/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:09:42,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:09:42,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:09:43,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:09:43,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:09:43,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:09:43,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:09:43,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:09:43,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:09:43,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:09:43,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:09:43,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-21 18:09:43,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:09:43,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:09:43,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:09:43,087 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-Delay.epf [2021-08-21 18:09:43,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:09:43,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:09:43,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:09:43,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:09:43,126 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:09:43,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:09:43,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:09:43,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:09:43,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:09:43,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:09:43,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:09:43,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:09:43,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:09:43,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:09:43,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:09:43,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:09:43,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:09:43,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:09:43,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:09:43,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:09:43,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:09:43,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:09:43,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:09:43,131 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:09:43,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:09:43,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:09:43,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:09:43,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:09:43,517 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:09:43,520 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:09:43,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-08-21 18:09:43,522 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-08-21 18:09:43,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:09:43,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:09:43,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:09:43,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:09:43,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:09:43,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:09:43,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:09:43,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:09:43,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:09:43,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:09:43,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:09:43,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:09:43,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:09:43,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/1) ... [2021-08-21 18:09:43,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:09:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:43,643 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 18:09:43,663 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 18:09:43,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:09:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:09:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:09:43,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:09:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:09:43,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:09:43,689 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:09:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:09:43,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:09:43,689 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:09:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:09:43,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:09:43,690 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 18:09:43,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:09:43,960 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:09:43,962 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:43 BoogieIcfgContainer [2021-08-21 18:09:43,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:09:43,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:09:43,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:09:43,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:09:43,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:43" (1/2) ... [2021-08-21 18:09:43,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cd6953 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:43, skipping insertion in model container [2021-08-21 18:09:43,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:43" (2/2) ... [2021-08-21 18:09:43,969 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-08-21 18:09:43,973 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:09:43,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:09:43,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:09:43,973 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:09:44,005 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:09:44,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:09:44,048 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 18:09:44,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:09:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 91 states have (on average 2.021978021978022) internal successors, (184), 131 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:09:44,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:44,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:44,172 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1798569311, now seen corresponding path program 1 times [2021-08-21 18:09:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:44,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454498838] [2021-08-21 18:09:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:44,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:44,301 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 18:09:44,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:44,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454498838] [2021-08-21 18:09:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454498838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:09:44,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:09:44,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:09:44,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779332753] [2021-08-21 18:09:44,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:09:44,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:09:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:44,320 INFO L87 Difference]: Start difference. First operand has 132 states, 91 states have (on average 2.021978021978022) internal successors, (184), 131 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 18:09:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:44,351 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2021-08-21 18:09:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:09:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:09:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:44,360 INFO L225 Difference]: With dead ends: 172 [2021-08-21 18:09:44,360 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:09:44,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:09:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-21 18:09:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2021-08-21 18:09:44,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 19 [2021-08-21 18:09:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:44,393 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2021-08-21 18:09:44,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 18:09:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2021-08-21 18:09:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:09:44,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:44,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:44,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:09:44,395 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1404113307, now seen corresponding path program 2 times [2021-08-21 18:09:44,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:44,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448301660] [2021-08-21 18:09:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:44,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:44,444 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 18:09:44,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:44,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448301660] [2021-08-21 18:09:44,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448301660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:09:44,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:09:44,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:09:44,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144575179] [2021-08-21 18:09:44,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:09:44,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:09:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:09:44,448 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 18:09:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:44,502 INFO L93 Difference]: Finished difference Result 108 states and 158 transitions. [2021-08-21 18:09:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:09:44,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:09:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:44,505 INFO L225 Difference]: With dead ends: 108 [2021-08-21 18:09:44,506 INFO L226 Difference]: Without dead ends: 88 [2021-08-21 18:09:44,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:09:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-21 18:09:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-08-21 18:09:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 81 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 123 transitions. [2021-08-21 18:09:44,516 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 123 transitions. Word has length 19 [2021-08-21 18:09:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 123 transitions. [2021-08-21 18:09:44,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 18:09:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 123 transitions. [2021-08-21 18:09:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:09:44,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:44,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:09:44,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1364646154, now seen corresponding path program 1 times [2021-08-21 18:09:44,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:44,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489888867] [2021-08-21 18:09:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:44,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:44,549 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 18:09:44,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:44,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489888867] [2021-08-21 18:09:44,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489888867] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:09:44,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:09:44,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:09:44,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176907719] [2021-08-21 18:09:44,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:09:44,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:09:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:44,552 INFO L87 Difference]: Start difference. First operand 82 states and 123 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:44,558 INFO L93 Difference]: Finished difference Result 96 states and 139 transitions. [2021-08-21 18:09:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:09:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:09:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:44,560 INFO L225 Difference]: With dead ends: 96 [2021-08-21 18:09:44,560 INFO L226 Difference]: Without dead ends: 88 [2021-08-21 18:09:44,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-21 18:09:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-21 18:09:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 86 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 130 transitions. [2021-08-21 18:09:44,568 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 130 transitions. Word has length 22 [2021-08-21 18:09:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:44,568 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 130 transitions. [2021-08-21 18:09:44,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 130 transitions. [2021-08-21 18:09:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:09:44,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:44,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:44,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:09:44,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1641446814, now seen corresponding path program 1 times [2021-08-21 18:09:44,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:44,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71166609] [2021-08-21 18:09:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:44,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:44,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71166609] [2021-08-21 18:09:44,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71166609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296943456] [2021-08-21 18:09:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:44,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:44,721 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 18:09:44,746 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 18:09:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:09:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:45,184 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 18:09:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:45,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296943456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:45,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:45,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:09:45,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739730500] [2021-08-21 18:09:45,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:09:45,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:09:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:09:45,308 INFO L87 Difference]: Start difference. First operand 87 states and 130 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 18:09:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:45,601 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2021-08-21 18:09:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:09:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 18:09:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:45,607 INFO L225 Difference]: With dead ends: 177 [2021-08-21 18:09:45,607 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 18:09:45,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:09:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 18:09:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2021-08-21 18:09:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.481818181818182) internal successors, (163), 110 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 163 transitions. [2021-08-21 18:09:45,631 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 163 transitions. Word has length 25 [2021-08-21 18:09:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 163 transitions. [2021-08-21 18:09:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 18:09:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 163 transitions. [2021-08-21 18:09:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:09:45,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:45,633 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:45,669 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 18:09:45,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:45,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 478308333, now seen corresponding path program 2 times [2021-08-21 18:09:45,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:45,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502757198] [2021-08-21 18:09:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:45,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:45,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:45,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502757198] [2021-08-21 18:09:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502757198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:45,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933176405] [2021-08-21 18:09:45,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:45,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:45,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:45,949 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 18:09:45,951 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 18:09:46,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:46,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:09:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933176405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:46,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:46,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:09:46,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647363624] [2021-08-21 18:09:46,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:09:46,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:09:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:09:46,180 INFO L87 Difference]: Start difference. First operand 111 states and 163 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:46,202 INFO L93 Difference]: Finished difference Result 271 states and 389 transitions. [2021-08-21 18:09:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:09:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:09:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:46,204 INFO L225 Difference]: With dead ends: 271 [2021-08-21 18:09:46,204 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 18:09:46,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:09:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 18:09:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-08-21 18:09:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.5401069518716577) internal successors, (288), 187 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 288 transitions. [2021-08-21 18:09:46,230 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 288 transitions. Word has length 28 [2021-08-21 18:09:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:46,231 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 288 transitions. [2021-08-21 18:09:46,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 288 transitions. [2021-08-21 18:09:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:09:46,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:46,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:46,259 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 18:09:46,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:46,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash 806793029, now seen corresponding path program 3 times [2021-08-21 18:09:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:46,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082878590] [2021-08-21 18:09:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:46,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:46,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082878590] [2021-08-21 18:09:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082878590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:46,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83432325] [2021-08-21 18:09:46,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:09:46,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:46,753 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 18:09:46,779 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 18:09:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:09:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:09:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:47,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:09:47,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 18:09:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83432325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:47,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:47,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 18:09:47,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732554217] [2021-08-21 18:09:47,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:09:47,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:09:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:09:47,521 INFO L87 Difference]: Start difference. First operand 188 states and 288 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:48,301 INFO L93 Difference]: Finished difference Result 343 states and 503 transitions. [2021-08-21 18:09:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:09:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:09:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:48,304 INFO L225 Difference]: With dead ends: 343 [2021-08-21 18:09:48,305 INFO L226 Difference]: Without dead ends: 317 [2021-08-21 18:09:48,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:09:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-21 18:09:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 212. [2021-08-21 18:09:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5213270142180095) internal successors, (321), 211 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2021-08-21 18:09:48,329 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 31 [2021-08-21 18:09:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:48,329 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2021-08-21 18:09:48,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2021-08-21 18:09:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:09:48,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:48,331 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:48,358 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 18:09:48,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:48,532 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1314120487, now seen corresponding path program 4 times [2021-08-21 18:09:48,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:48,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656690786] [2021-08-21 18:09:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:48,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:48,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:48,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656690786] [2021-08-21 18:09:48,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656690786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:48,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888201678] [2021-08-21 18:09:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:09:48,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:48,787 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 18:09:48,787 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 18:09:48,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:09:48,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:09:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:49,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:09:49,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 18:09:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:49,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888201678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:49,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:49,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 18:09:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345501974] [2021-08-21 18:09:49,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:09:49,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:09:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:09:49,438 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:50,316 INFO L93 Difference]: Finished difference Result 407 states and 607 transitions. [2021-08-21 18:09:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:09:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:09:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:50,321 INFO L225 Difference]: With dead ends: 407 [2021-08-21 18:09:50,321 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 18:09:50,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:09:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 18:09:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 224. [2021-08-21 18:09:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5246636771300448) internal successors, (340), 223 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 340 transitions. [2021-08-21 18:09:50,343 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 340 transitions. Word has length 31 [2021-08-21 18:09:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:50,343 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 340 transitions. [2021-08-21 18:09:50,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 340 transitions. [2021-08-21 18:09:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:09:50,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:50,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:50,380 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 18:09:50,577 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 18:09:50,578 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1825010339, now seen corresponding path program 5 times [2021-08-21 18:09:50,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:50,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58559718] [2021-08-21 18:09:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:50,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:09:50,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:50,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58559718] [2021-08-21 18:09:50,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58559718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:50,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318087308] [2021-08-21 18:09:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:50,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:50,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:50,824 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 18:09:50,857 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 18:09:50,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:09:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:09:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:51,666 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:09:51,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 31 [2021-08-21 18:09:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318087308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:51,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:09:51,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899933633] [2021-08-21 18:09:51,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:09:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:09:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:09:51,764 INFO L87 Difference]: Start difference. First operand 224 states and 340 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:53,849 INFO L93 Difference]: Finished difference Result 856 states and 1300 transitions. [2021-08-21 18:09:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:09:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:09:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:53,854 INFO L225 Difference]: With dead ends: 856 [2021-08-21 18:09:53,854 INFO L226 Difference]: Without dead ends: 666 [2021-08-21 18:09:53,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 1690.7ms TimeCoverageRelationStatistics Valid=1039, Invalid=4511, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:09:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-21 18:09:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 238. [2021-08-21 18:09:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.5358649789029535) internal successors, (364), 237 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 364 transitions. [2021-08-21 18:09:53,866 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 364 transitions. Word has length 31 [2021-08-21 18:09:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:53,867 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 364 transitions. [2021-08-21 18:09:53,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 364 transitions. [2021-08-21 18:09:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:09:53,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:53,870 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:53,899 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 18:09:54,094 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 18:09:54,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -590885087, now seen corresponding path program 6 times [2021-08-21 18:09:54,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:54,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652110689] [2021-08-21 18:09:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:54,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:09:54,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:54,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652110689] [2021-08-21 18:09:54,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652110689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:54,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339807895] [2021-08-21 18:09:54,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:09:54,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:54,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:54,337 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 18:09:54,339 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 18:09:54,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:09:54,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:09:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:54,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:09:54,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 18:09:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:55,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339807895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:55,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:55,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:09:55,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812004573] [2021-08-21 