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:09,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:09,626 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:09,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:11:11,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:11,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:11,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:11,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:11:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:17,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822250574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:17,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:17,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:11:17,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219449598] [2021-08-21 12:11:17,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:11:17,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:11:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:17,310 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:17,762 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-08-21 12:11:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:11:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:11:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:17,763 INFO L225 Difference]: With dead ends: 608 [2021-08-21 12:11:17,763 INFO L226 Difference]: Without dead ends: 598 [2021-08-21 12:11:17,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:11:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-08-21 12:11:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-08-21 12:11:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-08-21 12:11:17,769 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-08-21 12:11:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:17,769 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-08-21 12:11:17,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-08-21 12:11:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:17,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:17,770 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:17,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 12:11:17,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:11:17,971 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1488310849, now seen corresponding path program 125 times [2021-08-21 12:11:17,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:17,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459342700] [2021-08-21 12:11:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:17,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:18,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:18,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459342700] [2021-08-21 12:11:18,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459342700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:18,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551973237] [2021-08-21 12:11:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:18,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:18,077 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:11:19,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:11:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:20,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:20,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:11:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:22,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551973237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:22,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:22,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 12:11:22,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917217458] [2021-08-21 12:11:22,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:11:22,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:11:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:11:22,109 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:22,330 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-08-21 12:11:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:11:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:11:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:22,331 INFO L225 Difference]: With dead ends: 537 [2021-08-21 12:11:22,331 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 12:11:22,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:11:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 12:11:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-08-21 12:11:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-08-21 12:11:22,338 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-08-21 12:11:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-08-21 12:11:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-08-21 12:11:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:22,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:22,338 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:22,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:22,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:11:22,539 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 418430477, now seen corresponding path program 126 times [2021-08-21 12:11:22,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:22,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752137320] [2021-08-21 12:11:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:22,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:22,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:22,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752137320] [2021-08-21 12:11:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752137320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:22,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220450134] [2021-08-21 12:11:22,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:22,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:22,654 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:22,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:11:24,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:11:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:24,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:25,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:25,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:11:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220450134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:29,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:29,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:11:29,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682915011] [2021-08-21 12:11:29,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:11:29,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:11:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:11:29,993 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:30,465 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-08-21 12:11:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:11:30,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:11:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:30,466 INFO L225 Difference]: With dead ends: 618 [2021-08-21 12:11:30,466 INFO L226 Difference]: Without dead ends: 608 [2021-08-21 12:11:30,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:11:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-21 12:11:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-08-21 12:11:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-08-21 12:11:30,477 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-08-21 12:11:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:30,477 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-08-21 12:11:30,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-08-21 12:11:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:30,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:30,478 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:30,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:30,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-21 12:11:30,693 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1512522065, now seen corresponding path program 127 times [2021-08-21 12:11:30,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:30,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127189913] [2021-08-21 12:11:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:30,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:30,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:30,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127189913] [2021-08-21 12:11:30,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127189913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:30,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127150315] [2021-08-21 12:11:30,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:11:30,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:30,837 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:30,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:11:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:33,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:33,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:11:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:36,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127150315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:36,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:36,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:11:36,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101939640] [2021-08-21 12:11:36,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:11:36,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:11:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:36,041 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:36,685 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-08-21 12:11:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:11:36,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:11:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:36,686 INFO L225 Difference]: With dead ends: 681 [2021-08-21 12:11:36,686 INFO L226 Difference]: Without dead ends: 652 [2021-08-21 12:11:36,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:11:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-21 12:11:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-08-21 12:11:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-08-21 12:11:36,693 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-08-21 12:11:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:36,693 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-08-21 12:11:36,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-08-21 12:11:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:36,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:36,693 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:36,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:11:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:36,894 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1062603221, now seen corresponding path program 128 times [2021-08-21 12:11:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:36,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934488122] [2021-08-21 12:11:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:36,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:37,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:37,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934488122] [2021-08-21 12:11:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934488122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:37,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156769919] [2021-08-21 12:11:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:11:37,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:37,033 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:37,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:11:38,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:11:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:39,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:11:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:44,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156769919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:44,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:11:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767452633] [2021-08-21 12:11:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:11:44,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:11:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:11:44,050 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:44,516 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-08-21 12:11:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:11:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:44,517 INFO L225 Difference]: With dead ends: 595 [2021-08-21 12:11:44,517 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:11:44,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:11:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:11:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-08-21 12:11:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-08-21 12:11:44,523 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-08-21 12:11:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:44,523 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-08-21 12:11:44,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:11:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-08-21 12:11:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:44,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:44,524 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:44,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:11:44,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:11:44,724 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:44,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1286841293, now seen corresponding path program 129 times [2021-08-21 12:11:44,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:44,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630431004] [2021-08-21 12:11:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:44,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:44,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630431004] [2021-08-21 12:11:44,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630431004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109770686] [2021-08-21 12:11:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:44,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:44,846 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:44,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:11:46,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:11:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:47,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:47,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:11:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:47,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109770686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:47,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:47,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:11:47,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443720161] [2021-08-21 12:11:47,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:11:47,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:11:47,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:11:47,850 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:48,205 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-08-21 12:11:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:11:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:11:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:48,207 INFO L225 Difference]: With dead ends: 613 [2021-08-21 12:11:48,207 INFO L226 Difference]: Without dead ends: 597 [2021-08-21 12:11:48,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:11:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-21 12:11:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-08-21 12:11:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-08-21 12:11:48,213 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-08-21 12:11:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:48,214 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-08-21 12:11:48,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-08-21 12:11:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:48,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:48,214 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:48,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:48,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:48,415 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1377962483, now seen corresponding path program 130 times [2021-08-21 12:11:48,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:48,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929265046] [2021-08-21 12:11:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:48,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:48,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:48,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929265046] [2021-08-21 12:11:48,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929265046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:48,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443847773] [2021-08-21 12:11:48,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:48,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:48,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:48,537 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:48,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:11:50,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:50,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:50,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:11:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:55,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443847773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:55,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:55,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:11:55,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786505178] [2021-08-21 12:11:55,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:11:55,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:11:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:11:55,470 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:56,278 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-08-21 12:11:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:11:56,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:11:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:56,279 INFO L225 Difference]: With dead ends: 700 [2021-08-21 12:11:56,279 INFO L226 Difference]: Without dead ends: 676 [2021-08-21 12:11:56,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:11:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-21 12:11:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-08-21 12:11:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-08-21 12:11:56,287 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-08-21 12:11:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:56,287 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-08-21 12:11:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:11:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-08-21 12:11:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:11:56,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:56,288 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:56,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 12:11:56,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:56,501 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:56,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:56,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2053967761, now seen corresponding path program 131 times [2021-08-21 12:11:56,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:56,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769099303] [2021-08-21 12:11:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:56,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:56,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:56,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769099303] [2021-08-21 12:11:56,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769099303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:56,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148040538] [2021-08-21 12:11:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:56,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:56,632 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:56,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:11:58,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:11:58,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:58,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:11:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:59,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:11:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:08,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148040538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:08,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:08,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:12:08,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886513784] [2021-08-21 12:12:08,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:12:08,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:12:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:12:08,079 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:12:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:08,571 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-08-21 12:12:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:12:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:12:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:08,572 INFO L225 Difference]: With dead ends: 692 [2021-08-21 12:12:08,572 INFO