18:09:55,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:09:55,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:09:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:09:55,082 INFO L87 Difference]: Start difference. First operand 238 states and 364 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:56,112 INFO L93 Difference]: Finished difference Result 718 states and 1084 transitions. [2021-08-21 18:09:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:09:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:09:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:56,115 INFO L225 Difference]: With dead ends: 718 [2021-08-21 18:09:56,115 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 18:09:56,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=604, Invalid=2702, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:09:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 18:09:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 262. [2021-08-21 18:09:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5172413793103448) internal successors, (396), 261 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 396 transitions. [2021-08-21 18:09:56,127 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 396 transitions. Word has length 31 [2021-08-21 18:09:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 396 transitions. [2021-08-21 18:09:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 396 transitions. [2021-08-21 18:09:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:09:56,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:56,129 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:56,147 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 18:09:56,344 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 18:09:56,345 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1143149526, now seen corresponding path program 7 times [2021-08-21 18:09:56,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:56,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176056793] [2021-08-21 18:09:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:56,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:56,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:56,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176056793] [2021-08-21 18:09:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176056793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:56,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15742903] [2021-08-21 18:09:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:09:56,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:56,417 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 18:09:56,418 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 18:09:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:09:56,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15742903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:56,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:56,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:09:56,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102667493] [2021-08-21 18:09:56,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:09:56,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:09:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:09:56,740 INFO L87 Difference]: Start difference. First operand 262 states and 396 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:56,751 INFO L93 Difference]: Finished difference Result 543 states and 801 transitions. [2021-08-21 18:09:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:09:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:09:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:56,753 INFO L225 Difference]: With dead ends: 543 [2021-08-21 18:09:56,753 INFO L226 Difference]: Without dead ends: 511 [2021-08-21 18:09:56,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:09:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-21 18:09:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 351. [2021-08-21 18:09:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.5342857142857143) internal successors, (537), 350 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 537 transitions. [2021-08-21 18:09:56,762 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 537 transitions. Word has length 34 [2021-08-21 18:09:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 537 transitions. [2021-08-21 18:09:56,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 537 transitions. [2021-08-21 18:09:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:09:56,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:56,763 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:56,791 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 18:09:56,984 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 18:09:56,985 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:09:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -637251198, now seen corresponding path program 8 times [2021-08-21 18:09:56,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:56,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293160687] [2021-08-21 18:09:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:56,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:57,319 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 18:09:57,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:57,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293160687] [2021-08-21 18:09:57,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293160687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:57,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527413253] [2021-08-21 18:09:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:57,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:57,323 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 18:09:57,324 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 18:09:57,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:57,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:57,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:09:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:58,279 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:09:58,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:09:58,389 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 18:09:58,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527413253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:58,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:58,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 18:09:58,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048773193] [2021-08-21 18:09:58,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:09:58,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:58,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:09:58,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:09:58,391 INFO L87 Difference]: Start difference. First operand 351 states and 537 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 18:10:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:01,077 INFO L93 Difference]: Finished difference Result 1570 states and 2373 transitions. [2021-08-21 18:10:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:10:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:01,082 INFO L225 Difference]: With dead ends: 1570 [2021-08-21 18:10:01,082 INFO L226 Difference]: Without dead ends: 1377 [2021-08-21 18:10:01,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 2277.8ms TimeCoverageRelationStatistics Valid=1260, Invalid=7296, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 18:10:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-08-21 18:10:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 417. [2021-08-21 18:10:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.5528846153846154) internal successors, (646), 416 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 646 transitions. [2021-08-21 18:10:01,100 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 646 transitions. Word has length 37 [2021-08-21 18:10:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:01,100 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 646 transitions. [2021-08-21 18:10:01,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 18:10:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 646 transitions. [2021-08-21 18:10:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:01,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:01,101 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:01,129 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 18:10:01,325 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 18:10:01,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 666138882, now seen corresponding path program 9 times [2021-08-21 18:10:01,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:01,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790427984] [2021-08-21 18:10:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:01,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,674 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 18:10:01,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:01,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790427984] [2021-08-21 18:10:01,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790427984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:01,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894262001] [2021-08-21 18:10:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:01,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:01,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:01,681 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 18:10:01,708 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 18:10:01,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:10:01,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:10:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:02,794 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:02,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:02,915 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 18:10:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894262001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:02,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 18:10:02,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696936739] [2021-08-21 18:10:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:10:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:10:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:02,917 INFO L87 Difference]: Start difference. First operand 417 states and 646 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 18:10:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:04,853 INFO L93 Difference]: Finished difference Result 1339 states and 1991 transitions. [2021-08-21 18:10:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:10:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:04,858 INFO L225 Difference]: With dead ends: 1339 [2021-08-21 18:10:04,858 INFO L226 Difference]: Without dead ends: 1272 [2021-08-21 18:10:04,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1817.2ms TimeCoverageRelationStatistics Valid=909, Invalid=5253, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:10:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-21 18:10:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 429. [2021-08-21 18:10:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.5420560747663552) internal successors, (660), 428 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 660 transitions. [2021-08-21 18:10:04,873 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 660 transitions. Word has length 37 [2021-08-21 18:10:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:04,874 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 660 transitions. [2021-08-21 18:10:04,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 18:10:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 660 transitions. [2021-08-21 18:10:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:04,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:04,875 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:04,901 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 18:10:05,100 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 18:10:05,101 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash -63398806, now seen corresponding path program 10 times [2021-08-21 18:10:05,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:05,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592208379] [2021-08-21 18:10:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:05,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:05,401 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 18:10:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592208379] [2021-08-21 18:10:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592208379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94033813] [2021-08-21 18:10:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:05,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:05,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:05,405 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 18:10:05,431 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 18:10:05,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:06,446 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:06,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:06,543 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 18:10:06,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94033813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:06,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:06,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 18:10:06,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137967313] [2021-08-21 18:10:06,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:10:06,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:10:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:06,545 INFO L87 Difference]: Start difference. First operand 429 states and 660 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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 18:10:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:10,992 INFO L93 Difference]: Finished difference Result 2301 states and 3466 transitions. [2021-08-21 18:10:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 18:10:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:10,998 INFO L225 Difference]: With dead ends: 2301 [2021-08-21 18:10:10,998 INFO L226 Difference]: Without dead ends: 1902 [2021-08-21 18:10:11,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 3553.8ms TimeCoverageRelationStatistics Valid=2420, Invalid=12586, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 18:10:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-08-21 18:10:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 439. [2021-08-21 18:10:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2021-08-21 18:10:11,017 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 37 [2021-08-21 18:10:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:11,017 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2021-08-21 18:10:11,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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 18:10:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2021-08-21 18:10:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:11,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:11,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:11,044 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 18:10:11,235 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 18:10:11,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash 445263666, now seen corresponding path program 11 times [2021-08-21 18:10:11,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:11,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347232394] [2021-08-21 18:10:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:11,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:11,507 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 18:10:11,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:11,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347232394] [2021-08-21 18:10:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347232394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:11,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909415072] [2021-08-21 18:10:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:11,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:11,509 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 18:10:11,510 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 18:10:11,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:10:11,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:12,555 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:12,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:12,667 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 18:10:12,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909415072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:12,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:12,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 18:10:12,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752258658] [2021-08-21 18:10:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:10:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:10:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:12,669 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 18:10:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:15,030 INFO L93 Difference]: Finished difference Result 1599 states and 2358 transitions. [2021-08-21 18:10:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:10:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:15,035 INFO L225 Difference]: With dead ends: 1599 [2021-08-21 18:10:15,035 INFO L226 Difference]: Without dead ends: 1532 [2021-08-21 18:10:15,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 2177.0ms TimeCoverageRelationStatistics Valid=1441, Invalid=8459, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 18:10:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-08-21 18:10:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 473. [2021-08-21 18:10:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5635593220338984) internal successors, (738), 472 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 738 transitions. [2021-08-21 18:10:15,051 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 738 transitions. Word has length 37 [2021-08-21 18:10:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:15,051 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 738 transitions. [2021-08-21 18:10:15,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 18:10:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 738 transitions. [2021-08-21 18:10:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:15,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:15,053 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:15,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 18:10:15,268 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 18:10:15,269 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -281863996, now seen corresponding path program 12 times [2021-08-21 18:10:15,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:15,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111703851] [2021-08-21 18:10:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:15,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:15,549 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 18:10:15,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111703851] [2021-08-21 18:10:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111703851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162148904] [2021-08-21 18:10:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:15,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:15,550 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 18:10:15,551 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 18:10:15,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:10:15,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:10:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:16,676 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:16,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:16,787 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 18:10:16,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162148904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:16,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 18:10:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323577313] [2021-08-21 18:10:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:16,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:16,789 INFO L87 Difference]: Start difference. First operand 473 states and 738 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 18:10:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:19,891 INFO L93 Difference]: Finished difference Result 2058 states and 3065 transitions. [2021-08-21 18:10:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-21 18:10:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:19,896 INFO L225 Difference]: With dead ends: 2058 [2021-08-21 18:10:19,896 INFO L226 Difference]: Without dead ends: 1813 [2021-08-21 18:10:19,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4909 ImplicationChecksByTransitivity, 2603.2ms TimeCoverageRelationStatistics Valid=1917, Invalid=11655, Unknown=0, NotChecked=0, Total=13572 [2021-08-21 18:10:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-08-21 18:10:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 505. [2021-08-21 18:10:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5773809523809523) internal successors, (795), 504 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 795 transitions. [2021-08-21 18:10:19,912 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 795 transitions. Word has length 37 [2021-08-21 18:10:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 795 transitions. [2021-08-21 18:10:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 18:10:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 795 transitions. [2021-08-21 18:10:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:19,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:19,913 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:19,941 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 18:10:20,137 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 18:10:20,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -555748350, now seen corresponding path program 13 times [2021-08-21 18:10:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:20,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159485650] [2021-08-21 18:10:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:20,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:20,396 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 18:10:20,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159485650] [2021-08-21 18:10:20,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159485650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248579417] [2021-08-21 18:10:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:20,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:20,401 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 18:10:20,428 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 18:10:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:21,583 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:21,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:21,669 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 18:10:21,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248579417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:21,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:21,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 18:10:21,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590565788] [2021-08-21 18:10:21,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:21,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:21,670 INFO L87 Difference]: Start difference. First operand 505 states and 795 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 18:10:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:23,953 INFO L93 Difference]: Finished difference Result 1984 states and 3041 transitions. [2021-08-21 18:10:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 18:10:23,953 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:23,960 INFO L225 Difference]: With dead ends: 1984 [2021-08-21 18:10:23,960 INFO L226 Difference]: Without dead ends: 1710 [2021-08-21 18:10:23,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 1876.9ms TimeCoverageRelationStatistics Valid=1275, Invalid=7845, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 18:10:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-08-21 18:10:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 539. [2021-08-21 18:10:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.587360594795539) internal successors, (854), 538 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 854 transitions. [2021-08-21 18:10:23,974 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 854 transitions. Word has length 37 [2021-08-21 18:10:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:23,974 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 854 transitions. [2021-08-21 18:10:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 18:10:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 854 transitions. [2021-08-21 18:10:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:23,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:23,976 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:24,007 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 18:10:24,192 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 18:10:24,193 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 818107516, now seen corresponding path program 14 times [2021-08-21 18:10:24,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:24,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863911824] [2021-08-21 18:10:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:24,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:10:24,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:24,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863911824] [2021-08-21 18:10:24,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863911824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:24,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021156062] [2021-08-21 18:10:24,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:24,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:24,423 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 18:10:24,424 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 18:10:24,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:24,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:25,553 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:25,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:25,648 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 18:10:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021156062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:25,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:25,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-08-21 18:10:25,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244681085] [2021-08-21 18:10:25,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:10:25,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:10:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:10:25,650 INFO L87 Difference]: Start difference. First operand 539 states and 854 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:27,833 INFO L93 Difference]: Finished difference Result 2134 states and 3152 transitions. [2021-08-21 18:10:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:10:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:27,838 INFO L225 Difference]: With dead ends: 2134 [2021-08-21 18:10:27,838 INFO L226 Difference]: Without dead ends: 2008 [2021-08-21 18:10:27,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 1924.8ms TimeCoverageRelationStatistics Valid=1181, Invalid=6829, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:10:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-21 18:10:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 613. [2021-08-21 18:10:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.5751633986928104) internal successors, (964), 612 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 964 transitions. [2021-08-21 18:10:27,866 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 964 transitions. Word has length 37 [2021-08-21 18:10:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 964 transitions. [2021-08-21 18:10:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 964 transitions. [2021-08-21 18:10:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:27,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:27,868 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:27,896 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 18:10:28,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:28,081 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -579570600, now seen corresponding path program 15 times [2021-08-21 18:10:28,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:28,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495093316] [2021-08-21 18:10:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:28,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:28,337 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 18:10:28,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495093316] [2021-08-21 18:10:28,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495093316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:28,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45565945] [2021-08-21 18:10:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:28,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:28,338 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 18:10:28,339 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 18:10:28,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:10:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:29,545 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:29,659 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 18:10:29,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45565945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:29,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:29,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-08-21 18:10:29,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26006680] [2021-08-21 18:10:29,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:10:29,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:10:29,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:10:29,661 INFO L87 Difference]: Start difference. First operand 613 states and 964 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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 18:10:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:32,139 INFO L93 Difference]: Finished difference Result 2045 states and 3136 transitions. [2021-08-21 18:10:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 18:10:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:32,144 INFO L225 Difference]: With dead ends: 2045 [2021-08-21 18:10:32,144 INFO L226 Difference]: Without dead ends: 1795 [2021-08-21 18:10:32,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 2159.4ms TimeCoverageRelationStatistics Valid=1638, Invalid=9492, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 18:10:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-08-21 18:10:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 671. [2021-08-21 18:10:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.5641791044776119) internal