L226 Difference]: Without dead ends: 682 [2021-08-21 12:12:08,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:12:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-21 12:12:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-08-21 12:12:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-08-21 12:12:08,579 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-08-21 12:12:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:08,579 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-08-21 12:12:08,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:12:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-08-21 12:12:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:08,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:08,580 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:08,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 12:12:08,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-08-21 12:12:08,781 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1069622925, now seen corresponding path program 132 times [2021-08-21 12:12:08,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:08,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623809141] [2021-08-21 12:12:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:08,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:08,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:08,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623809141] [2021-08-21 12:12:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623809141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:08,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177877653] [2021-08-21 12:12:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:08,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:08,919 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:08,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:12:10,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:12:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:11,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:11,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:16,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177877653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:16,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:16,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:16,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854672171] [2021-08-21 12:12:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:16,510 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:17,195 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-08-21 12:12:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:12:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:12:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:17,197 INFO L225 Difference]: With dead ends: 752 [2021-08-21 12:12:17,197 INFO L226 Difference]: Without dead ends: 730 [2021-08-21 12:12:17,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:12:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-21 12:12:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-08-21 12:12:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-08-21 12:12:17,204 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-08-21 12:12:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:17,205 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-08-21 12:12:17,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-08-21 12:12:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:17,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:17,205 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:17,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:17,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:17,406 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash 619704081, now seen corresponding path program 133 times [2021-08-21 12:12:17,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:17,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751868546] [2021-08-21 12:12:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:17,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:17,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751868546] [2021-08-21 12:12:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751868546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427743368] [2021-08-21 12:12:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:17,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:17,556 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:17,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:12:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:20,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:20,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427743368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:22,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:22,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:22,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010347348] [2021-08-21 12:12:22,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:22,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:22,025 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:22,508 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-08-21 12:12:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:12:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:22,509 INFO L225 Difference]: With dead ends: 683 [2021-08-21 12:12:22,509 INFO L226 Difference]: Without dead ends: 678 [2021-08-21 12:12:22,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:12:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-21 12:12:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-08-21 12:12:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-08-21 12:12:22,516 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-08-21 12:12:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:22,516 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-08-21 12:12:22,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-08-21 12:12:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:22,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:22,517 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:22,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:22,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:22,718 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash -442878195, now seen corresponding path program 134 times [2021-08-21 12:12:22,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:22,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296135058] [2021-08-21 12:12:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:22,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:22,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296135058] [2021-08-21 12:12:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296135058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571342860] [2021-08-21 12:12:22,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:22,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:22,850 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:22,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:12:24,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:25,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:31,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571342860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:31,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:31,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:31,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81959147] [2021-08-21 12:12:31,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:31,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:31,990 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:32,475 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-08-21 12:12:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:12:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:32,477 INFO L225 Difference]: With dead ends: 681 [2021-08-21 12:12:32,477 INFO L226 Difference]: Without dead ends: 676 [2021-08-21 12:12:32,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:12:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-21 12:12:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-08-21 12:12:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-08-21 12:12:32,484 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-08-21 12:12:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-08-21 12:12:32,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-08-21 12:12:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:32,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:32,485 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:32,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 12:12:32,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:12:32,686 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1912622085, now seen corresponding path program 135 times [2021-08-21 12:12:32,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:32,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702207180] [2021-08-21 12:12:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:32,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:32,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:32,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702207180] [2021-08-21 12:12:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702207180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:32,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547584217] [2021-08-21 12:12:32,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:32,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:32,805 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:32,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:12:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:12:34,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:35,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:12:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:36,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547584217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:36,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:36,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:12:36,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295278587] [2021-08-21 12:12:36,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:12:36,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:12:36,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:12:36,464 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:12:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:36,760 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-08-21 12:12:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:12:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:12:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:36,761 INFO L225 Difference]: With dead ends: 630 [2021-08-21 12:12:36,761 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 12:12:36,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:12:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 12:12:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-08-21 12:12:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-08-21 12:12:36,768 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-08-21 12:12:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:36,768 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-08-21 12:12:36,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:12:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-08-21 12:12:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:36,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:36,769 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:36,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:36,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:12:36,970 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 638291985, now seen corresponding path program 136 times [2021-08-21 12:12:36,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:36,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427021460] [2021-08-21 12:12:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:36,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:37,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:37,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427021460] [2021-08-21 12:12:37,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427021460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:37,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920670515] [2021-08-21 12:12:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:37,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:37,127 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:37,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:12:39,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:39,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:39,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:39,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:39,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:39,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920670515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:41,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:41,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:41,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125325577] [2021-08-21 12:12:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:41,880 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:42,540 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-08-21 12:12:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:12:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:12:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:42,541 INFO L225 Difference]: With dead ends: 747 [2021-08-21 12:12:42,541 INFO L226 Difference]: Without dead ends: 737 [2021-08-21 12:12:42,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:12:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-08-21 12:12:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-08-21 12:12:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-08-21 12:12:42,552 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-08-21 12:12:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:42,552 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-08-21 12:12:42,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-08-21 12:12:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:42,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:42,553 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:42,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:42,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 12:12:42,769 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash 195392845, now seen corresponding path program 137 times [2021-08-21 12:12:42,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:42,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136614126] [2021-08-21 12:12:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:42,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:42,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:42,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136614126] [2021-08-21 12:12:42,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136614126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:42,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982394830] [2021-08-21 12:12:42,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:42,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:42,899 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:42,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:12:45,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:12:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:45,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982394830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:51,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:51,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:51,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683881907] [2021-08-21 12:12:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:51,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:51,255 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:52,003 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-08-21 12:12:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:12:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:12:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:52,004 INFO L225 Difference]: With dead ends: 777 [2021-08-21 12:12:52,004 INFO L226 Difference]: Without dead ends: 748 [2021-08-21 12:12:52,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:12:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-21 12:12:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-08-21 12:12:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-08-21 12:12:52,012 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-08-21 12:12:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:52,012 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-08-21 12:12:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:12:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-08-21 12:12:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:12:52,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:52,013 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:52,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:52,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:52,213 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -867189431, now seen corresponding path program 138 times [2021-08-21 12:12:52,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:52,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242170806] [2021-08-21 12:12:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:52,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:52,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:52,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242170806] [2021-08-21 12:12:52,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242170806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:52,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289951551] [2021-08-21 12:12:52,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:52,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:52,344 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:52,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:12:54,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:12:54,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:12:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:55,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:12:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:12:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:59,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289951551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:59,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:12:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807898857] [2021-08-21 12:12:59,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:12:59,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:12:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:12:59,609 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:00,130 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-08-21 12:13:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:13:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:13:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:00,131 INFO L225 Difference]: With dead ends: 676 [2021-08-21 12:13:00,131 INFO L226 Difference]: Without dead ends: 671 [2021-08-21 12:13:00,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:13:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-08-21 12:13:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-08-21 12:13:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-08-21 12:13:00,139 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-08-21 12:13:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:00,139 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-08-21 12:13:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-08-21 12:13:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:00,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:00,139 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:00,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:00,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:00,340 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:00,340 INFO L82 PathProgramCache]: Analyzing trace with hash 17558605, now seen corresponding path program 139 times [2021-08-21 12:13:00,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:00,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343351414] [2021-08-21 12:13:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:00,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:00,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:00,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343351414] [2021-08-21 12:13:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343351414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:00,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809119378] [2021-08-21 12:13:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:00,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:00,462 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:00,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:13:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:02,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:03,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:03,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:13:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:05,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809119378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:05,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:05,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:13:05,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736552402] [2021-08-21 12:13:05,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:13:05,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:13:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:05,147 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:05,449 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-08-21 12:13:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:13:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:13:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:05,451 INFO L225 Difference]: With dead ends: 707 [2021-08-21 12:13:05,451 INFO L226 Difference]: Without dead ends: 691 [2021-08-21 12:13:05,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:13:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-21 12:13:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-08-21 12:13:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-08-21 12:13:05,459 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-08-21 12:13:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:05,459 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-08-21 12:13:05,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-08-21 12:13:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:05,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:05,460 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:05,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:05,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:05,661 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1647722125, now seen corresponding path program 140 times [2021-08-21 12:13:05,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:05,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486486947] [2021-08-21 12:13:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:05,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:05,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:05,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486486947] [2021-08-21 12:13:05,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486486947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:05,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212785224] [2021-08-21 12:13:05,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:05,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:05,800 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:05,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:13:08,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:08,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:08,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:13:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212785224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:11,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:11,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:13:11,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105953579] [2021-08-21 12:13:11,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:13:11,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:13:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:11,066 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:11,824 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-08-21 12:13:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:13:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:13:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:11,825 INFO L225 Difference]: With dead ends: 772 [2021-08-21 12:13:11,825 INFO L226 Difference]: Without dead ends: 762 [2021-08-21 12:13:11,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:13:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-21 12:13:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-08-21 12:13:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-08-21 12:13:11,834 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-08-21 12:13:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:11,834 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-08-21 12:13:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-08-21 12:13:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:11,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:11,835 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:11,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 12:13:12,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:12,035 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash 784685073, now seen corresponding path program 141 times [2021-08-21 12:13:12,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:12,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197287517] [2021-08-21 12:13:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:12,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:12,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:12,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197287517] [2021-08-21 12:13:12,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197287517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:12,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756392446] [2021-08-21 12:13:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:12,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:12,176 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:12,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:13:14,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:13:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:14,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:14,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:13:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:17,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756392446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:17,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:17,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:13:17,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261428208] [2021-08-21 12:13:17,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:13:17,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:13:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:17,908 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:18,577 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-08-21 12:13:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:13:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:13:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:18,579 INFO L225 Difference]: With dead ends: 788 [2021-08-21 12:13:18,579 INFO L226 Difference]: Without dead ends: 778 [2021-08-21 12:13:18,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:13:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-21 12:13:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-08-21 12:13:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-08-21 12:13:18,587 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-08-21 12:13:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:18,587 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-08-21 12:13:18,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-08-21 12:13:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:18,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:18,588 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:18,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:18,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:18,810 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -199659763, now seen corresponding path program 142 times [2021-08-21 12:13:18,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:18,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924065674] [2021-08-21 12:13:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:18,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:13:18,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:18,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924065674] [2021-08-21 12:13:18,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924065674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:18,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059172042] [2021-08-21 12:13:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:18,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:18,961 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:18,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:13:21,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:21,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:21,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:13:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:27,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059172042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:27,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:13:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825421287] [2021-08-21 12:13:27,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:13:27,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:13:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:27,372 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:27,932 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-08-21 12:13:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:13:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:13:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:27,934 INFO L225 Difference]: With dead ends: 836 [2021-08-21 12:13:27,934 INFO L226 Difference]: Without dead ends: 826 [2021-08-21 12:13:27,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:13:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-21 12:13:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-08-21 12:13:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-08-21 12:13:27,942 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-08-21 12:13:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:27,942 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-08-21 12:13:27,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:13:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-08-21 12:13:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:27,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:27,943 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:27,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:28,144 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -649578607, now seen corresponding path program 143 times [2021-08-21 12:13:28,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:28,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467891183] [2021-08-21 12:13:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:28,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:28,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467891183] [2021-08-21 12:13:28,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467891183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931638498] [2021-08-21 12:13:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:28,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:28,338 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:28,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:13:30,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:13:30,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:31,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:31,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:13:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:32,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931638498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:32,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:13:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808074813] [2021-08-21 12:13:32,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:13:32,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:13:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:13:32,892 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:33,640 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-08-21 12:13:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:13:33,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:13:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:33,642 INFO L225 Difference]: With dead ends: 890 [2021-08-21 12:13:33,642 INFO L226 Difference]: Without dead ends: 868 [2021-08-21 12:13:33,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 769.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:13:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-21 12:13:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-08-21 12:13:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-08-21 12:13:33,651 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-08-21 12:13:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:33,651 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-08-21 12:13:33,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-08-21 12:13:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:33,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:33,652 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:33,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 12:13:33,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:33,853 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1712160883, now seen corresponding path program 144 times [2021-08-21 12:13:33,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:33,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509547885] [2021-08-21 12:13:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:33,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:33,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:33,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509547885] [2021-08-21 12:13:33,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509547885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:33,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086374005] [2021-08-21 12:13:33,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:33,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:33,992 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:34,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:13:36,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:13:36,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:36,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:13:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086374005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:39,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:39,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:13:39,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213652455] [2021-08-21 12:13:39,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:13:39,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:13:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:13:39,445 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:40,034 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-08-21 12:13:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:13:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:13:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:40,035 INFO L225 Difference]: With dead ends: 803 [2021-08-21 12:13:40,036 INFO L226 Difference]: Without dead ends: 798 [2021-08-21 12:13:40,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:13:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-21 12:13:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-08-21 12:13:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-08-21 12:13:40,044 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-08-21 12:13:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:40,044 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-08-21 12:13:40,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-08-21 12:13:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:40,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:40,045 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:40,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 12:13:40,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:13:40,246 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash -292473071, now seen corresponding path program 145 times [2021-08-21 12:13:40,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:40,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773357264] [2021-08-21 12:13:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:40,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:40,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:40,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773357264] [2021-08-21 12:13:40,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773357264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:40,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441111560] [2021-08-21 12:13:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:40,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:40,379 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:13:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:43,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:13:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:49,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441111560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:49,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:49,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:13:49,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431362747] [2021-08-21 12:13:49,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:13:49,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:13:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:13:49,375 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:49,951 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-08-21 12:13:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:13:49,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:13:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:49,952 INFO L225 Difference]: With dead ends: 813 [2021-08-21 12:13:49,952 INFO L226 Difference]: Without dead ends: 808 [2021-08-21 12:13:49,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:13:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-08-21 12:13:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-08-21 12:13:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-08-21 12:13:49,960 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-08-21 12:13:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:49,961 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-08-21 12:13:49,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-08-21 12:13:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:49,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:49,962 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:49,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 12:13:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 12:13:50,164 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2113598783, now seen corresponding path program 146 times [2021-08-21 12:13:50,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:50,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761739514] [2021-08-21 12:13:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:50,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:50,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761739514] [2021-08-21 12:13:50,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761739514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:50,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624276126] [2021-08-21 12:13:50,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:50,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:50,308 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:13:52,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:52,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:53,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:53,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:13:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624276126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:55,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:13:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311338483] [2021-08-21 12:13:55,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:13:55,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:13:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:13:55,724 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:56,070 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-08-21 12:13:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:13:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:13:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:56,071 INFO L225 Difference]: With dead ends: 751 [2021-08-21 12:13:56,071 INFO L226 Difference]: Without dead ends: 733 [2021-08-21 12:13:56,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:13:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-08-21 12:13:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-08-21 12:13:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-08-21 12:13:56,079 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-08-21 12:13:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-08-21 12:13:56,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:13:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-08-21 12:13:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:13:56,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:56,080 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:56,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:13:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:56,281 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:13:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1135935859, now seen corresponding path program 147 times [2021-08-21 12:13:56,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:56,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448332641] [2021-08-21 12:13:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:56,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:56,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:56,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448332641] [2021-08-21 12:13:56,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448332641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:56,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924642762] [2021-08-21 