successors, (1048), 670 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1048 transitions. [2021-08-21 18:10:32,158 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1048 transitions. Word has length 37 [2021-08-21 18:10:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:32,159 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1048 transitions. [2021-08-21 18:10:32,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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 18:10:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1048 transitions. [2021-08-21 18:10:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:32,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:32,160 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:32,190 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 18:10:32,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:10:32,381 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1368535236, now seen corresponding path program 16 times [2021-08-21 18:10:32,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:32,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841073482] [2021-08-21 18:10:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:32,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:32,605 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 18:10:32,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:32,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841073482] [2021-08-21 18:10:32,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841073482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:32,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282352729] [2021-08-21 18:10:32,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:32,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:32,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:32,606 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 18:10:32,607 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 18:10:33,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:10:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:33,815 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:10:33,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 18:10:33,912 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 18:10:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282352729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:33,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:33,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 18:10:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110377597] [2021-08-21 18:10:33,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:33,913 INFO L87 Difference]: Start difference. First operand 671 states and 1048 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:35,540 INFO L93 Difference]: Finished difference Result 2138 states and 3202 transitions. [2021-08-21 18:10:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:10:35,540 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:35,547 INFO L225 Difference]: With dead ends: 2138 [2021-08-21 18:10:35,547 INFO L226 Difference]: Without dead ends: 2043 [2021-08-21 18:10:35,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1588.5ms TimeCoverageRelationStatistics Valid=845, Invalid=5161, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:10:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-08-21 18:10:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 711. [2021-08-21 18:10:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.5577464788732394) internal successors, (1106), 710 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1106 transitions. [2021-08-21 18:10:35,564 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1106 transitions. Word has length 37 [2021-08-21 18:10:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1106 transitions. [2021-08-21 18:10:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1106 transitions. [2021-08-21 18:10:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:10:35,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:35,566 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:35,591 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 18:10:35,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:35,781 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2022687949, now seen corresponding path program 17 times [2021-08-21 18:10:35,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:35,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975133986] [2021-08-21 18:10:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:35,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:35,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:35,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975133986] [2021-08-21 18:10:35,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975133986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:35,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134511495] [2021-08-21 18:10:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:35,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:35,832 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 18:10:35,832 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 18:10:36,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:10:36,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:10:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:36,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134511495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:36,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:36,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:10:36,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921194872] [2021-08-21 18:10:36,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:10:36,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:10:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:36,606 INFO L87 Difference]: Start difference. First operand 711 states and 1106 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:36,625 INFO L93 Difference]: Finished difference Result 1137 states and 1723 transitions. [2021-08-21 18:10:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:10:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 18:10:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:36,628 INFO L225 Difference]: With dead ends: 1137 [2021-08-21 18:10:36,628 INFO L226 Difference]: Without dead ends: 1099 [2021-08-21 18:10:36,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-21 18:10:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 830. [2021-08-21 18:10:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.5536791314837153) internal successors, (1288), 829 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1288 transitions. [2021-08-21 18:10:36,642 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1288 transitions. Word has length 40 [2021-08-21 18:10:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:36,642 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1288 transitions. [2021-08-21 18:10:36,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1288 transitions. [2021-08-21 18:10:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:10:36,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:36,644 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:36,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:36,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:36,857 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:10:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 570148901, now seen corresponding path program 18 times [2021-08-21 18:10:36,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:36,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209570594] [2021-08-21 18:10:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:36,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:37,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:37,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209570594] [2021-08-21 18:10:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209570594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:37,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830510269] [2021-08-21 18:10:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:37,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:37,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:37,365 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 18:10:37,366 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 18:10:38,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:10:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:10:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:46,166 INFO L354 Elim1Store]: treesize reduction 195, result has 4.9 percent of original size [2021-08-21 18:10:46,166 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 7 new quantified variables, introduced 21 case distinctions, treesize of input 64 treesize of output 49 [2021-08-21 18:10:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830510269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:46,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:46,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 18:10:46,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873464968] [2021-08-21 18:10:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:10:46,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:10:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1398, Unknown=3, NotChecked=0, Total=1560 [2021-08-21 18:10:46,314 INFO L87 Difference]: Start difference. First operand 830 states and 1288 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 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 18:12:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:13,328 INFO L93 Difference]: Finished difference Result 4960 states and 7575 transitions. [2021-08-21 18:12:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-21 18:12:13,328 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:13,338 INFO L225 Difference]: With dead ends: 4960 [2021-08-21 18:12:13,339 INFO L226 Difference]: Without dead ends: 4340 [2021-08-21 18:12:13,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11665 ImplicationChecksByTransitivity, 36126.6ms TimeCoverageRelationStatistics Valid=4525, Invalid=27326, Unknown=11, NotChecked=0, Total=31862 [2021-08-21 18:12:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-08-21 18:12:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 976. [2021-08-21 18:12:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.5753846153846154) internal successors, (1536), 975 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1536 transitions. [2021-08-21 18:12:13,373 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1536 transitions. Word has length 43 [2021-08-21 18:12:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:13,373 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1536 transitions. [2021-08-21 18:12:13,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 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 18:12:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1536 transitions. [2021-08-21 18:12:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:13,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:13,375 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:13,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:12:13,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:13,600 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1238752825, now seen corresponding path program 19 times [2021-08-21 18:12:13,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:13,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134042812] [2021-08-21 18:12:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:13,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:14,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134042812] [2021-08-21 18:12:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134042812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957681880] [2021-08-21 18:12:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:14,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:14,046 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 18:12:14,048 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 18:12:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:15,854 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:12:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:12:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957681880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:15,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:15,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 18:12:15,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784183429] [2021-08-21 18:12:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:12:15,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:12:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:12:15,966 INFO L87 Difference]: Start difference. First operand 976 states and 1536 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 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 18:12:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:18,975 INFO L93 Difference]: Finished difference Result 3024 states and 4546 transitions. [2021-08-21 18:12:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:12:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:18,985 INFO L225 Difference]: With dead ends: 3024 [2021-08-21 18:12:18,985 INFO L226 Difference]: Without dead ends: 2957 [2021-08-21 18:12:18,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2902.2ms TimeCoverageRelationStatistics Valid=1279, Invalid=9023, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 18:12:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-08-21 18:12:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 1010. [2021-08-21 18:12:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.5738354806739345) internal successors, (1588), 1009 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1588 transitions. [2021-08-21 18:12:19,011 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1588 transitions. Word has length 43 [2021-08-21 18:12:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:19,011 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1588 transitions. [2021-08-21 18:12:19,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 40 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 18:12:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1588 transitions. [2021-08-21 18:12:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:19,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:19,013 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:19,049 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 18:12:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:19,229 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1138963339, now seen corresponding path program 20 times [2021-08-21 18:12:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:19,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691500942] [2021-08-21 18:12:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:19,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:19,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691500942] [2021-08-21 18:12:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691500942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:19,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801693298] [2021-08-21 18:12:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:19,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:19,630 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 18:12:19,632 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 18:12:20,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:21,440 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:12:21,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:12:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:21,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801693298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:21,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:21,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 18:12:21,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923386739] [2021-08-21 18:12:21,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:12:21,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:21,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:12:21,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:12:21,539 INFO L87 Difference]: Start difference. First operand 1010 states and 1588 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 18:12:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:26,424 INFO L93 Difference]: Finished difference Result 5193 states and 7926 transitions. [2021-08-21 18:12:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-21 18:12:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:26,435 INFO L225 Difference]: With dead ends: 5193 [2021-08-21 18:12:26,436 INFO L226 Difference]: Without dead ends: 4798 [2021-08-21 18:12:26,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6432 ImplicationChecksByTransitivity, 4067.8ms TimeCoverageRelationStatistics Valid=2626, Invalid=16556, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 18:12:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-08-21 18:12:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 1162. [2021-08-21 18:12:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.5968992248062015) internal successors, (1854), 1161 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1854 transitions. [2021-08-21 18:12:26,469 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1854 transitions. Word has length 43 [2021-08-21 18:12:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:26,469 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1854 transitions. [2021-08-21 18:12:26,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 18:12:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1854 transitions. [2021-08-21 18:12:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:26,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:26,472 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:26,499 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 18:12:26,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:12:26,692 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -630300867, now seen corresponding path program 21 times [2021-08-21 18:12:26,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:26,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380459016] [2021-08-21 18:12:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:26,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:27,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:27,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380459016] [2021-08-21 18:12:27,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380459016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:27,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778020123] [2021-08-21 18:12:27,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:27,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:27,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:27,132 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 18:12:27,133 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 18:12:28,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:12:28,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:28,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:29,057 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:12:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:12:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:29,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778020123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:29,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:29,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 18:12:29,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813300728] [2021-08-21 18:12:29,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:12:29,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:12:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:12:29,170 INFO L87 Difference]: Start difference. First operand 1162 states and 1854 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 18:12:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:32,959 INFO L93 Difference]: Finished difference Result 3492 states and 5245 transitions. [2021-08-21 18:12:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 18:12:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:32,964 INFO L225 Difference]: With dead ends: 3492 [2021-08-21 18:12:32,964 INFO L226 Difference]: Without dead ends: 3425 [2021-08-21 18:12:32,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5044 ImplicationChecksByTransitivity, 3589.1ms TimeCoverageRelationStatistics Valid=1888, Invalid=13612, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 18:12:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-08-21 18:12:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 1234. [2021-08-21 18:12:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 1.6066504460665045) internal successors, (1981), 1233 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1981 transitions. [2021-08-21 18:12:32,985 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1981 transitions. Word has length 43 [2021-08-21 18:12:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:32,985 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1981 transitions. [2021-08-21 18:12:32,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 18:12:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1981 transitions. [2021-08-21 18:12:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:32,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:32,988 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:33,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:12:33,200 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash 815899043, now seen corresponding path program 22 times [2021-08-21 18:12:33,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:33,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744203154] [2021-08-21 18:12:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:33,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:33,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:33,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744203154] [2021-08-21 18:12:33,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744203154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:33,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688332269] [2021-08-21 18:12:33,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:33,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:33,598 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 18:12:33,598 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 18:12:34,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:12:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:35,580 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:12:35,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:12:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:35,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688332269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:35,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:35,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 18:12:35,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899650868] [2021-08-21 18:12:35,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:12:35,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:35,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:12:35,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:12:35,695 INFO L87 Difference]: Start difference. First operand 1234 states and 1981 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 18:12:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:43,989 INFO L93 Difference]: Finished difference Result 4838 states and 7394 transitions. [2021-08-21 18:12:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-08-21 18:12:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:43,995 INFO L225 Difference]: With dead ends: 4838 [2021-08-21 18:12:43,995 INFO L226 Difference]: Without dead ends: 4314 [2021-08-21 18:12:43,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 6342.9ms TimeCoverageRelationStatistics Valid=4353, Invalid=29687, Unknown=0, NotChecked=0, Total=34040 [2021-08-21 18:12:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-08-21 18:12:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 1270. [2021-08-21 18:12:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 1.599684791174153) internal successors, (2030), 1269 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2030 transitions. [2021-08-21 18:12:44,033 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2030 transitions. Word has length 43 [2021-08-21 18:12:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:44,033 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2030 transitions. [2021-08-21 18:12:44,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 18:12:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2030 transitions. [2021-08-21 18:12:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:44,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:44,036 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:44,066 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 18:12:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:44,249 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1324561515, now seen corresponding path program 23 times [2021-08-21 18:12:44,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:44,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847927184] [2021-08-21 18:12:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:44,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:44,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847927184] [2021-08-21 18:12:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847927184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690593920] [2021-08-21 18:12:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:44,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:44,643 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 18:12:44,643 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 18:12:45,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:12:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:46,696 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:12:46,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:12:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:46,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690593920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:46,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:46,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 18:12:46,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615660958] [2021-08-21 18:12:46,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:12:46,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:12:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:12:46,792 INFO L87 Difference]: Start difference. First operand 1270 states and 2030 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 18:12:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:50,912 INFO L93 Difference]: Finished difference Result 3481 states and 5238 transitions. [2021-08-21 18:12:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-21 18:12:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:12:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:50,919 INFO L225 Difference]: With dead ends: 3481 [2021-08-21 18:12:50,919 INFO L226 Difference]: Without dead ends: 3414 [2021-08-21 18:12:50,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 3829.0ms TimeCoverageRelationStatistics Valid=2230, Invalid=16676, Unknown=0, NotChecked=0, Total=18906 [2021-08-21 18:12:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2021-08-21 18:12:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 1460. [2021-08-21 18:12:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 1.614804660726525) internal successors, (2356), 1459 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2356 transitions. [2021-08-21 18:12:50,949 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2356 transitions. Word has length 43 [2021-08-21 18:12:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:50,949 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 2356 transitions. [2021-08-21 18:12:50,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 18:12:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2356 transitions. [2021-08-21 18:12:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:12:50,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:50,952 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:50,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 18:12:51,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:51,178 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:12:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:51,178 INFO L82 PathProgramCache]: Analyzing trace with hash 597433853, now seen corresponding path program 24 times [2021-08-21 18:12:51,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:51,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831164313] [2021-08-21 18:12:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:51,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:51,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:51,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831164313] [2021-08-21 18:12:51,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831164313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:51,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196852962] [2021-08-21 18:12:51,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:51,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:51,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:51,552 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 18:12:51,553 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 18:12:52,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:12:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:12:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:53,852 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-21 18:12:53,853 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-08-21 18:12:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196852962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:53,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:12:53,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916005671] [2021-08-21 18:12:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:12:53,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:12:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:12:53,950 INFO L87 Difference]: Start difference. First operand 1460 states and 2356 transitions. Second operand has 37 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 18:13:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:00,170 INFO L93 Difference]: Finished difference Result 4119 states and 6253 transitions. [2021-08-21 18:13:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-21 18:13:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 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) Word has length 43 [2021-08-21 18:13:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:00,178 INFO L225 Difference]: With dead ends: 4119 [2021-08-21 18:13:00,178 INFO L226 Difference]: Without dead ends: 3822 [2021-08-21 18:13:00,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8814 ImplicationChecksByTransitivity, 4575.3ms TimeCoverageRelationStatistics Valid=2706, Invalid=21474, Unknown=0, NotChecked=0, Total=24180 [2021-08-21 18:13:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-08-21 18:13:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 