12:13:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:56,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:56,409 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:13:56,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:13:58,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:13:58,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:58,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:13:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:59,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:13:59,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:14:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924642762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:02,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:02,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:14:02,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995917976] [2021-08-21 12:14:02,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:14:02,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:14:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:14:02,370 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:03,142 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-08-21 12:14:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:14:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:14:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:03,143 INFO L225 Difference]: With dead ends: 846 [2021-08-21 12:14:03,143 INFO L226 Difference]: Without dead ends: 836 [2021-08-21 12:14:03,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:14:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-21 12:14:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-08-21 12:14:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-08-21 12:14:03,151 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-08-21 12:14:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-08-21 12:14:03,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-08-21 12:14:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:03,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:03,153 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:03,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-21 12:14:03,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:14:03,353 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1980907311, now seen corresponding path program 148 times [2021-08-21 12:14:03,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:03,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705749603] [2021-08-21 12:14:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:03,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:03,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:03,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705749603] [2021-08-21 12:14:03,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705749603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:03,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500461292] [2021-08-21 12:14:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:03,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:03,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:03,490 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:03,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:14:06,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:06,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:06,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:06,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:14:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500461292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:13,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:14:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242572781] [2021-08-21 12:14:13,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:14:13,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:14:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:14:13,129 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:13,961 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-08-21 12:14:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:14:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:14:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:13,963 INFO L225 Difference]: With dead ends: 871 [2021-08-21 12:14:13,963 INFO L226 Difference]: Without dead ends: 856 [2021-08-21 12:14:13,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:14:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-08-21 12:14:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-08-21 12:14:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-08-21 12:14:13,971 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-08-21 12:14:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:13,971 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-08-21 12:14:13,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-08-21 12:14:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:13,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:13,972 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:13,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 12:14:14,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 12:14:14,173 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash -561219499, now seen corresponding path program 149 times [2021-08-21 12:14:14,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:14,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155551621] [2021-08-21 12:14:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:14,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:14,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:14,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155551621] [2021-08-21 12:14:14,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155551621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:14,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611968810] [2021-08-21 12:14:14,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:14,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:14,337 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:14,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:14:16,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:14:16,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:17,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:17,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:14:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:19,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611968810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:19,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:14:19,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525498401] [2021-08-21 12:14:19,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:14:19,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:14:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:14:19,485 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:20,076 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-08-21 12:14:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:14:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:14:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:20,077 INFO L225 Difference]: With dead ends: 805 [2021-08-21 12:14:20,077 INFO L226 Difference]: Without dead ends: 800 [2021-08-21 12:14:20,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:14:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-21 12:14:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-08-21 12:14:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-08-21 12:14:20,086 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-08-21 12:14:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:20,086 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-08-21 12:14:20,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:14:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-08-21 12:14:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:20,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:20,087 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:20,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:20,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-08-21 12:14:20,288 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:20,288 INFO L82 PathProgramCache]: Analyzing trace with hash -675499059, now seen corresponding path program 150 times [2021-08-21 12:14:20,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:20,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240309820] [2021-08-21 12:14:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:20,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:20,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:20,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240309820] [2021-08-21 12:14:20,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240309820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:20,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130411719] [2021-08-21 12:14:20,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:20,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:20,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:20,411 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:20,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:14:22,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:14:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:23,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 286 [2021-08-21 12:14:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130411719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:25,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:14:25,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521569418] [2021-08-21 12:14:25,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:14:25,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:14:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:25,177 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:25,536 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-08-21 12:14:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:14:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:14:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:25,537 INFO L225 Difference]: With dead ends: 817 [2021-08-21 12:14:25,537 INFO L226 Difference]: Without dead ends: 803 [2021-08-21 12:14:25,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:14:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-08-21 12:14:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-08-21 12:14:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-08-21 12:14:25,566 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-08-21 12:14:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:25,566 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-08-21 12:14:25,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-08-21 12:14:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:25,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:25,567 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:25,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:25,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,768 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash 954664461, now seen corresponding path program 151 times [2021-08-21 12:14:25,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:25,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912850203] [2021-08-21 12:14:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:25,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:25,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:25,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912850203] [2021-08-21 12:14:25,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912850203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999530865] [2021-08-21 12:14:25,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:25,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:25,895 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:25,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:14:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:28,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:28,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 283 [2021-08-21 12:14:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999530865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:38,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:38,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:14:38,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595053369] [2021-08-21 12:14:38,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:14:38,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:14:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:38,188 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:38,906 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-08-21 12:14:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:14:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:14:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:38,908 INFO L225 Difference]: With dead ends: 881 [2021-08-21 12:14:38,908 INFO L226 Difference]: Without dead ends: 871 [2021-08-21 12:14:38,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:14:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-08-21 12:14:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-08-21 12:14:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-08-21 12:14:38,918 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-08-21 12:14:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:38,919 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-08-21 12:14:38,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-08-21 12:14:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:38,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:38,920 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:38,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 12:14:39,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:39,121 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 91627409, now seen corresponding path program 152 times [2021-08-21 12:14:39,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:39,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264238806] [2021-08-21 12:14:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:39,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:39,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:39,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264238806] [2021-08-21 12:14:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264238806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:39,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932254158] [2021-08-21 12:14:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:39,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:39,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:39,247 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:39,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:14:41,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:42,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:42,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:14:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:44,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932254158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:44,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:44,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:14:44,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766592253] [2021-08-21 12:14:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:14:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:14:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:44,779 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:45,555 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-08-21 12:14:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:14:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:14:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:45,557 INFO L225 Difference]: With dead ends: 914 [2021-08-21 12:14:45,557 INFO L226 Difference]: Without dead ends: 904 [2021-08-21 12:14:45,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:14:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-08-21 12:14:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-08-21 12:14:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-08-21 12:14:45,567 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-08-21 12:14:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-08-21 12:14:45,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-08-21 12:14:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:45,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:45,568 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:45,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:45,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:45,769 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash -892717427, now seen corresponding path program 153 times [2021-08-21 12:14:45,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:45,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479243513] [2021-08-21 12:14:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:45,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:45,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:45,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479243513] [2021-08-21 12:14:45,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479243513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:45,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925913486] [2021-08-21 12:14:45,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:45,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:45,894 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:45,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:14:48,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:14:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:48,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:48,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:49,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:49,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:14:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:54,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925913486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:54,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:54,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:14:54,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867070801] [2021-08-21 12:14:54,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:14:54,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:14:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:14:54,199 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:54,932 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-08-21 12:14:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:14:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:14:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:54,934 INFO L225 Difference]: With dead ends: 960 [2021-08-21 12:14:54,934 INFO L226 Difference]: Without dead ends: 950 [2021-08-21 12:14:54,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:14:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-08-21 12:14:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-08-21 12:14:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-08-21 12:14:54,944 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-08-21 12:14:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-08-21 12:14:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:14:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-08-21 12:14:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:14:54,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:54,945 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:54,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-21 12:14:55,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:55,146 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:14:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1342636271, now seen corresponding path program 154 times [2021-08-21 12:14:55,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:55,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801612018] [2021-08-21 12:14:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:55,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:55,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:55,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801612018] [2021-08-21 12:14:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801612018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:55,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082742433] [2021-08-21 12:14:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:55,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:55,275 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:14:55,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:14:57,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:14:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:58,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:14:58,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:15:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082742433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:01,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:01,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:15:01,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081914511] [2021-08-21 12:15:01,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:15:01,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:15:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:15:01,175 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:15:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:01,837 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-08-21 12:15:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:15:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 [2021-08-21 12:15:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:01,839 INFO L225 Difference]: With dead ends: 966 [2021-08-21 12:15:01,839 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 12:15:01,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:15:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 12:15:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-08-21 12:15:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-08-21 12:15:01,849 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-08-21 12:15:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:01,849 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-08-21 12:15:01,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-08-21 12:15:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-08-21 12:15:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:15:01,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:01,851 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:01,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 12:15:02,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:02,051 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1889748749, now seen corresponding path program 155 times [2021-08-21 12:15:02,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:02,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801765889] [2021-08-21 12:15:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:02,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:02,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:02,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801765889] [2021-08-21 12:15:02,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801765889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:02,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626011386] [2021-08-21 12:15:02,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:02,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:02,227 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:02,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:15:05,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:15:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:05,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:05,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:15:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626011386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:13,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:13,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:15:13,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432861616] [2021-08-21 12:15:13,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:15:13,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:15:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:13,293 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,113 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-08-21 12:15:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:15:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:15:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:14,114 INFO L225 Difference]: With dead ends: 1010 [2021-08-21 12:15:14,114 INFO L226 Difference]: Without dead ends: 995 [2021-08-21 12:15:14,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 825.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:15:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-08-21 12:15:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-08-21 12:15:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-08-21 12:15:14,128 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-08-21 12:15:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-08-21 12:15:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-08-21 12:15:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:15:14,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:14,130 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:14,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:14,349 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash -985530735, now seen corresponding path program 156 times [2021-08-21 12:15:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947094884] [2021-08-21 12:15:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:14,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947094884] [2021-08-21 12:15:14,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947094884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:14,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212014388] [2021-08-21 12:15:14,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:14,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:14,501 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:14,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:15:17,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:15:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:15:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:17,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:15:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:23,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212014388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:23,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:23,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:15:23,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564863564] [2021-08-21 12:15:23,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:15:23,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:15:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:23,266 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:23,906 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-08-21 12:15:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:15:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:15:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:23,908 INFO L225 Difference]: With dead ends: 964 [2021-08-21 12:15:23,908 INFO L226 Difference]: Without dead ends: 959 [2021-08-21 12:15:23,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:15:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-08-21 12:15:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-08-21 12:15:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-08-21 12:15:23,918 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-08-21 12:15:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:23,918 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-08-21 12:15:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-08-21 12:15:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:15:23,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:23,919 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:23,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-21 12:15:24,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 12:15:24,120 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash 75118477, now seen corresponding path program 157 times [2021-08-21 12:15:24,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:24,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510739733] [2021-08-21 12:15:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:24,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:24,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:24,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510739733] [2021-08-21 12:15:24,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510739733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:24,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890953517] [2021-08-21 12:15:24,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:24,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:24,256 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:24,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:15:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:15:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:27,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 267 [2021-08-21 12:15:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890953517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:29,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:29,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:15:29,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434099394] [2021-08-21 12:15:29,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:15:29,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:15:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:29,357 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:30,026 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-08-21 12:15:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:15:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 [2021-08-21 12:15:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:30,027 INFO L225 Difference]: With dead ends: 980 [2021-08-21 12:15:30,027 INFO L226 Difference]: Without dead ends: 975 [2021-08-21 12:15:30,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:15:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-08-21 12:15:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-08-21 12:15:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-08-21 12:15:30,037 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-08-21 12:15:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-08-21 12:15:30,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-08-21 12:15:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-08-21 12:15:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:30,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:30,039 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:30,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-21 12:15:30,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:15:30,239 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2144746670, now seen corresponding path program 158 times [2021-08-21 12:15:30,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:30,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651146975] [2021-08-21 12:15:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:30,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:30,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:30,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651146975] [2021-08-21 12:15:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651146975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:30,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290450810] [2021-08-21 12:15:30,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:30,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:30,447 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:30,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:15:33,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:33,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:33,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:15:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:33,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:33,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:15:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:34,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290450810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:34,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:34,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:15:34,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924530004] [2021-08-21 12:15:34,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:15:34,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:34,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:15:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:34,411 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:34,702 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-08-21 12:15:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:15:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:34,703 INFO L225 Difference]: With dead ends: 905 [2021-08-21 12:15:34,703 INFO L226 Difference]: Without dead ends: 883 [2021-08-21 12:15:34,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:15:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-08-21 12:15:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-08-21 12:15:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-08-21 12:15:34,713 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-08-21 12:15:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:34,713 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-08-21 12:15:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-08-21 12:15:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:34,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:34,714 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:34,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 12:15:34,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 12:15:34,915 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:34,915 INFO L82 PathProgramCache]: Analyzing trace with hash -752985760, now seen corresponding path program 159 times [2021-08-21 12:15:34,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:34,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87702579] [2021-08-21 12:15:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:34,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:35,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87702579] [2021-08-21 12:15:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87702579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651959235] [2021-08-21 12:15:35,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:35,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:35,133 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:35,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:15:37,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:15:37,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:37,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:15:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:38,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:15:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:40,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651959235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:40,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:15:40,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057833235] [2021-08-21 12:15:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:15:40,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:15:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:40,017 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:40,463 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-08-21 12:15:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:15:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:40,465 INFO L225 Difference]: With dead ends: 899 [2021-08-21 12:15:40,465 INFO L226 Difference]: Without dead ends: 880 [2021-08-21 12:15:40,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:15:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-08-21 12:15:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-08-21 12:15:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-08-21 12:15:40,475 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-08-21 12:15:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:40,475 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-08-21 12:15:40,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-08-21 12:15:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:40,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:40,476 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:40,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:40,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-08-21 12:15:40,677 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash 954654318, now seen corresponding path program 160 times [2021-08-21 12:15:40,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:40,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585146852] [2021-08-21 12:15:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:40,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:40,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:40,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585146852] [2021-08-21 12:15:40,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585146852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15907584] [2021-08-21 12:15:40,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:40,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:40,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:40,914 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:40,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:15:43,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:43,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:43,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:15:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:44,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:15:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:45,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15907584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:45,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:45,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:15:45,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214835443] [2021-08-21 12:15:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:15:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:15:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:45,333 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:45,757 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-08-21 12:15:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:15:45,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:45,759 INFO L225 Difference]: With dead ends: 889 [2021-08-21 12:15:45,759 INFO L226 Difference]: Without dead ends: 878 [2021-08-21 12:15:45,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:15:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-21 12:15:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-08-21 12:15:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-08-21 12:15:45,768 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-08-21 12:15:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:45,769 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-08-21 12:15:45,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-08-21 12:15:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:45,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:45,770 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:45,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-21 12:15:45,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:45,970 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1710149458, now seen corresponding path program 161 times [2021-08-21 12:15:45,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:45,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134913969] [2021-08-21 12:15:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:45,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:46,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:46,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134913969] [2021-08-21 12:15:46,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134913969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:46,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940912924] [2021-08-21 12:15:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:46,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:46,189 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:46,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:15:49,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:15:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:49,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:15:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:49,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:15:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940912924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:51,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:15:51,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508512552] [2021-08-21 12:15:51,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:15:51,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:15:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:15:51,697 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,152 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-08-21 12:15:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:15:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,154 INFO L225 Difference]: With dead ends: 922 [2021-08-21 12:15:52,154 INFO L226 Difference]: Without dead ends: 910 [2021-08-21 12:15:52,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:15:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-08-21 12:15:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-08-21 12:15:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-08-21 12:15:52,164 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-08-21 12:15:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,164 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-08-21 12:15:52,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-08-21 12:15:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:52,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,165 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-21 12:15:52,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:52,366 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2138100402, now seen corresponding path program 162 times [2021-08-21 12:15:52,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873014006] [2021-08-21 12:15:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:52,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873014006] [2021-08-21 12:15:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873014006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579150669] [2021-08-21 12:15:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:52,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:52,525 