1542. [2021-08-21 18:13:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.6145360155743025) internal successors, (2488), 1541 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2488 transitions. [2021-08-21 18:13:00,212 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2488 transitions. Word has length 43 [2021-08-21 18:13:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:00,212 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 2488 transitions. [2021-08-21 18:13:00,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 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 18:13:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2488 transitions. [2021-08-21 18:13:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:00,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:00,215 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:00,247 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 18:13:00,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:13:00,441 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash -155942087, now seen corresponding path program 25 times [2021-08-21 18:13:00,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:00,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241969058] [2021-08-21 18:13:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:00,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:13:00,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241969058] [2021-08-21 18:13:00,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241969058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990467112] [2021-08-21 18:13:00,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:00,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:00,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:00,798 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 18:13:00,800 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 18:13:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:02,935 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:03,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990467112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:03,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:13:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571675919] [2021-08-21 18:13:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:13:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:13:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:13:03,040 INFO L87 Difference]: Start difference. First operand 1542 states and 2488 transitions. Second operand has 37 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 18:13:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:06,246 INFO L93 Difference]: Finished difference Result 3858 states and 5900 transitions. [2021-08-21 18:13:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:13:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 37 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) Word has length 43 [2021-08-21 18:13:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:06,252 INFO L225 Difference]: With dead ends: 3858 [2021-08-21 18:13:06,252 INFO L226 Difference]: Without dead ends: 3791 [2021-08-21 18:13:06,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 2652.3ms TimeCoverageRelationStatistics Valid=1346, Invalid=9784, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 18:13:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2021-08-21 18:13:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 1572. [2021-08-21 18:13:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 1.6142584341183959) internal successors, (2536), 1571 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2536 transitions. [2021-08-21 18:13:06,285 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2536 transitions. Word has length 43 [2021-08-21 18:13:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:06,285 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2536 transitions. [2021-08-21 18:13:06,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 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 18:13:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2536 transitions. [2021-08-21 18:13:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:06,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:06,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:06,317 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 18:13:06,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:13:06,509 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -666831939, now seen corresponding path program 26 times [2021-08-21 18:13:06,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:06,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502497331] [2021-08-21 18:13:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:06,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:13:06,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:06,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502497331] [2021-08-21 18:13:06,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502497331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:06,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125435578] [2021-08-21 18:13:06,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:06,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:06,865 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 18:13:06,882 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 18:13:08,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:09,110 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:09,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:09,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125435578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:09,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:09,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:13:09,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570684583] [2021-08-21 18:13:09,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:13:09,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:13:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:13:09,206 INFO L87 Difference]: Start difference. First operand 1572 states and 2536 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:13:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:14,099 INFO L93 Difference]: Finished difference Result 5541 states and 8568 transitions. [2021-08-21 18:13:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-08-21 18:13:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:13:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:14,105 INFO L225 Difference]: With dead ends: 5541 [2021-08-21 18:13:14,105 INFO L226 Difference]: Without dead ends: 5172 [2021-08-21 18:13:14,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 3865.2ms TimeCoverageRelationStatistics Valid=2339, Invalid=17121, Unknown=0, NotChecked=0, Total=19460 [2021-08-21 18:13:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-08-21 18:13:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 1722. [2021-08-21 18:13:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 1.6234747239976757) internal successors, (2794), 1721 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2794 transitions. [2021-08-21 18:13:14,148 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2794 transitions. Word has length 43 [2021-08-21 18:13:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:14,148 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2794 transitions. [2021-08-21 18:13:14,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:13:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2794 transitions. [2021-08-21 18:13:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:14,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:14,151 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:14,171 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 18:13:14,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:13:14,353 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash 567293313, now seen corresponding path program 27 times [2021-08-21 18:13:14,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:14,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605851704] [2021-08-21 18:13:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:14,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:13:14,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:14,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605851704] [2021-08-21 18:13:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605851704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:14,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484011677] [2021-08-21 18:13:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:13:14,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:14,707 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 18:13:14,708 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 18:13:16,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:13:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:17,064 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:17,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484011677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:17,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:17,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:13:17,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476202855] [2021-08-21 18:13:17,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:13:17,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:13:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:13:17,176 INFO L87 Difference]: Start difference. First operand 1722 states and 2794 transitions. Second operand has 37 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 18:13:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:21,653 INFO L93 Difference]: Finished difference Result 5139 states and 7963 transitions. [2021-08-21 18:13:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-21 18:13:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 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) Word has length 43 [2021-08-21 18:13:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:21,659 INFO L225 Difference]: With dead ends: 5139 [2021-08-21 18:13:21,659 INFO L226 Difference]: Without dead ends: 4774 [2021-08-21 18:13:21,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7023 ImplicationChecksByTransitivity, 3631.3ms TimeCoverageRelationStatistics Valid=2223, Invalid=16959, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 18:13:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2021-08-21 18:13:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 1774. [2021-08-21 18:13:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 1.631697687535251) internal successors, (2893), 1773 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2893 transitions. [2021-08-21 18:13:21,686 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2893 transitions. Word has length 43 [2021-08-21 18:13:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:21,686 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 2893 transitions. [2021-08-21 18:13:21,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 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 18:13:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2893 transitions. [2021-08-21 18:13:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:21,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:21,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:21,708 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 18:13:21,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:21,889 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1403919145, now seen corresponding path program 28 times [2021-08-21 18:13:21,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:21,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147389855] [2021-08-21 18:13:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:21,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:13:22,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:22,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147389855] [2021-08-21 18:13:22,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147389855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:22,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13720444] [2021-08-21 18:13:22,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:13:22,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:22,245 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 18:13:22,247 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 18:13:23,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:13:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:24,615 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:24,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:24,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13720444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:24,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:24,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:13:24,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865593664] [2021-08-21 18:13:24,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:13:24,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:13:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:13:24,717 INFO L87 Difference]: Start difference. First operand 1774 states and 2893 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:29,076 INFO L93 Difference]: Finished difference Result 5031 states and 7654 transitions. [2021-08-21 18:13:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 18:13:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:13:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:29,081 INFO L225 Difference]: With dead ends: 5031 [2021-08-21 18:13:29,081 INFO L226 Difference]: Without dead ends: 4942 [2021-08-21 18:13:29,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 3898.7ms TimeCoverageRelationStatistics Valid=2322, Invalid=11958, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 18:13:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-08-21 18:13:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 1828. [2021-08-21 18:13:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 1.6299945265462508) internal successors, (2978), 1827 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2978 transitions. [2021-08-21 18:13:29,113 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2978 transitions. Word has length 43 [2021-08-21 18:13:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:29,113 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 2978 transitions. [2021-08-21 18:13:29,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2978 transitions. [2021-08-21 18:13:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:29,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:29,116 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:29,159 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 18:13:29,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:29,337 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash 770134635, now seen corresponding path program 29 times [2021-08-21 18:13:29,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:29,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111548854] [2021-08-21 18:13:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:29,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:13:29,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:29,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111548854] [2021-08-21 18:13:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111548854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:29,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500438292] [2021-08-21 18:13:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:13:29,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:29,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:29,777 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 18:13:29,809 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 18:13:31,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:13:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:32,245 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500438292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:32,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:13:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237545420] [2021-08-21 18:13:32,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:13:32,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:13:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:13:32,347 INFO L87 Difference]: Start difference. First operand 1828 states and 2978 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:36,022 INFO L93 Difference]: Finished difference Result 4455 states and 6797 transitions. [2021-08-21 18:13:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 18:13:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:13:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:36,029 INFO L225 Difference]: With dead ends: 4455 [2021-08-21 18:13:36,029 INFO L226 Difference]: Without dead ends: 4392 [2021-08-21 18:13:36,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4795 ImplicationChecksByTransitivity, 3565.6ms TimeCoverageRelationStatistics Valid=2025, Invalid=12981, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 18:13:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-08-21 18:13:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 1830. [2021-08-21 18:13:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.6293056314926189) internal successors, (2980), 1829 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2980 transitions. [2021-08-21 18:13:36,067 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2980 transitions. Word has length 43 [2021-08-21 18:13:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 2980 transitions. [2021-08-21 18:13:36,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2980 transitions. [2021-08-21 18:13:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:36,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:36,071 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:36,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:36,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:36,297 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash -451752597, now seen corresponding path program 30 times [2021-08-21 18:13:36,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:36,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076211293] [2021-08-21 18:13:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:36,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:13:36,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076211293] [2021-08-21 18:13:36,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076211293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680010591] [2021-08-21 18:13:36,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:36,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:36,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:36,640 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 18:13:36,641 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 18:13:38,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:13:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:39,116 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:39,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:39,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680010591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:39,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:39,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:13:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533892136] [2021-08-21 18:13:39,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:13:39,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:13:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:13:39,230 INFO L87 Difference]: Start difference. First operand 1830 states and 2980 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:13:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:44,246 INFO L93 Difference]: Finished difference Result 4700 states and 7299 transitions. [2021-08-21 18:13:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-21 18:13:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:13:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:44,250 INFO L225 Difference]: With dead ends: 4700 [2021-08-21 18:13:44,251 INFO L226 Difference]: Without dead ends: 4364 [2021-08-21 18:13:44,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7900 ImplicationChecksByTransitivity, 3852.5ms TimeCoverageRelationStatistics Valid=2419, Invalid=18751, Unknown=0, NotChecked=0, Total=21170 [2021-08-21 18:13:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-08-21 18:13:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 1934. [2021-08-21 18:13:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 1.6316606311433006) internal successors, (3154), 1933 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3154 transitions. [2021-08-21 18:13:44,276 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3154 transitions. Word has length 43 [2021-08-21 18:13:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:44,276 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3154 transitions. [2021-08-21 18:13:44,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:13:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3154 transitions. [2021-08-21 18:13:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:44,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:44,278 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:44,299 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 18:13:44,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:13:44,479 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash 922103269, now seen corresponding path program 31 times [2021-08-21 18:13:44,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:44,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187620383] [2021-08-21 18:13:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:44,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:13:44,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:44,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187620383] [2021-08-21 18:13:44,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187620383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:44,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884485156] [2021-08-21 18:13:44,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:44,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:44,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:44,806 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 18:13:44,807 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 18:13:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:47,316 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:47,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884485156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:47,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:47,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:13:47,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748501534] [2021-08-21 18:13:47,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:13:47,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:13:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:13:47,412 INFO L87 Difference]: Start difference. First operand 1934 states and 3154 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:52,362 INFO L93 Difference]: Finished difference Result 6160 states and 9565 transitions. [2021-08-21 18:13:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-21 18:13:52,363 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:13:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:52,368 INFO L225 Difference]: With dead ends: 6160 [2021-08-21 18:13:52,368 INFO L226 Difference]: Without dead ends: 5822 [2021-08-21 18:13:52,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7643 ImplicationChecksByTransitivity, 4261.5ms TimeCoverageRelationStatistics Valid=2851, Invalid=18611, Unknown=0, NotChecked=0, Total=21462 [2021-08-21 18:13:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-08-21 18:13:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 2064. [2021-08-21 18:13:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 1.622879301987397) internal successors, (3348), 2063 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3348 transitions. [2021-08-21 18:13:52,397 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3348 transitions. Word has length 43 [2021-08-21 18:13:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 3348 transitions. [2021-08-21 18:13:52,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3348 transitions. [2021-08-21 18:13:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:13:52,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:52,400 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:52,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:52,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:52,601 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:13:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash -475574847, now seen corresponding path program 32 times [2021-08-21 18:13:52,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:52,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936593153] [2021-08-21 18:13:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:52,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:13:52,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936593153] [2021-08-21 18:13:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936593153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:52,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357258304] [2021-08-21 18:13:52,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:52,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:52,995 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 18:13:52,996 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 18:13:54,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:54,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:13:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:55,670 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:13:55,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:13:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:55,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357258304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:55,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:55,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:13:55,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243160655] [2021-08-21 18:13:55,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:13:55,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:13:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:13:55,766 INFO L87 Difference]: Start difference. First operand 2064 states and 3348 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:14:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:00,961 INFO L93 Difference]: Finished difference Result 4534 states and 7050 transitions. [2021-08-21 18:14:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-08-21 18:14:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:00,967 INFO L225 Difference]: With dead ends: 4534 [2021-08-21 18:14:00,967 INFO L226 Difference]: Without dead ends: 4194 [2021-08-21 18:14:00,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8759 ImplicationChecksByTransitivity, 3934.9ms TimeCoverageRelationStatistics Valid=2613, Invalid=20339, Unknown=0, NotChecked=0, Total=22952 [2021-08-21 18:14:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-08-21 18:14:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2134. [2021-08-21 18:14:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2133 states have (on average 1.6282231598687296) internal successors, (3473), 2133 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3473 transitions. [2021-08-21 18:14:01,000 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3473 transitions. Word has length 43 [2021-08-21 18:14:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:01,001 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3473 transitions. [2021-08-21 18:14:01,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 18:14:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3473 transitions. [2021-08-21 18:14:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:01,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:01,004 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:01,041 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 18:14:01,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:01,232 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1972474775, now seen corresponding path program 33 times [2021-08-21 18:14:01,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:01,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119598193] [2021-08-21 18:14:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:01,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:14:01,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:01,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119598193] [2021-08-21 18:14:01,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119598193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:01,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115090453] [2021-08-21 18:14:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:01,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:01,641 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 18:14:01,672 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 18:14:03,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:14:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:04,310 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:04,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115090453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:04,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:04,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:14:04,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060125089] [2021-08-21 18:14:04,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:14:04,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:14:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:14:04,424 INFO L87 Difference]: Start difference. First operand 2134 states and 3473 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:08,625 INFO L93 Difference]: Finished difference Result 6793 states and 10356 transitions. [2021-08-21 18:14:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-21 18:14:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:08,632 INFO L225 Difference]: With dead ends: 6793 [2021-08-21 18:14:08,632 INFO L226 Difference]: Without dead ends: 6654 [2021-08-21 18:14:08,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 3870.6ms TimeCoverageRelationStatistics Valid=2352, Invalid=15204, Unknown=0, NotChecked=0, Total=17556 [2021-08-21 18:14:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-08-21 18:14:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2158. [2021-08-21 18:14:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 1.6258692628650904) internal successors, (3507), 2157 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 3507 transitions. [2021-08-21 18:14:08,674 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 3507 transitions. Word has length 43 [2021-08-21 18:14:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:08,674 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 3507 transitions. [2021-08-21 18:14:08,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 3507 transitions. [2021-08-21 18:14:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:08,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:08,678 