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:52,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:15:55,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:15:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:55,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:15:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:55,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:15:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:15:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:58,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579150669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:58,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:58,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 12:15:58,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864557857] [2021-08-21 12:15:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:15:58,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:15:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:15:58,160 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:58,648 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-08-21 12:15:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:15:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:15:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:58,650 INFO L225 Difference]: With dead ends: 960 [2021-08-21 12:15:58,650 INFO L226 Difference]: Without dead ends: 946 [2021-08-21 12:15:58,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:15:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-21 12:15:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-08-21 12:15:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-08-21 12:15:58,660 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-08-21 12:15:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:58,660 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-08-21 12:15:58,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-08-21 12:15:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:15:58,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:58,661 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:58,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-21 12:15:58,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:58,862 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:15:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash 561627308, now seen corresponding path program 163 times [2021-08-21 12:15:58,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:58,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030517716] [2021-08-21 12:15:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:58,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:58,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:58,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030517716] [2021-08-21 12:15:58,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030517716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:58,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429612029] [2021-08-21 12:15:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:58,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:58,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:58,953 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:15:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:16:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:16:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:01,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429612029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:01,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:01,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:16:01,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023373417] [2021-08-21 12:16:01,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:16:01,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:16:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:16:01,968 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:02,031 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-08-21 12:16:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:02,033 INFO L225 Difference]: With dead ends: 1106 [2021-08-21 12:16:02,033 INFO L226 Difference]: Without dead ends: 1106 [2021-08-21 12:16:02,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:16:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-08-21 12:16:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-08-21 12:16:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-08-21 12:16:02,044 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-08-21 12:16:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:02,044 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-08-21 12:16:02,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-08-21 12:16:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:02,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:02,045 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:02,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 12:16:02,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:02,261 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1391980142, now seen corresponding path program 164 times [2021-08-21 12:16:02,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:02,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031306268] [2021-08-21 12:16:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:02,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:16:02,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:02,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031306268] [2021-08-21 12:16:02,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031306268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:02,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152309770] [2021-08-21 12:16:02,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:02,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:02,443 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:02,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:16:05,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:05,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:05,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:05,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:16:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:06,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152309770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:06,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:06,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 12:16:06,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647277972] [2021-08-21 12:16:06,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:16:06,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:16:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:06,855 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:07,270 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-08-21 12:16:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:16:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:07,272 INFO L225 Difference]: With dead ends: 911 [2021-08-21 12:16:07,272 INFO L226 Difference]: Without dead ends: 900 [2021-08-21 12:16:07,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:16:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-08-21 12:16:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-08-21 12:16:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-08-21 12:16:07,286 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-08-21 12:16:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:07,286 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-08-21 12:16:07,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-08-21 12:16:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:07,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:07,288 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:07,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 12:16:07,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,501 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1272823634, now seen corresponding path program 165 times [2021-08-21 12:16:07,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:07,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706764573] [2021-08-21 12:16:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:07,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:16:07,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:07,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706764573] [2021-08-21 12:16:07,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706764573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:07,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288781022] [2021-08-21 12:16:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:07,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:07,674 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:07,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:16:10,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:16:10,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:10,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:11,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:16:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288781022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 12:16:14,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469147402] [2021-08-21 12:16:14,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:16:14,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:16:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:14,350 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:14,790 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-08-21 12:16:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:16:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:14,792 INFO L225 Difference]: With dead ends: 946 [2021-08-21 12:16:14,792 INFO L226 Difference]: Without dead ends: 936 [2021-08-21 12:16:14,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:16:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-21 12:16:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-08-21 12:16:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-08-21 12:16:14,802 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-08-21 12:16:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:14,802 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-08-21 12:16:14,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-08-21 12:16:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:14,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:14,803 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:14,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-21 12:16:15,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:15,004 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2135860686, now seen corresponding path program 166 times [2021-08-21 12:16:15,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:15,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708926933] [2021-08-21 12:16:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:15,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:15,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:15,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708926933] [2021-08-21 12:16:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708926933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:15,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576548814] [2021-08-21 12:16:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:15,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:15,216 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:16:18,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:18,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:18,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:18,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:18,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:16:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:20,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576548814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:20,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:20,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:16:20,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816045704] [2021-08-21 12:16:20,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:16:20,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:16:20,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:20,568 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:21,189 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-08-21 12:16:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:16:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:21,191 INFO L225 Difference]: With dead ends: 1017 [2021-08-21 12:16:21,191 INFO L226 Difference]: Without dead ends: 1005 [2021-08-21 12:16:21,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:16:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-21 12:16:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-08-21 12:16:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-08-21 12:16:21,213 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-08-21 12:16:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:21,213 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-08-21 12:16:21,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-08-21 12:16:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:21,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:21,214 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:21,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:21,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 12:16:21,414 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1174761774, now seen corresponding path program 167 times [2021-08-21 12:16:21,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:21,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616710240] [2021-08-21 12:16:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:21,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:21,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:21,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616710240] [2021-08-21 12:16:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616710240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:21,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75302171] [2021-08-21 12:16:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:21,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:21,608 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:21,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:16:24,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:16:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:24,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:25,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:16:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:28,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75302171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:28,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:28,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:16:28,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286880505] [2021-08-21 12:16:28,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:16:28,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:16:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:28,982 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:29,763 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-08-21 12:16:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:16:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:29,765 INFO L225 Difference]: With dead ends: 1037 [2021-08-21 12:16:29,765 INFO L226 Difference]: Without dead ends: 1021 [2021-08-21 12:16:29,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:16:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-08-21 12:16:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-08-21 12:16:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-08-21 12:16:29,784 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-08-21 12:16:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:29,785 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-08-21 12:16:29,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-08-21 12:16:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:29,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:29,786 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:29,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-21 12:16:29,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 12:16:29,990 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2072038512, now seen corresponding path program 168 times [2021-08-21 12:16:29,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:29,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929752315] [2021-08-21 12:16:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:29,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:30,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:30,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929752315] [2021-08-21 12:16:30,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929752315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:30,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690447183] [2021-08-21 12:16:30,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:30,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:30,071 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:30,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:16:33,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:16:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:16:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:33,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690447183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:33,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:33,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:16:33,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60353062] [2021-08-21 12:16:33,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:16:33,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:16:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:16:33,246 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:33,329 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-08-21 12:16:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:33,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:33,331 INFO L225 Difference]: With dead ends: 1214 [2021-08-21 12:16:33,331 INFO L226 Difference]: Without dead ends: 1214 [2021-08-21 12:16:33,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-08-21 12:16:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-08-21 12:16:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-08-21 12:16:33,342 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-08-21 12:16:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:33,343 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-08-21 12:16:33,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-08-21 12:16:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:33,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:33,344 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:33,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-21 12:16:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 12:16:33,544 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2043172590, now seen corresponding path program 169 times [2021-08-21 12:16:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:33,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670736655] [2021-08-21 12:16:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:33,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:33,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:33,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670736655] [2021-08-21 12:16:33,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670736655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:33,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782387649] [2021-08-21 12:16:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:33,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:33,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:33,787 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:33,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:16:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:36,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:37,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:16:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782387649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:38,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:38,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:16:38,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859709461] [2021-08-21 12:16:38,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:16:38,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:16:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:38,048 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:38,532 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-08-21 12:16:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:16:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:38,534 INFO L225 Difference]: With dead ends: 956 [2021-08-21 12:16:38,534 INFO L226 Difference]: Without dead ends: 943 [2021-08-21 12:16:38,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:16:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-21 12:16:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-08-21 12:16:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-08-21 12:16:38,550 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-08-21 12:16:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:38,551 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-08-21 12:16:38,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-08-21 12:16:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:38,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:38,552 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:38,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-21 12:16:38,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:38,752 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -621631186, now seen corresponding path program 170 times [2021-08-21 12:16:38,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:38,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811723384] [2021-08-21 12:16:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:38,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:16:38,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811723384] [2021-08-21 12:16:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811723384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193451613] [2021-08-21 12:16:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:38,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:38,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:38,952 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:38,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:16:42,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:42,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:42,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:42,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:16:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:46,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193451613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:46,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:46,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 12:16:46,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591227985] [2021-08-21 12:16:46,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:16:46,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:16:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:46,390 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:46,941 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-08-21 12:16:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:16:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:46,942 INFO L225 Difference]: With dead ends: 1019 [2021-08-21 12:16:46,942 INFO L226 Difference]: Without dead ends: 1009 [2021-08-21 12:16:46,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:16:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-21 12:16:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-08-21 12:16:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-08-21 12:16:46,953 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-08-21 12:16:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:46,953 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-08-21 12:16:46,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-08-21 12:16:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:46,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:46,954 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:46,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-21 12:16:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:47,155 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:16:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1484668238, now seen corresponding path program 171 times [2021-08-21 12:16:47,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:47,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442078413] [2021-08-21 12:16:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:47,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:47,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:47,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442078413] [2021-08-21 12:16:47,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442078413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:47,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190965293] [2021-08-21 12:16:47,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:47,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:47,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:47,339 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:47,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:16:50,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:16:50,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:50,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:16:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:51,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:16:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:16:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190965293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:59,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:59,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:16:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849862042] [2021-08-21 12:16:59,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:16:59,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:16:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:59,102 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:59,848 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-08-21 12:16:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:16:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:16:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:59,850 INFO L225 Difference]: With dead ends: 1100 [2021-08-21 12:16:59,850 INFO L226 Difference]: Without dead ends: 1081 [2021-08-21 12:16:59,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:16:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-08-21 12:16:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-08-21 12:16:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-08-21 12:16:59,886 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-08-21 12:16:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:59,886 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-08-21 12:16:59,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-08-21 12:16:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:16:59,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:59,888 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:59,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:00,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-21 12:17:00,089 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1825954222, now seen corresponding path program 172 times [2021-08-21 12:17:00,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:00,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172591379] [2021-08-21 12:17:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:00,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:00,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:00,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172591379] [2021-08-21 12:17:00,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172591379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:00,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710541615] [2021-08-21 12:17:00,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:00,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:00,270 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:17:03,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:03,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:03,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:17:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710541615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:06,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:06,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:17:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922968927] [2021-08-21 12:17:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:17:06,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:17:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:06,417 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:07,174 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-08-21 12:17:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:17:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:07,177 INFO L225 Difference]: With dead ends: 1077 [2021-08-21 12:17:07,177 INFO L226 Difference]: Without dead ends: 1067 [2021-08-21 12:17:07,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:17:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-08-21 12:17:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-08-21 12:17:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-08-21 12:17:07,188 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-08-21 12:17:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:07,188 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-08-21 12:17:07,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-08-21 12:17:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:07,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:07,189 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:07,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:07,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 12:17:07,390 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1376035378, now seen corresponding path program 173 times [2021-08-21 12:17:07,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:07,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114739865] [2021-08-21 12:17:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:07,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:07,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:07,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114739865] [2021-08-21 12:17:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114739865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:07,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501606569] [2021-08-21 12:17:07,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:07,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:07,612 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:07,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:17:10,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:17:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:10,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:11,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:17:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501606569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:13,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:13,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:17:13,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501104837] [2021-08-21 12:17:13,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:17:13,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:17:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:13,882 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,555 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-08-21 12:17:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:17:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,557 INFO L225 Difference]: With dead ends: 1009 [2021-08-21 12:17:14,557 INFO L226 Difference]: Without dead ends: 999 [2021-08-21 12:17:14,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:17:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-08-21 12:17:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-08-21 12:17:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-08-21 12:17:14,570 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-08-21 12:17:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,570 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-08-21 12:17:14,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-08-21 12:17:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:14,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,572 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:14,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:14,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:14,785 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1650145580, now seen corresponding path program 174 times [2021-08-21 12:17:14,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420104969] [2021-08-21 12:17:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420104969] [2021-08-21 12:17:14,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420104969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:14,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581777466] [2021-08-21 12:17:14,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:14,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:14,853 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:14,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:17:18,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:17:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:17:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581777466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:18,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:18,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:17:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903137890] [2021-08-21 12:17:18,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:17:18,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:17:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:18,185 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:18,294 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-08-21 12:17:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:17:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:18,297 INFO L225 Difference]: With dead ends: 1576 [2021-08-21 12:17:18,297 INFO L226 Difference]: Without dead ends: 1576 [2021-08-21 12:17:18,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-08-21 12:17:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-08-21 12:17:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-08-21 12:17:18,313 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-08-21 12:17:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:18,313 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-08-21 12:17:18,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-08-21 12:17:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:18,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:18,315 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:18,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 12:17:18,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,515 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash 755301998, now seen corresponding path program 175 times [2021-08-21 12:17:18,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880775933] [2021-08-21 12:17:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880775933] [2021-08-21 12:17:18,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880775933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:18,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419633035] [2021-08-21 12:17:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:18,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:18,763 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:18,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:17:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:22,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:22,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-21 12:17:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419633035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:23,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:23,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:17:23,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719625520] [2021-08-21 12:17:23,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:17:23,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:17:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:23,490 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:23,961 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-08-21 12:17:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:17:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:23,963 INFO L225 Difference]: With dead ends: 1300 [2021-08-21 12:17:23,963 INFO L226 Difference]: Without dead ends: 1287 [2021-08-21 12:17:23,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:17:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-08-21 12:17:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-08-21 12:17:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-08-21 12:17:23,978 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-08-21 12:17:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-08-21 12:17:23,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-08-21 12:17:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:23,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:23,980 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:24,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-21 12:17:24,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:24,193 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1909501778, now seen corresponding path program 176 times [2021-08-21 12:17:24,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:24,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78716198] [2021-08-21 12:17:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:24,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:24,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:24,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78716198] [2021-08-21 12:17:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78716198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:24,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932934065] [2021-08-21 12:17:24,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:24,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:24,364 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:24,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:17:27,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:27,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:27,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:28,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:28,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:17:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:33,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932934065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:33,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:33,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 12:17:33,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075990133] [2021-08-21 12:17:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:17:33,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:17:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:33,713 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:34,360 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-08-21 12:17:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:17:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:34,363 INFO L225 Difference]: With dead ends: 1377 [2021-08-21 12:17:34,363 INFO L226 Difference]: Without dead ends: 1365 [2021-08-21 12:17:34,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:17:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-21 12:17:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-08-21 12:17:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-08-21 12:17:34,377 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-08-21 12:17:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:34,378 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-08-21 12:17:34,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-08-21 12:17:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:34,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:34,380 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:34,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:34,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:34,597 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1522428466, now seen corresponding path program 177 times [2021-08-21 12:17:34,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:34,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501878175] [2021-08-21 12:17:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:34,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:34,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501878175] [2021-08-21 12:17:34,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501878175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91360754] [2021-08-21 12:17:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:34,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:34,774 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:17:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:17:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:38,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:38,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:17:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91360754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:40,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:40,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:17:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061744509] [2021-08-21 12:17:40,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:17:40,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:17:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:40,805 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,444 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-08-21 12:17:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:17:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,447 INFO L225 Difference]: With dead ends: 1437 [2021-08-21 12:17:41,447 INFO L226 Difference]: Without dead ends: 1427 [2021-08-21 12:17:41,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:17:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-08-21 12:17:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-08-21 12:17:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-08-21 12:17:41,463 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-08-21 12:17:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,463 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-08-21 12:17:41,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-08-21 12:17:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:41,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,465 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:41,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-21 12:17:41,666 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash 538083630, now seen corresponding path program 178 times [2021-08-21 