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:08,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:14:08,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:14:08,905 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1591739855, now seen corresponding path program 34 times [2021-08-21 18:14:08,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:08,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057751261] [2021-08-21 18:14:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:08,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 18:14:09,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:09,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057751261] [2021-08-21 18:14:09,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057751261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:09,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966504650] [2021-08-21 18:14:09,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:09,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:09,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:09,206 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 18:14:09,207 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 18:14:10,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:10,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:11,878 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:11,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:11,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966504650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:11,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:11,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 35 [2021-08-21 18:14:11,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255366677] [2021-08-21 18:14:11,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:14:11,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:11,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:14:11,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:14:11,970 INFO L87 Difference]: Start difference. First operand 2158 states and 3507 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:15,616 INFO L93 Difference]: Finished difference Result 3928 states and 6002 transitions. [2021-08-21 18:14:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 18:14:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:15,621 INFO L225 Difference]: With dead ends: 3928 [2021-08-21 18:14:15,621 INFO L226 Difference]: Without dead ends: 3888 [2021-08-21 18:14:15,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 3266.3ms TimeCoverageRelationStatistics Valid=1922, Invalid=12598, Unknown=0, NotChecked=0, Total=14520 [2021-08-21 18:14:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-08-21 18:14:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2124. [2021-08-21 18:14:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.627885068299576) internal successors, (3456), 2123 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3456 transitions. [2021-08-21 18:14:15,648 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3456 transitions. Word has length 43 [2021-08-21 18:14:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3456 transitions. [2021-08-21 18:14:15,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3456 transitions. [2021-08-21 18:14:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:15,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:15,652 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:15,673 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 18:14:15,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:14:15,855 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1079601381, now seen corresponding path program 35 times [2021-08-21 18:14:15,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:15,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042007796] [2021-08-21 18:14:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:15,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:14:16,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:16,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042007796] [2021-08-21 18:14:16,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042007796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:16,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219225121] [2021-08-21 18:14:16,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:14:16,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:16,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:16,222 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 18:14:16,244 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 18:14:18,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:14:18,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:18,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:19,029 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:19,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:19,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219225121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:19,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:19,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:14:19,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575575755] [2021-08-21 18:14:19,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:14:19,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:14:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:14:19,124 INFO L87 Difference]: Start difference. First operand 2124 states and 3456 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:22,739 INFO L93 Difference]: Finished difference Result 5659 states and 8644 transitions. [2021-08-21 18:14:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 18:14:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:22,745 INFO L225 Difference]: With dead ends: 5659 [2021-08-21 18:14:22,745 INFO L226 Difference]: Without dead ends: 5516 [2021-08-21 18:14:22,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4828 ImplicationChecksByTransitivity, 3250.5ms TimeCoverageRelationStatistics Valid=1917, Invalid=12845, Unknown=0, NotChecked=0, Total=14762 [2021-08-21 18:14:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-08-21 18:14:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 2092. [2021-08-21 18:14:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 1.6260162601626016) internal successors, (3400), 2091 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3400 transitions. [2021-08-21 18:14:22,783 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3400 transitions. Word has length 43 [2021-08-21 18:14:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3400 transitions. [2021-08-21 18:14:22,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3400 transitions. [2021-08-21 18:14:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:22,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:22,787 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:22,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:14:23,001 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1800925561, now seen corresponding path program 36 times [2021-08-21 18:14:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:23,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223456714] [2021-08-21 18:14:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:23,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:14:23,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:23,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223456714] [2021-08-21 18:14:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223456714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:23,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836924271] [2021-08-21 18:14:23,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:14:23,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:23,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:23,372 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 18:14:23,373 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 18:14:25,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:14:25,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:14:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:26,234 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:26,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836924271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:26,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:26,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:14:26,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061785567] [2021-08-21 18:14:26,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:14:26,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:14:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:14:26,342 INFO L87 Difference]: Start difference. First operand 2092 states and 3400 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:29,709 INFO L93 Difference]: Finished difference Result 6347 states and 9734 transitions. [2021-08-21 18:14:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 18:14:29,709 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:29,716 INFO L225 Difference]: With dead ends: 6347 [2021-08-21 18:14:29,716 INFO L226 Difference]: Without dead ends: 6214 [2021-08-21 18:14:29,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 2984.5ms TimeCoverageRelationStatistics Valid=1546, Invalid=11110, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 18:14:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2021-08-21 18:14:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 2170. [2021-08-21 18:14:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.623789764868603) internal successors, (3522), 2169 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3522 transitions. [2021-08-21 18:14:29,749 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3522 transitions. Word has length 43 [2021-08-21 18:14:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:29,749 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3522 transitions. [2021-08-21 18:14:29,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3522 transitions. [2021-08-21 18:14:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:29,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:29,752 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:29,773 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 18:14:29,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:14:29,952 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1190651655, now seen corresponding path program 37 times [2021-08-21 18:14:29,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:29,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394911059] [2021-08-21 18:14:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:29,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:14:30,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:30,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394911059] [2021-08-21 18:14:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394911059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:30,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71605185] [2021-08-21 18:14:30,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:14:30,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:30,311 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 18:14:30,312 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 18:14:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:33,227 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:33,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:33,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71605185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:33,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:33,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:14:33,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533181681] [2021-08-21 18:14:33,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:14:33,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:14:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:14:33,350 INFO L87 Difference]: Start difference. First operand 2170 states and 3522 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:36,780 INFO L93 Difference]: Finished difference Result 4166 states and 6338 transitions. [2021-08-21 18:14:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 18:14:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:36,784 INFO L225 Difference]: With dead ends: 4166 [2021-08-21 18:14:36,784 INFO L226 Difference]: Without dead ends: 4134 [2021-08-21 18:14:36,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3187.9ms TimeCoverageRelationStatistics Valid=1673, Invalid=11667, Unknown=0, NotChecked=0, Total=13340 [2021-08-21 18:14:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-08-21 18:14:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 2176. [2021-08-21 18:14:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.6229885057471265) internal successors, (3530), 2175 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3530 transitions. [2021-08-21 18:14:36,820 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3530 transitions. Word has length 43 [2021-08-21 18:14:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:36,820 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 3530 transitions. [2021-08-21 18:14:36,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3530 transitions. [2021-08-21 18:14:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:36,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:36,824 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:36,855 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 18:14:37,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:14:37,049 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1411526871, now seen corresponding path program 38 times [2021-08-21 18:14:37,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:37,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628743454] [2021-08-21 18:14:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:37,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:14:37,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:37,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628743454] [2021-08-21 18:14:37,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628743454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:37,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661876469] [2021-08-21 18:14:37,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:14:37,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:37,397 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 18:14:37,398 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 18:14:39,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:14:39,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:39,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:40,364 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:40,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661876469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:40,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:14:40,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124060967] [2021-08-21 18:14:40,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:14:40,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:14:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:14:40,489 INFO L87 Difference]: Start difference. First operand 2176 states and 3530 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:45,735 INFO L93 Difference]: Finished difference Result 4141 states and 6333 transitions. [2021-08-21 18:14:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-21 18:14:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:45,740 INFO L225 Difference]: With dead ends: 4141 [2021-08-21 18:14:45,740 INFO L226 Difference]: Without dead ends: 4081 [2021-08-21 18:14:45,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7916 ImplicationChecksByTransitivity, 4478.0ms TimeCoverageRelationStatistics Valid=2776, Invalid=19574, Unknown=0, NotChecked=0, Total=22350 [2021-08-21 18:14:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-08-21 18:14:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 2216. [2021-08-21 18:14:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 1.6203160270880361) internal successors, (3589), 2215 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3589 transitions. [2021-08-21 18:14:45,766 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3589 transitions. Word has length 43 [2021-08-21 18:14:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:45,766 INFO L470 AbstractCegarLoop]: Abstraction has 2216 states and 3589 transitions. [2021-08-21 18:14:45,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3589 transitions. [2021-08-21 18:14:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:45,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:45,768 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:45,790 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 18:14:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 18:14:45,969 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash -488255301, now seen corresponding path program 39 times [2021-08-21 18:14:45,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780116642] [2021-08-21 18:14:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:45,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:14:46,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:46,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780116642] [2021-08-21 18:14:46,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780116642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:46,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057092955] [2021-08-21 18:14:46,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:46,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:46,244 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 18:14:46,246 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 18:14:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:14:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:49,265 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:49,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057092955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:49,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:49,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 18:14:49,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315068305] [2021-08-21 18:14:49,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:14:49,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:14:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:14:49,363 INFO L87 Difference]: Start difference. First operand 2216 states and 3589 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:53,304 INFO L93 Difference]: Finished difference Result 6023 states and 9145 transitions. [2021-08-21 18:14:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-21 18:14:53,305 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:14:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:53,311 INFO L225 Difference]: With dead ends: 6023 [2021-08-21 18:14:53,311 INFO L226 Difference]: Without dead ends: 5883 [2021-08-21 18:14:53,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 3442.5ms TimeCoverageRelationStatistics Valid=2263, Invalid=15827, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 18:14:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2021-08-21 18:14:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 2350. [2021-08-21 18:14:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 1.6108982545764154) internal successors, (3784), 2349 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3784 transitions. [2021-08-21 18:14:53,346 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3784 transitions. Word has length 43 [2021-08-21 18:14:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3784 transitions. [2021-08-21 18:14:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3784 transitions. [2021-08-21 18:14:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:14:53,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:53,349 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:53,371 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 18:14:53,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:14:53,550 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:14:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash -179144767, now seen corresponding path program 40 times [2021-08-21 18:14:53,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:53,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197356251] [2021-08-21 18:14:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:53,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:14:53,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:53,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197356251] [2021-08-21 18:14:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197356251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:53,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756710411] [2021-08-21 18:14:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:53,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:53,913 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 18:14:53,914 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 18:14:56,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:57,088 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:14:57,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:14:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756710411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:57,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:57,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 18:14:57,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119912469] [2021-08-21 18:14:57,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:14:57,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:14:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:14:57,194 INFO L87 Difference]: Start difference. First operand 2350 states and 3784 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:00,860 INFO L93 Difference]: Finished difference Result 6495 states and 9945 transitions. [2021-08-21 18:15:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-21 18:15:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:15:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:00,872 INFO L225 Difference]: With dead ends: 6495 [2021-08-21 18:15:00,872 INFO L226 Difference]: Without dead ends: 6362 [2021-08-21 18:15:00,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4347 ImplicationChecksByTransitivity, 3259.3ms TimeCoverageRelationStatistics Valid=1630, Invalid=12176, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 18:15:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2021-08-21 18:15:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 2414. [2021-08-21 18:15:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 1.6104434314131786) internal successors, (3886), 2413 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3886 transitions. [2021-08-21 18:15:00,910 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3886 transitions. Word has length 43 [2021-08-21 18:15:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:00,910 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3886 transitions. [2021-08-21 18:15:00,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3886 transitions. [2021-08-21 18:15:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:15:00,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:00,913 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:00,935 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 18:15:01,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:15:01,114 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1124245313, now seen corresponding path program 41 times [2021-08-21 18:15:01,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:01,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571394911] [2021-08-21 18:15:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:01,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:15:01,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:01,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571394911] [2021-08-21 18:15:01,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571394911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:01,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916860786] [2021-08-21 18:15:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:01,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:01,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:01,570 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 18:15:01,598 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 18:15:03,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:15:03,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:15:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:04,925 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:15:04,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:15:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:05,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916860786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:05,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:05,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 18:15:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300409875] [2021-08-21 18:15:05,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:15:05,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:15:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:15:05,029 INFO L87 Difference]: Start difference. First operand 2414 states and 3886 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:08,245 INFO L93 Difference]: Finished difference Result 4804 states and 7251 transitions. [2021-08-21 18:15:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:15:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:15:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:08,250 INFO L225 Difference]: With dead ends: 4804 [2021-08-21 18:15:08,250 INFO L226 Difference]: Without dead ends: 4772 [2021-08-21 18:15:08,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3522 ImplicationChecksByTransitivity, 3036.4ms TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 18:15:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-08-21 18:15:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 2398. [2021-08-21 18:15:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 1.611180642469754) internal successors, (3862), 2397 states have internal predecessors, (3862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3862 transitions. [2021-08-21 18:15:08,284 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3862 transitions. Word has length 43 [2021-08-21 18:15:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:08,284 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 3862 transitions. [2021-08-21 18:15:08,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3862 transitions. [2021-08-21 18:15:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:15:08,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:08,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:08,318 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 18:15:08,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:08,509 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash 394707625, now seen corresponding path program 42 times [2021-08-21 18:15:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:08,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293182693] [2021-08-21 18:15:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:08,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:08,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:08,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293182693] [2021-08-21 18:15:08,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293182693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:08,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981213961] [2021-08-21 18:15:08,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:08,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:08,874 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 18:15:08,877 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 18:15:11,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:15:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:15:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:12,209 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:15:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:15:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:12,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981213961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:12,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:12,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:15:12,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609814830] [2021-08-21 18:15:12,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:15:12,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:15:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:15:12,310 INFO L87 Difference]: Start difference. First operand 2398 states and 3862 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:17,866 INFO L93 Difference]: Finished difference Result 6044 states and 9160 transitions. [2021-08-21 18:15:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-21 18:15:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:15:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:17,872 INFO L225 Difference]: With dead ends: 6044 [2021-08-21 18:15:17,872 INFO L226 Difference]: Without dead ends: 5895 [2021-08-21 18:15:17,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7786 ImplicationChecksByTransitivity, 4502.2ms TimeCoverageRelationStatistics Valid=2801, Invalid=19251, Unknown=0, NotChecked=0, Total=22052 [2021-08-21 18:15:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-08-21 18:15:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 2360. [2021-08-21 18:15:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 1.6074607884696905) internal successors, (3792), 2359 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 3792 transitions. [2021-08-21 18:15:17,903 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 3792 transitions. Word has length 43 [2021-08-21 18:15:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 3792 transitions. [2021-08-21 18:15:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 3792 transitions. [2021-08-21 18:15:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:15:17,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:17,906 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:17,929 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 18:15:18,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:18,107 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash 903370097, now seen corresponding path program 43 times [2021-08-21 18:15:18,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:18,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595402163] [2021-08-21 18:15:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:18,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:15:18,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:18,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595402163] [2021-08-21 18:15:18,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595402163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:18,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751728891] [2021-08-21 18:15:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:18,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:18,434 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 18:15:18,435 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 18:15:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:15:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:21,771 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:15:21,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:15:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:21,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751728891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:21,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:21,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 18:15:21,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062927999] [2021-08-21 18:15:21,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:15:21,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:21,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:15:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:15:21,875 INFO L87 Difference]: Start difference. First operand 2360 states and 3792 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:25,663 INFO L93 Difference]: Finished difference Result 4811 states and 7234 transitions. [2021-08-21 18:15:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-21 18:15:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:15:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:25,669 INFO L225 Difference]: With dead ends: 4811 [2021-08-21 18:15:25,669 INFO L226 Difference]: Without dead ends: 4759 [2021-08-21 18:15:25,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5580 ImplicationChecksByTransitivity, 3348.4ms TimeCoverageRelationStatistics Valid=1986, Invalid=14270, Unknown=0, NotChecked=0, Total=16256 [2021-08-21 18:15:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-08-21 18:15:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2414. [2021-08-21 18:15:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 1.6058847907169498) internal successors, (3875), 2413 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3875 transitions. [2021-08-21 18:15:25,706 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3875 transitions. Word has length 43 [2021-08-21 18:15:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:25,707 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3875 transitions. [2021-08-21 18:15:25,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3875 transitions. [2021-08-21 18:15:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:15:25,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:25,710 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:25,733 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 18:15:25,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:15:25,911 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash -844699569, now seen corresponding path program 44 times [2021-08-21 18:15:25,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:25,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870894289] [2021-08-21 18:15:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:25,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:15:26,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:26,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870894289] [2021-08-21 18:15:26,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870894289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:26,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60966832] [2021-08-21 18:15:26,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:26,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:26,245 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 18:15:26,246 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 18:15:28,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:15:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:29,647 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:15:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:15:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:29,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60966832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:29,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 35 [2021-08-21 18:15:29,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629153859] [2021-08-21 18:15:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:15:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:15:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:15:29,741 INFO L87 Difference]: Start difference. First operand 2414 states and 3875 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:33,002 INFO L93 Difference]: Finished difference Result 3774 states and 5794 transitions. [2021-08-21 18:15:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-21 18:15:33,002 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:15:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:33,005 INFO L225 Difference]: With dead ends: 3774 [2021-08-21 18:15:33,005 INFO L226 Difference]: Without dead ends: 3734 [2021-08-21 18:15:33,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 3073.9ms TimeCoverageRelationStatistics Valid=1711, Invalid=10279, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 18:15:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-08-21 18:15:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 2376. [2021-08-21 18:15:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 1.608) internal successors, (3819), 2375 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3819 transitions. [2021-08-21 18:15:33,032 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3819 transitions. Word has length 43 [2021-08-21 18:15:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:33,032 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 3819 transitions. [2021-08-21 18:15:33,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3819 transitions. [2021-08-21 18:15:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:15:33,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:33,035 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:33,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:33,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:15:33,236 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1327933258, now seen corresponding path program 45 times [2021-08-21 18:15:33,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:33,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286941236] [2021-08-21 18:15:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:33,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:33,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:33,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286941236] [2021-08-21 18:15:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286941236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:33,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647093515] [2021-08-21 18:15:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:33,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:33,305 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 18:15:33,321 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 18:15:35,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:15:35,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:35,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:15:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:35,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647093515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:35,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:35,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:15:35,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169246458] [2021-08-21 18:15:35,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:15:35,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:15:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:15:35,991 INFO L87 Difference]: Start difference. First operand 2376 states and 3819 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:36,010 INFO L93 Difference]: Finished difference Result 2971 states and 4681 transitions. [2021-08-21 18:15:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:15:36,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 18:15:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:36,013 INFO L225 Difference]: With dead ends: 2971 [2021-08-21 18:15:36,013 INFO L226 Difference]: Without dead ends: 2927 [2021-08-21 18:15:36,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:15:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-08-21 18:15:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2523. [2021-08-21 18:15:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 1.6011102299762094) internal successors, (4038), 2522 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 4038 transitions. [2021-08-21 18:15:36,038 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 4038 transitions. Word has length 46 [2021-08-21 18:15:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:36,038 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 4038 transitions. [2021-08-21 18:15:36,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 4038 transitions. [2021-08-21 18:15:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:15:36,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:36,042 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:36,066 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 18:15:36,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:15:36,244 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash 426297506, now seen corresponding path program 46 times [2021-08-21 18:15:36,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:36,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458381062] [2021-08-21 18:15:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:36,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:36,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:36,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458381062] [2021-08-21 18:15:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458381062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:36,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579760626] [2021-08-21 18:15:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:36,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:36,914 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 18:15:36,917 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 18:15:39,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:39,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:15:39,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:40,987 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:15:40,988 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:15:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:41,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579760626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:41,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:41,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:15:41,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084129766] [2021-08-21 18:15:41,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:15:41,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:41,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:15:41,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:15:41,113 INFO L87 Difference]: Start difference. First operand 2523 states and 4038 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:48,274 INFO L93 Difference]: Finished difference Result 8678 states and 13285 transitions. [2021-08-21 18:15:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-08-21 18:15:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:15:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:48,284 INFO L225 Difference]: With dead ends: 8678 [2021-08-21 18:15:48,284 INFO L226 Difference]: Without dead ends: 8133 [2021-08-21 18:15:48,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7847 ImplicationChecksByTransitivity, 5538.2ms TimeCoverageRelationStatistics Valid=2862, Invalid=21630, Unknown=0, NotChecked=0, Total=24492 [2021-08-21 18:15:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2021-08-21 18:15:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 2681. [2021-08-21 18:15:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.6100746268656716) internal successors, (4315), 2680 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 4315 transitions. [2021-08-21 18:15:48,330 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 4315 transitions. Word has length 49 [2021-08-21 18:15:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:48,330 INFO L470 AbstractCegarLoop]: Abstraction has 2681 states and 4315 transitions. [2021-08-21 18:15:48,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 4315 transitions. [2021-08-21 18:15:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:15:48,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:48,333 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:48,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:48,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:48,534 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:15:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -381857758, now seen corresponding path program 47 times [2021-08-21 18:15:48,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:48,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198926826] [2021-08-21 18:15:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:48,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:49,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:49,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198926826] [2021-08-21 18:15:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198926826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:49,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17113575] [2021-08-21 18:15:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:49,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:49,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:49,178 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 18:15:49,179 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 18:15:51,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:15:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:15:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:53,259 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:15:53,259 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:15:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:53,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17113575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:53,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:53,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:15:53,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283691206] [2021-08-21 18:15:53,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:15:53,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:15:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:15:53,378 INFO L87 Difference]: Start difference. First operand 2681 states and 4315 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:59,851 INFO L93 Difference]: Finished difference Result 7625 states and 11543 transitions. [2021-08-21 18:15:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-21 18:15:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:15:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:59,860 INFO L225 Difference]: With dead ends: 7625 [2021-08-21 18:15:59,860 INFO L226 Difference]: Without dead ends: 7480 [2021-08-21 18:15:59,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 5247.6ms TimeCoverageRelationStatistics Valid=2739, Invalid=20517, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 18:15:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7480 states. [2021-08-21 18:15:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7480 to 2715. [2021-08-21 18:15:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 1.6083271923360354) internal successors, (4365), 2714 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4365 transitions. [2021-08-21 18:15:59,903 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4365 transitions. Word has length 49 [2021-08-21 18:15:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:59,903 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4365 transitions. [2021-08-21 18:15:59,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4365 transitions. [2021-08-21 18:15:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:15:59,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:59,906 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:59,931 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 18:16:00,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:16:00,107 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:00,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1252521458, now seen corresponding path program 48 times [2021-08-21 18:16:00,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:00,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464578681] [2021-08-21 18:16:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:00,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:00,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:00,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464578681] [2021-08-21 18:16:00,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464578681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:00,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46475017] [2021-08-21 18:16:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:16:00,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:00,793 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 18:16:00,794 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 18:16:03,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:16:03,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:03,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:16:03,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:05,030 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:16:05,030 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:16:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:05,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46475017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:05,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:05,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:16:05,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321085660] [2021-08-21 18:16:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:16:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:16:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:16:05,149 INFO L87 Difference]: Start difference. First operand 2715 states and 4365 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:11,119 INFO L93 Difference]: Finished difference Result 7857 states and 11943 transitions. [2021-08-21 18:16:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 18:16:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:16:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:11,129 INFO L225 Difference]: With dead ends: 7857 [2021-08-21 18:16:11,129 INFO L226 Difference]: Without dead ends: 7766 [2021-08-21 18:16:11,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6150 ImplicationChecksByTransitivity, 5017.4ms TimeCoverageRelationStatistics Valid=2308, Invalid=17998, Unknown=0, NotChecked=0, Total=20306 [2021-08-21 18:16:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-08-21 18:16:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 2787. [2021-08-21 18:16:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.6083991385498924) internal successors, (4481), 2786 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4481 transitions. [2021-08-21 18:16:11,175 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4481 transitions. Word has length 49 [2021-08-21 18:16:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:11,175 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4481 transitions. [2021-08-21 18:16:11,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4481 transitions. [2021-08-21 18:16:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:16:11,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:11,178 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:11,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:11,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:11,379 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 921532322, now seen corresponding path program 49 times [2021-08-21 18:16:11,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:11,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182038364] [2021-08-21 18:16:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:11,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:12,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:12,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182038364] [2021-08-21 18:16:12,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182038364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:12,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387656275] [2021-08-21 18:16:12,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:16:12,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:12,012 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 18:16:12,013 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 18:16:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:16:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:16,339 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:16:16,340 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:16:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387656275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:16,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:16,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:16:16,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307812616] [2021-08-21 18:16:16,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:16:16,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:16:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:16:16,457 INFO L87 Difference]: Start difference. First operand 2787 states and 4481 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:20,868 INFO L93 Difference]: Finished difference Result 6373 states and 9690 transitions. [2021-08-21 18:16:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 18:16:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:16:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:20,874 INFO L225 Difference]: With dead ends: 6373 [2021-08-21 18:16:20,874 INFO L226 Difference]: Without dead ends: 6306 [2021-08-21 18:16:20,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 4282.3ms TimeCoverageRelationStatistics Valid=1650, Invalid=13850, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 18:16:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2021-08-21 18:16:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 2829. [2021-08-21 18:16:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 1.6078500707213579) internal successors, (4547), 2828 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4547 transitions. [2021-08-21 18:16:20,907 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4547 transitions. Word has length 49 [2021-08-21 18:16:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 4547 transitions. [2021-08-21 18:16:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4547 transitions. [2021-08-21 18:16:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:16:20,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:20,910 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:20,934 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 18:16:21,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 18:16:21,111 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:21,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1113802122, now seen corresponding path program 50 times [2021-08-21 18:16:21,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:21,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084163213] [2021-08-21 18:16:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:21,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:16:21,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084163213] [2021-08-21 18:16:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084163213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189462601] [2021-08-21 18:16:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:16:21,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:21,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:21,652 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 18:16:21,653 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 18:16:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:16:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:16:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:26,100 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:16:26,100 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:16:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:26,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189462601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:26,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:26,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-21 18:16:26,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606099404] [2021-08-21 18:16:26,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:16:26,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:16:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:16:26,212 INFO L87 Difference]: Start difference. First operand 2829 states and 4547 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:42,387 INFO L93 Difference]: Finished difference Result 11909 states and 18210 transitions. [2021-08-21 18:16:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-08-21 18:16:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:16:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:42,420 INFO L225 Difference]: With dead ends: 11909 [2021-08-21 18:16:42,420 INFO L226 Difference]: Without dead ends: 10956 [2021-08-21 18:16:42,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28534 ImplicationChecksByTransitivity, 12547.4ms TimeCoverageRelationStatistics Valid=9176, Invalid=62916, Unknown=0, NotChecked=0, Total=72092 [2021-08-21 18:16:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10956 states. [2021-08-21 18:16:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10956 to 2777. [2021-08-21 18:16:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 1.6041066282420748) internal successors, (4453), 2776 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 4453 transitions. [2021-08-21 18:16:42,469 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 4453 transitions. Word has length 49 [2021-08-21 18:16:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:42,469 INFO L470 AbstractCegarLoop]: Abstraction has 2777 states and 4453 transitions. [2021-08-21 18:16:42,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 4453 transitions. [2021-08-21 18:16:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:16:42,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:42,472 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:42,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:42,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:16:42,672 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1100849746, now seen corresponding path program 51 times [2021-08-21 18:16:42,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:42,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004332050] [2021-08-21 18:16:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:42,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:16:43,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:43,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004332050] [2021-08-21 18:16:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004332050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:43,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309757342] [2021-08-21 18:16:43,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:16:43,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:43,305 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 18:16:43,309 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 18:16:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:16:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:16:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:47,740 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:16:47,741 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:16:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309757342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:47,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:47,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-21 18:16:47,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858273686] [2021-08-21 18:16:47,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:16:47,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:47,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:16:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:16:47,852 INFO L87 Difference]: Start difference. First operand 2777 states and 4453 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:54,860 INFO L93 Difference]: Finished difference Result 8501 states and 12769 transitions. [2021-08-21 18:16:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-21 18:16:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:16:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:54,871 INFO L225 Difference]: With dead ends: 8501 [2021-08-21 18:16:54,872 INFO L226 Difference]: Without dead ends: 8386 [2021-08-21 18:16:54,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11054 ImplicationChecksByTransitivity, 6158.6ms TimeCoverageRelationStatistics Valid=3911, Invalid=27595, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 18:16:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8386 states. [2021-08-21 18:16:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8386 to 2847. [2021-08-21 18:16:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 1.6061138439915672) internal successors, (4571), 2846 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 4571 transitions. [2021-08-21 18:16:54,918 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 4571 transitions. Word has length 49 [2021-08-21 18:16:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:54,918 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 4571 transitions. [2021-08-21 18:16:54,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 4571 transitions. [2021-08-21 18:16:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:16:54,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:54,920 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:54,945 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 18:16:55,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:55,121 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:16:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2019932810, now seen corresponding path program 52 times [2021-08-21 18:16:55,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:55,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633160565] [2021-08-21 18:16:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:55,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:16:55,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:55,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633160565] [2021-08-21 18:16:55,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633160565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:55,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450558987] [2021-08-21 18:16:55,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:16:55,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:55,682 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 18:16:55,682 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 18:16:58,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:16:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:00,260 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:17:00,261 