12:17:41,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331963116] [2021-08-21 12:17:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331963116] [2021-08-21 12:17:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331963116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832093361] [2021-08-21 12:17:41,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:41,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:41,927 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:41,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:17:45,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:45,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:45,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:45,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:45,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:17:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832093361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:50,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:50,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:17:50,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210187408] [2021-08-21 12:17:50,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:17:50,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:17:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:50,002 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,760 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-08-21 12:17:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:17:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,762 INFO L225 Difference]: With dead ends: 1415 [2021-08-21 12:17:50,762 INFO L226 Difference]: Without dead ends: 1403 [2021-08-21 12:17:50,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:17:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-08-21 12:17:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-08-21 12:17:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-08-21 12:17:50,777 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-08-21 12:17:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,777 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-08-21 12:17:50,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-08-21 12:17:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:50,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,779 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:50,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:50,979 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1435360368, now seen corresponding path program 179 times [2021-08-21 12:17:50,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85311645] [2021-08-21 12:17:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85311645] [2021-08-21 12:17:51,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85311645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:51,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180718074] [2021-08-21 12:17:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:51,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:51,047 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:51,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:17:54,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:17:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:17:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:54,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180718074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:54,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:54,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:17:54,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684091061] [2021-08-21 12:17:54,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:17:54,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:17:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:54,475 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:54,553 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-08-21 12:17:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:17:54,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:17:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:54,555 INFO L225 Difference]: With dead ends: 1610 [2021-08-21 12:17:54,555 INFO L226 Difference]: Without dead ends: 1610 [2021-08-21 12:17:54,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-08-21 12:17:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-08-21 12:17:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-08-21 12:17:54,571 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-08-21 12:17:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-08-21 12:17:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-08-21 12:17:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:54,573 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:54,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:54,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 12:17:54,777 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:17:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash 88164786, now seen corresponding path program 180 times [2021-08-21 12:17:54,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:54,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998319885] [2021-08-21 12:17:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:54,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:54,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:54,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998319885] [2021-08-21 12:17:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998319885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:54,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411770276] [2021-08-21 12:17:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:54,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:54,951 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:54,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:17:58,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:17:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:58,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:17:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:58,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:17:58,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:18:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:02,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411770276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:02,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:02,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:18:02,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23968635] [2021-08-21 12:18:02,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:18:02,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:18:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:02,089 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:02,720 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-08-21 12:18:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:18:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:18:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:02,722 INFO L225 Difference]: With dead ends: 1317 [2021-08-21 12:18:02,722 INFO L226 Difference]: Without dead ends: 1307 [2021-08-21 12:18:02,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 673.3ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:18:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-08-21 12:18:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-08-21 12:18:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-08-21 12:18:02,740 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-08-21 12:18:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:02,741 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-08-21 12:18:02,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-08-21 12:18:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:02,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:02,743 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:02,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-21 12:18:02,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:02,956 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:18:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 362274988, now seen corresponding path program 181 times [2021-08-21 12:18:02,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:02,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747193766] [2021-08-21 12:18:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:02,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:03,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:03,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747193766] [2021-08-21 12:18:03,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747193766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:03,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230658907] [2021-08-21 12:18:03,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:03,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:03,028 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:03,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:18:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:18:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:06,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230658907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:06,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:06,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:18:06,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374000878] [2021-08-21 12:18:06,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:18:06,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:18:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:18:06,516 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:06,622 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-08-21 12:18:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:18:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:18:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:06,625 INFO L225 Difference]: With dead ends: 2061 [2021-08-21 12:18:06,625 INFO L226 Difference]: Without dead ends: 2061 [2021-08-21 12:18:06,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-08-21 12:18:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-08-21 12:18:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-08-21 12:18:06,649 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-08-21 12:18:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:06,649 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-08-21 12:18:06,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-08-21 12:18:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:06,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:06,651 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:06,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-21 12:18:06,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:06,852 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:18:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash -974417490, now seen corresponding path program 182 times [2021-08-21 12:18:06,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:06,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633876742] [2021-08-21 12:18:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:06,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:07,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633876742] [2021-08-21 12:18:07,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633876742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:07,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129972220] [2021-08-21 12:18:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:07,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:07,027 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:07,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:18:10,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:10,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:10,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:18:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:11,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:18:11,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 264 [2021-08-21 12:18:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129972220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:13,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:13,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:18:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370786589] [2021-08-21 12:18:13,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:18:13,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:18:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:13,354 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:13,980 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-08-21 12:18:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:18:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:18:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:13,983 INFO L225 Difference]: With dead ends: 1866 [2021-08-21 12:18:13,983 INFO L226 Difference]: Without dead ends: 1856 [2021-08-21 12:18:13,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:18:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-08-21 12:18:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-08-21 12:18:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-08-21 12:18:14,006 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-08-21 12:18:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-08-21 12:18:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-08-21 12:18:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:14,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:14,008 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:14,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-21 12:18:14,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:14,208 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:18:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1456366576, now seen corresponding path program 183 times [2021-08-21 12:18:14,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:14,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146411517] [2021-08-21 12:18:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:14,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:14,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:14,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146411517] [2021-08-21 12:18:14,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146411517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:14,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965315421] [2021-08-21 12:18:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:14,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:14,284 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:14,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:18:17,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:18:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:18:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:17,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965315421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:17,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:17,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:18:17,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67252145] [2021-08-21 12:18:17,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:18:17,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:18:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:18:17,802 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:17,943 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-08-21 12:18:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:18:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:18:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:17,946 INFO L225 Difference]: With dead ends: 2380 [2021-08-21 12:18:17,946 INFO L226 Difference]: Without dead ends: 2380 [2021-08-21 12:18:17,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-21 12:18:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-08-21 12:18:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-08-21 12:18:17,972 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-08-21 12:18:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:17,972 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-08-21 12:18:17,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-08-21 12:18:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:17,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:17,974 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:17,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 12:18:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:18,174 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:18:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:18,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1850805916, now seen corresponding path program 184 times [2021-08-21 12:18:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:18,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408283808] [2021-08-21 12:18:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:18,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:18:18,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:18,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408283808] [2021-08-21 12:18:18,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408283808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:18,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979672613] [2021-08-21 12:18:18,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:18,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:18,342 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:18,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:18:19,540 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 [2021-08-21 12:18:19,548 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:18:20,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:18:20,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:20,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 12:18:20,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:20,761 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 7,while executing Executor. [2021-08-21 12:18:20,762 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:18:20,762 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:18:20,766 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:18:20,766 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:18:20,767 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:18:20 BasicIcfg [2021-08-21 12:18:20,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:18:20,768 INFO L168 Benchmark]: Toolchain (without parser) took 729547.89 ms. Allocated memory was 188.7 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 169.2 MB in the beginning and 1.1 GB in the end (delta: -960.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 12:18:20,768 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:18:20,768 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.96 ms. Allocated memory is still 188.7 MB. Free memory was 169.2 MB in the beginning and 167.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:18:20,768 INFO L168 Benchmark]: Boogie Preprocessor took 13.12 ms. Allocated memory is still 188.7 MB. Free memory was 167.7 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:18:20,769 INFO L168 Benchmark]: RCFGBuilder took 349.18 ms. Allocated memory is still 188.7 MB. Free memory was 166.6 MB in the beginning and 149.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-21 12:18:20,769 INFO L168 Benchmark]: TraceAbstraction took 729157.46 ms. Allocated memory was 188.7 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 148.6 MB in the beginning and 1.1 GB in the end (delta: -980.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 12:18:20,769 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 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.96 ms. Allocated memory is still 188.7 MB. Free memory was 169.2 MB in the beginning and 167.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.12 ms. Allocated memory is still 188.7 MB. Free memory was 167.7 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.18 ms. Allocated memory is still 188.7 MB. Free memory was 166.6 MB in the beginning and 149.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 729157.46 ms. Allocated memory was 188.7 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 148.6 MB in the beginning and 1.1 GB in the end (delta: -980.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 7,while executing Executor. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 7,while executing Executor. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 7,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 729039.4ms, OverallIterations: 196, TraceHistogramMax: 7, EmptinessCheckTime: 152.0ms, AutomataDifference: 55867.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3840 SDtfs, 7649 SDslu, 28704 SDs, 0 SdLazy, 59231 SolverSat, 5768 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24939.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6314 GetRequests, 2115 SyntacticMatches, 63 SemanticMatches, 4136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24423 ImplicationChecksByTransitivity, 51257.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2051occurred in iteration=195, InterpolantAutomatonStates: 3480, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1205.7ms AutomataMinimizationTime, 195 MinimizatonAttempts, 15382 StatesRemovedByMinimization, 192 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 557.4ms SsaConstructionTime, 2449.7ms SatisfiabilityAnalysisTime, 345771.4ms InterpolantComputationTime, 6380 NumberOfCodeBlocks, 6380 NumberOfCodeBlocksAsserted, 705 NumberOfCheckSat, 5994 ConstructedInterpolants, 0 QuantifiedInterpolants, 65940 SizeOfPredicates, 351 NumberOfNonLiveVariables, 12211 ConjunctsInSsa, 4615 ConjunctsInUnsatCore, 386 InterpolantComputations, 4 PerfectInterpolantSequences, 885/6997 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