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:17:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:00,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450558987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:00,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:00,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-21 18:17:00,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961556230] [2021-08-21 18:17:00,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:17:00,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:17:00,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:17:00,374 INFO L87 Difference]: Start difference. First operand 2847 states and 4571 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:07,223 INFO L93 Difference]: Finished difference Result 8521 states and 12870 transitions. [2021-08-21 18:17:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-21 18:17:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:17:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:07,232 INFO L225 Difference]: With dead ends: 8521 [2021-08-21 18:17:07,233 INFO L226 Difference]: Without dead ends: 8430 [2021-08-21 18:17:07,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8920 ImplicationChecksByTransitivity, 5705.5ms TimeCoverageRelationStatistics Valid=3119, Invalid=23613, Unknown=0, NotChecked=0, Total=26732 [2021-08-21 18:17:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2021-08-21 18:17:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 2917. [2021-08-21 18:17:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 1.6073388203017833) internal successors, (4687), 2916 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4687 transitions. [2021-08-21 18:17:07,278 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4687 transitions. Word has length 49 [2021-08-21 18:17:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:07,278 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 4687 transitions. [2021-08-21 18:17:07,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4687 transitions. [2021-08-21 18:17:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:17:07,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:07,281 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:07,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:07,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 18:17:07,481 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:07,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1766372014, now seen corresponding path program 53 times [2021-08-21 18:17:07,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:07,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774421985] [2021-08-21 18:17:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:07,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:17:08,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:08,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774421985] [2021-08-21 18:17:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774421985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:08,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003383474] [2021-08-21 18:17:08,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:17:08,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:08,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:08,058 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 18:17:08,059 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 18:17:11,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:17:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:17:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:12,812 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:17:12,812 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:17:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003383474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:12,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:12,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2021-08-21 18:17:12,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138504123] [2021-08-21 18:17:12,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:17:12,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:17:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1970, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:17:12,923 INFO L87 Difference]: Start difference. First operand 2917 states and 4687 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:18,283 INFO L93 Difference]: Finished difference Result 6857 states and 10388 transitions. [2021-08-21 18:17:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-21 18:17:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:17:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:18,291 INFO L225 Difference]: With dead ends: 6857 [2021-08-21 18:17:18,291 INFO L226 Difference]: Without dead ends: 6790 [2021-08-21 18:17:18,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7027 ImplicationChecksByTransitivity, 5088.2ms TimeCoverageRelationStatistics Valid=2265, Invalid=19491, Unknown=0, NotChecked=0, Total=21756 [2021-08-21 18:17:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-08-21 18:17:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 2951. [2021-08-21 18:17:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.6084745762711865) internal successors, (4745), 2950 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4745 transitions. [2021-08-21 18:17:18,331 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4745 transitions. Word has length 49 [2021-08-21 18:17:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:18,331 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 4745 transitions. [2021-08-21 18:17:18,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4745 transitions. [2021-08-21 18:17:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:17:18,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:18,334 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:18,359 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 18:17:18,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:17:18,535 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1350461852, now seen corresponding path program 54 times [2021-08-21 18:17:18,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:18,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487181276] [2021-08-21 18:17:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:18,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:17:19,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487181276] [2021-08-21 18:17:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487181276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528004964] [2021-08-21 18:17:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:17:19,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:19,140 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 18:17:19,141 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 18:17:22,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:17:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:17:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:23,942 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:17:23,942 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:17:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:24,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528004964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:24,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:24,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-21 18:17:24,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160220018] [2021-08-21 18:17:24,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:17:24,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:17:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:17:24,052 INFO L87 Difference]: Start difference. First operand 2951 states and 4745 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:39,143 INFO L93 Difference]: Finished difference Result 11248 states and 17311 transitions. [2021-08-21 18:17:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-08-21 18:17:39,144 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:17:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:39,155 INFO L225 Difference]: With dead ends: 11248 [2021-08-21 18:17:39,155 INFO L226 Difference]: Without dead ends: 10396 [2021-08-21 18:17:39,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26988 ImplicationChecksByTransitivity, 11783.5ms TimeCoverageRelationStatistics Valid=8413, Invalid=59447, Unknown=0, NotChecked=0, Total=67860 [2021-08-21 18:17:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-08-21 18:17:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 3125. [2021-08-21 18:17:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.6033930857874519) internal successors, (5009), 3124 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5009 transitions. [2021-08-21 18:17:39,215 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5009 transitions. Word has length 49 [2021-08-21 18:17:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:39,215 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 5009 transitions. [2021-08-21 18:17:39,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5009 transitions. [2021-08-21 18:17:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:17:39,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:39,218 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:39,247 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 18:17:39,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:39,429 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:39,429 INFO L82 PathProgramCache]: Analyzing trace with hash -431378788, now seen corresponding path program 55 times [2021-08-21 18:17:39,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:39,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805590801] [2021-08-21 18:17:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:39,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:17:40,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805590801] [2021-08-21 18:17:40,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805590801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:40,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042793284] [2021-08-21 18:17:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:17:40,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:40,060 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 18:17:40,061 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 18:17:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:17:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:44,836 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:17:44,836 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:17:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:44,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042793284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:44,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:44,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-21 18:17:44,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116266604] [2021-08-21 18:17:44,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:17:44,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:17:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:17:44,944 INFO L87 Difference]: Start difference. First operand 3125 states and 5009 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:52,118 INFO L93 Difference]: Finished difference Result 8959 states and 13543 transitions. [2021-08-21 18:17:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-21 18:17:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:17:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:52,128 INFO L225 Difference]: With dead ends: 8959 [2021-08-21 18:17:52,128 INFO L226 Difference]: Without dead ends: 8868 [2021-08-21 18:17:52,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11386 ImplicationChecksByTransitivity, 6228.9ms TimeCoverageRelationStatistics Valid=3689, Invalid=28531, Unknown=0, NotChecked=0, Total=32220 [2021-08-21 18:17:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-08-21 18:17:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 3371. [2021-08-21 18:17:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3370 states have (on average 1.6062314540059348) internal successors, (5413), 3370 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 5413 transitions. [2021-08-21 18:17:52,182 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 5413 transitions. Word has length 49 [2021-08-21 18:17:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 3371 states and 5413 transitions. [2021-08-21 18:17:52,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 5413 transitions. [2021-08-21 18:17:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:17:52,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:52,185 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:52,210 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 18:17:52,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:52,386 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:17:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash 77283684, now seen corresponding path program 56 times [2021-08-21 18:17:52,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:52,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801010660] [2021-08-21 18:17:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:52,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:17:53,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:53,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801010660] [2021-08-21 18:17:53,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801010660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:53,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428407991] [2021-08-21 18:17:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:17:53,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:53,066 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 18:17:53,067 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 18:17:56,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:17:56,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:17:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:57,970 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:17:57,970 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:17:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:58,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428407991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:58,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:58,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-21 18:17:58,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713690710] [2021-08-21 18:17:58,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:17:58,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:17:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:17:58,078 INFO L87 Difference]: Start difference. First operand 3371 states and 5413 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:04,150 INFO L93 Difference]: Finished difference Result 7243 states and 11003 transitions. [2021-08-21 18:18:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-08-21 18:18:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:18:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:04,158 INFO L225 Difference]: With dead ends: 7243 [2021-08-21 18:18:04,158 INFO L226 Difference]: Without dead ends: 7176 [2021-08-21 18:18:04,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8835 ImplicationChecksByTransitivity, 5529.2ms TimeCoverageRelationStatistics Valid=2632, Invalid=23128, Unknown=0, NotChecked=0, Total=25760 [2021-08-21 18:18:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-08-21 18:18:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 3549. [2021-08-21 18:18:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3548 states have (on average 1.6104847801578355) internal successors, (5714), 3548 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 5714 transitions. [2021-08-21 18:18:04,210 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 5714 transitions. Word has length 49 [2021-08-21 18:18:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:04,210 INFO L470 AbstractCegarLoop]: Abstraction has 3549 states and 5714 transitions. [2021-08-21 18:18:04,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 5714 transitions. [2021-08-21 18:18:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:18:04,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:04,213 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:04,246 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 18:18:04,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:04,429 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1523483594, now seen corresponding path program 57 times [2021-08-21 18:18:04,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:04,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226673660] [2021-08-21 18:18:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:04,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:18:04,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:04,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226673660] [2021-08-21 18:18:04,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226673660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:04,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235260168] [2021-08-21 18:18:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:18:04,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:04,976 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 18:18:04,976 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 18:18:08,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:18:08,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:18:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:09,918 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:18:09,918 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:18:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:10,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235260168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:10,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:10,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:18:10,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817673839] [2021-08-21 18:18:10,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:18:10,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:18:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:18:10,024 INFO L87 Difference]: Start difference. First operand 3549 states and 5714 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:22,921 INFO L93 Difference]: Finished difference Result 10002 states and 15379 transitions. [2021-08-21 18:18:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-08-21 18:18:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:18:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:22,932 INFO L225 Difference]: With dead ends: 10002 [2021-08-21 18:18:22,932 INFO L226 Difference]: Without dead ends: 9358 [2021-08-21 18:18:22,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23603 ImplicationChecksByTransitivity, 10100.5ms TimeCoverageRelationStatistics Valid=6293, Invalid=53487, Unknown=0, NotChecked=0, Total=59780 [2021-08-21 18:18:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9358 states. [2021-08-21 18:18:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9358 to 3747. [2021-08-21 18:18:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 1.6073144687666845) internal successors, (6021), 3746 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 6021 transitions. [2021-08-21 18:18:23,007 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 6021 transitions. Word has length 49 [2021-08-21 18:18:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 6021 transitions. [2021-08-21 18:18:23,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 6021 transitions. [2021-08-21 18:18:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:18:23,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:23,011 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:23,037 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 18:18:23,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:18:23,212 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2032146066, now seen corresponding path program 58 times [2021-08-21 18:18:23,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:23,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223176084] [2021-08-21 18:18:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:23,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:18:23,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:23,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223176084] [2021-08-21 18:18:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223176084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:23,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723746107] [2021-08-21 18:18:23,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:18:23,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:23,732 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 18:18:23,733 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 18:18:27,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:18:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:18:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:28,779 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:18:28,780 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:18:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:28,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723746107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:28,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:28,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:18:28,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920876371] [2021-08-21 18:18:28,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:18:28,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:28,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:18:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:18:28,882 INFO L87 Difference]: Start difference. First operand 3747 states and 6021 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:35,523 INFO L93 Difference]: Finished difference Result 7465 states and 11341 transitions. [2021-08-21 18:18:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-08-21 18:18:35,524 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:18:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:35,532 INFO L225 Difference]: With dead ends: 7465 [2021-08-21 18:18:35,532 INFO L226 Difference]: Without dead ends: 7398 [2021-08-21 18:18:35,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11614 ImplicationChecksByTransitivity, 5722.6ms TimeCoverageRelationStatistics Valid=3084, Invalid=28422, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 18:18:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7398 states. [2021-08-21 18:18:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7398 to 4083. [2021-08-21 18:18:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 1.609750122488976) internal successors, (6571), 4082 states have internal predecessors, (6571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 6571 transitions. [2021-08-21 18:18:35,604 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 6571 transitions. Word has length 49 [2021-08-21 18:18:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:35,604 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 6571 transitions. [2021-08-21 18:18:35,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 6571 transitions. [2021-08-21 18:18:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:18:35,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:35,608 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:35,634 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 18:18:35,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 18:18:35,809 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1305018404, now seen corresponding path program 59 times [2021-08-21 18:18:35,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:35,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20513221] [2021-08-21 18:18:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:35,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:18:36,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:36,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20513221] [2021-08-21 18:18:36,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20513221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:36,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327034393] [2021-08-21 18:18:36,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:18:36,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:36,390 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 18:18:36,428 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 18:18:40,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:18:40,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:40,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:18:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:41,847 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 18:18:41,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 70 treesize of output 49 [2021-08-21 18:18:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327034393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:41,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:41,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-21 18:18:41,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295709628] [2021-08-21 18:18:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:18:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:18:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:18:41,969 INFO L87 Difference]: Start difference. First operand 4083 states and 6571 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:52,321 INFO L93 Difference]: Finished difference Result 8342 states and 12762 transitions. [2021-08-21 18:18:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-08-21 18:18:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:18:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:52,330 INFO L225 Difference]: With dead ends: 8342 [2021-08-21 18:18:52,330 INFO L226 Difference]: Without dead ends: 7933 [2021-08-21 18:18:52,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17495 ImplicationChecksByTransitivity, 7893.2ms TimeCoverageRelationStatistics Valid=4115, Invalid=40617, Unknown=0, NotChecked=0, Total=44732 [2021-08-21 18:18:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2021-08-21 18:18:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 4117. [2021-08-21 18:18:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4117 states, 4116 states have (on average 1.6093294460641399) internal successors, (6624), 4116 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 6624 transitions. [2021-08-21 18:18:52,397 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 6624 transitions. Word has length 49 [2021-08-21 18:18:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 4117 states and 6624 transitions. [2021-08-21 18:18:52,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 6624 transitions. [2021-08-21 18:18:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:18:52,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:52,403 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:52,438 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 18:18:52,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:18:52,625 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:18:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1079030434, now seen corresponding path program 60 times [2021-08-21 18:18:52,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:52,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296305497] [2021-08-21 18:18:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:52,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:18:53,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296305497] [2021-08-21 18:18:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296305497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972921502] [2021-08-21 18:18:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:18:53,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:53,437 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 18:18:53,438 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 18:18:57,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:18:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:18:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:58,703 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:18:58,704 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:18:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:58,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972921502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:58,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:58,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:18:58,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306845952] [2021-08-21 18:18:58,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:18:58,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:18:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:18:58,812 INFO L87 Difference]: Start difference. First operand 4117 states and 6624 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 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 18:19:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:03,319 INFO L93 Difference]: Finished difference Result 8329 states and 12764 transitions. [2021-08-21 18:19:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-21 18:19:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:19:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:03,329 INFO L225 Difference]: With dead ends: 8329 [2021-08-21 18:19:03,330 INFO L226 Difference]: Without dead ends: 8262 [2021-08-21 18:19:03,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5444 ImplicationChecksByTransitivity, 4304.2ms TimeCoverageRelationStatistics Valid=1773, Invalid=14997, Unknown=0, NotChecked=0, Total=16770 [2021-08-21 18:19:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-08-21 18:19:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 4153. [2021-08-21 18:19:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 1.609344894026975) internal successors, (6682), 4152 states have internal predecessors, (6682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 6682 transitions. [2021-08-21 18:19:03,385 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 6682 transitions. Word has length 49 [2021-08-21 18:19:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:03,385 INFO L470 AbstractCegarLoop]: Abstraction has 4153 states and 6682 transitions. [2021-08-21 18:19:03,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 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 18:19:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 6682 transitions. [2021-08-21 18:19:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:19:03,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:03,389 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:03,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:19:03,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:03,590 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 858155218, now seen corresponding path program 61 times [2021-08-21 18:19:03,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:03,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915582582] [2021-08-21 18:19:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:03,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:19:04,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915582582] [2021-08-21 18:19:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915582582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359805105] [2021-08-21 18:19:04,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:19:04,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:04,079 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 18:19:04,080 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 18:19:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:19:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:09,387 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:19:09,387 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:19:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:09,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359805105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:09,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:09,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-21 18:19:09,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982475430] [2021-08-21 18:19:09,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:19:09,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:19:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:19:09,488 INFO L87 Difference]: Start difference. First operand 4153 states and 6682 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 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 18:19:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:15,399 INFO L93 Difference]: Finished difference Result 8894 states and 13523 transitions. [2021-08-21 18:19:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-21 18:19:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:19:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:15,409 INFO L225 Difference]: With dead ends: 8894 [2021-08-21 18:19:15,409 INFO L226 Difference]: Without dead ends: 8827 [2021-08-21 18:19:15,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8280 ImplicationChecksByTransitivity, 4834.2ms TimeCoverageRelationStatistics Valid=2411, Invalid=21151, Unknown=0, NotChecked=0, Total=23562 [2021-08-21 18:19:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8827 states. [2021-08-21 18:19:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8827 to 4333. [2021-08-21 18:19:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4333 states, 4332 states have (on average 1.6124192059095106) internal successors, (6985), 4332 states have internal predecessors, (6985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4333 states to 4333 states and 6985 transitions. [2021-08-21 18:19:15,480 INFO L78 Accepts]: Start accepts. Automaton has 4333 states and 6985 transitions. Word has length 49 [2021-08-21 18:19:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:15,480 INFO L470 AbstractCegarLoop]: Abstraction has 4333 states and 6985 transitions. [2021-08-21 18:19:15,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 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 18:19:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4333 states and 6985 transitions. [2021-08-21 18:19:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:19:15,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:15,487 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:15,525 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 18:19:15,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:15,701 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 131027556, now seen corresponding path program 62 times [2021-08-21 18:19:15,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:15,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124813847] [2021-08-21 18:19:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:15,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:19:16,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:16,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124813847] [2021-08-21 18:19:16,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124813847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:16,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241619906] [2021-08-21 18:19:16,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:19:16,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:16,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:16,160 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 18:19:16,161 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 18:19:20,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:19:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:19:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:21,626 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:19:21,627 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:19:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241619906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:21,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:21,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-21 18:19:21,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130069533] [2021-08-21 18:19:21,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:19:21,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:19:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:19:21,727 INFO L87 Difference]: Start difference. First operand 4333 states and 6985 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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 18:19:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:30,000 INFO L93 Difference]: Finished difference Result 10596 states and 16290 transitions. [2021-08-21 18:19:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-08-21 18:19:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:19:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:30,011 INFO L225 Difference]: With dead ends: 10596 [2021-08-21 18:19:30,011 INFO L226 Difference]: Without dead ends: 10153 [2021-08-21 18:19:30,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13699 ImplicationChecksByTransitivity, 6478.6ms TimeCoverageRelationStatistics Valid=3564, Invalid=31968, Unknown=0, NotChecked=0, Total=35532 [2021-08-21 18:19:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10153 states. [2021-08-21 18:19:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10153 to 4607. [2021-08-21 18:19:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 1.615501519756839) internal successors, (7441), 4606 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 7441 transitions. [2021-08-21 18:19:30,072 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 7441 transitions. Word has length 49 [2021-08-21 18:19:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:30,072 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 7441 transitions. [2021-08-21 18:19:30,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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 18:19:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 7441 transitions. [2021-08-21 18:19:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:19:30,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:30,077 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:30,103 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 18:19:30,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 18:19:30,277 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -866092198, now seen corresponding path program 63 times [2021-08-21 18:19:30,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:30,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224951452] [2021-08-21 18:19:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:30,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:19:30,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:30,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224951452] [2021-08-21 18:19:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224951452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495067422] [2021-08-21 18:19:30,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:19:30,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:30,768 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 18:19:30,768 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 18:19:34,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:19:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:19:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:36,312 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:19:36,312 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:19:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495067422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:36,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:36,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-21 18:19:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810608210] [2021-08-21 18:19:36,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:19:36,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:19:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:19:36,414 INFO L87 Difference]: Start difference. First operand 4607 states and 7441 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 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 18:19:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:41,617 INFO L93 Difference]: Finished difference Result 9379 states and 14420 transitions. [2021-08-21 18:19:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 18:19:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:19:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:41,627 INFO L225 Difference]: With dead ends: 9379 [2021-08-21 18:19:41,627 INFO L226 Difference]: Without dead ends: 9312 [2021-08-21 18:19:41,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 4197.7ms TimeCoverageRelationStatistics Valid=1839, Invalid=16521, Unknown=0, NotChecked=0, Total=18360 [2021-08-21 18:19:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-08-21 18:19:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 4607. [2021-08-21 18:19:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 1.615501519756839) internal successors, (7441), 4606 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 7441 transitions. [2021-08-21 18:19:41,691 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 7441 transitions. Word has length 49 [2021-08-21 18:19:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:41,691 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 7441 transitions. [2021-08-21 18:19:41,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 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 18:19:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 7441 transitions. [2021-08-21 18:19:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:19:41,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:41,696 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:41,722 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 18:19:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:19:41,896 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1376982050, now seen corresponding path program 64 times [2021-08-21 18:19:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:41,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291819498] [2021-08-21 18:19:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:41,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:19:42,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291819498] [2021-08-21 18:19:42,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291819498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746625479] [2021-08-21 18:19:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:19:42,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:42,356 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 18:19:42,357 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 18:19:46,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:19:46,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:19:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:48,039 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:19:48,040 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:19:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:48,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746625479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:48,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:48,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-21 18:19:48,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126195676] [2021-08-21 18:19:48,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:19:48,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:19:48,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:19:48,144 INFO L87 Difference]: Start difference. First operand 4607 states and 7441 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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 18:19:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:55,958 INFO L93 Difference]: Finished difference Result 12274 states and 19022 transitions. [2021-08-21 18:19:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-21 18:19:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:19:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:55,971 INFO L225 Difference]: With dead ends: 12274 [2021-08-21 18:19:55,971 INFO L226 Difference]: Without dead ends: 11814 [2021-08-21 18:19:55,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12505 ImplicationChecksByTransitivity, 6084.3ms TimeCoverageRelationStatistics Valid=3191, Invalid=29751, Unknown=0, NotChecked=0, Total=32942 [2021-08-21 18:19:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11814 states. [2021-08-21 18:19:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11814 to 4723. [2021-08-21 18:19:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4723 states, 4722 states have (on average 1.6224057602710715) internal successors, (7661), 4722 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 7661 transitions. [2021-08-21 18:19:56,044 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 7661 transitions. Word has length 49 [2021-08-21 18:19:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:56,044 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 7661 transitions. [2021-08-21 18:19:56,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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 18:19:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 7661 transitions. [2021-08-21 18:19:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:19:56,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:56,048 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:56,075 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 18:19:56,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:56,249 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:19:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash -142856798, now seen corresponding path program 65 times [2021-08-21 18:19:56,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:56,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883478372] [2021-08-21 18:19:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:56,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:19:56,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:56,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883478372] [2021-08-21 18:19:56,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883478372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:56,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248322478] [2021-08-21 18:19:56,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:19:56,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:56,777 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 18:19:56,779 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 18:20:01,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:20:01,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:20:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:03,081 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-21 18:20:03,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 73 treesize of output 53 [2021-08-21 18:20:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:03,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248322478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:03,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:03,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-21 18:20:03,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937677427] [2021-08-21 18:20:03,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:20:03,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:20:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:20:03,215 INFO L87 Difference]: Start difference. First operand 4723 states and 7661 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:14,230 INFO L93 Difference]: Finished difference Result 14463 states and 22458 transitions. [2021-08-21 18:20:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-08-21 18:20:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:20:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:14,250 INFO L225 Difference]: With dead ends: 14463 [2021-08-21 18:20:14,250 INFO L226 Difference]: Without dead ends: 14007 [2021-08-21 18:20:14,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15028 ImplicationChecksByTransitivity, 7213.7ms TimeCoverageRelationStatistics Valid=3547, Invalid=34673, Unknown=0, NotChecked=0, Total=38220 [2021-08-21 18:20:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2021-08-21 18:20:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 5379. [2021-08-21 18:20:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5378 states have (on average 1.64540721457791) internal successors, (8849), 5378 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 8849 transitions. [2021-08-21 18:20:14,349 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 8849 transitions. Word has length 49 [2021-08-21 18:20:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:14,349 INFO L470 AbstractCegarLoop]: Abstraction has 5379 states and 8849 transitions. [2021-08-21 18:20:14,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 8849 transitions. [2021-08-21 18:20:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:20:14,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:14,356 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:14,385 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 18:20:14,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 18:20:14,557 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1952323248, now seen corresponding path program 66 times [2021-08-21 18:20:14,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:14,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456616350] [2021-08-21 18:20:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:14,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:15,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456616350] [2021-08-21 18:20:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456616350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:15,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810675404] [2021-08-21 18:20:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:15,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:15,105 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 18:20:15,106 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 18:20:19,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:20:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:20:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:20,902 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:20:20,903 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:20:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:21,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810675404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:21,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:21,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:20:21,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532468403] [2021-08-21 18:20:21,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:20:21,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:20:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:20:21,012 INFO L87 Difference]: Start difference. First operand 5379 states and 8849 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:30,041 INFO L93 Difference]: Finished difference Result 14486 states and 22338 transitions. [2021-08-21 18:20:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-21 18:20:30,042 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:20:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:30,059 INFO L225 Difference]: With dead ends: 14486 [2021-08-21 18:20:30,059 INFO L226 Difference]: Without dead ends: 14355 [2021-08-21 18:20:30,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11798 ImplicationChecksByTransitivity, 7628.9ms TimeCoverageRelationStatistics Valid=4808, Invalid=28864, Unknown=0, NotChecked=0, Total=33672 [2021-08-21 18:20:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-08-21 18:20:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 5511. [2021-08-21 18:20:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 1.644464609800363) internal successors, (9061), 5510 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 9061 transitions. [2021-08-21 18:20:30,146 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 9061 transitions. Word has length 49 [2021-08-21 18:20:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:30,146 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 9061 transitions. [2021-08-21 18:20:30,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 9061 transitions. [2021-08-21 18:20:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:20:30,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:30,151 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:30,181 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 18:20:30,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:20:30,352 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1081659548, now seen corresponding path program 67 times [2021-08-21 18:20:30,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:30,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870777638] [2021-08-21 18:20:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:30,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:30,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:30,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870777638] [2021-08-21 18:20:30,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870777638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:30,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078383218] [2021-08-21 18:20:30,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:30,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:30,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:30,958 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 18:20:30,958 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 18:20:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:20:35,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:36,822 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:20:36,822 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:20:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:36,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078383218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:36,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:36,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:20:36,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29773539] [2021-08-21 18:20:36,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:20:36,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:20:36,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:20:36,931 INFO L87 Difference]: Start difference. First operand 5511 states and 9061 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:42,544 INFO L93 Difference]: Finished difference Result 13928 states and 21626 transitions. [2021-08-21 18:20:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-21 18:20:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:20:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:42,584 INFO L225 Difference]: With dead ends: 13928 [2021-08-21 18:20:42,584 INFO L226 Difference]: Without dead ends: 13837 [2021-08-21 18:20:42,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6987 ImplicationChecksByTransitivity, 5082.1ms TimeCoverageRelationStatistics Valid=2857, Invalid=18899, Unknown=0, NotChecked=0, Total=21756 [2021-08-21 18:20:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2021-08-21 18:20:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 5519. [2021-08-21 18:20:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 1.6442551649148243) internal successors, (9073), 5518 states have internal predecessors, (9073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 9073 transitions. [2021-08-21 18:20:42,710 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 9073 transitions. Word has length 49 [2021-08-21 18:20:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:42,710 INFO L470 AbstractCegarLoop]: Abstraction has 5519 states and 9073 transitions. [2021-08-21 18:20:42,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 9073 transitions. [2021-08-21 18:20:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:20:42,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:42,717 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:42,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:42,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:20:42,917 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:42,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1039253968, now seen corresponding path program 68 times [2021-08-21 18:20:42,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:42,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674434809] [2021-08-21 18:20:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:42,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:43,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674434809] [2021-08-21 18:20:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674434809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524297603] [2021-08-21 18:20:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:43,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:43,418 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 18:20:43,420 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 18:20:48,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:20:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:49,459 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:20:49,459 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:20:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:49,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524297603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:49,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:49,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2021-08-21 18:20:49,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265937338] [2021-08-21 18:20:49,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:20:49,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:20:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:20:49,582 INFO L87 Difference]: Start difference. First operand 5519 states and 9073 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:54,978 INFO L93 Difference]: Finished difference Result 10786 states and 16796 transitions. [2021-08-21 18:20:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-21 18:20:54,978 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:20:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:54,997 INFO L225 Difference]: With dead ends: 10786 [2021-08-21 18:20:54,997 INFO L226 Difference]: Without dead ends: 10723 [2021-08-21 18:20:54,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6936 ImplicationChecksByTransitivity, 5123.9ms TimeCoverageRelationStatistics Valid=2496, Invalid=19260, Unknown=0, NotChecked=0, Total=21756 [2021-08-21 18:20:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-08-21 18:20:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 5553. [2021-08-21 18:20:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 1.6439121037463977) internal successors, (9127), 5552 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 9127 transitions. [2021-08-21 18:20:55,098 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 9127 transitions. Word has length 49 [2021-08-21 18:20:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:55,098 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 9127 transitions. [2021-08-21 18:20:55,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 9127 transitions. [2021-08-21 18:20:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:20:55,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:55,104 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:55,132 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 18:20:55,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 18:20:55,304 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:20:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1861018416, now seen corresponding path program 69 times [2021-08-21 18:20:55,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:55,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320511666] [2021-08-21 18:20:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:55,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:55,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:55,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320511666] [2021-08-21 18:20:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320511666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:55,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319180299] [2021-08-21 18:20:55,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:55,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:55,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:55,821 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 18:20:55,821 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 18:21:00,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:21:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:21:00,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:01,812 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:21:01,813 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:21:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:01,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319180299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:01,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:01,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 43 [2021-08-21 18:21:01,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262330174] [2021-08-21 18:21:01,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:21:01,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:21:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:21:01,911 INFO L87 Difference]: Start difference. First operand 5553 states and 9127 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:06,997 INFO L93 Difference]: Finished difference Result 10582 states and 16574 transitions. [2021-08-21 18:21:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-21 18:21:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:21:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:07,010 INFO L225 Difference]: With dead ends: 10582 [2021-08-21 18:21:07,011 INFO L226 Difference]: Without dead ends: 10515 [2021-08-21 18:21:07,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 4703.5ms TimeCoverageRelationStatistics Valid=2146, Invalid=18446, Unknown=0, NotChecked=0, Total=20592 [2021-08-21 18:21:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10515 states. [2021-08-21 18:21:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10515 to 5553. [2021-08-21 18:21:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 1.6439121037463977) internal successors, (9127), 5552 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 9127 transitions. [2021-08-21 18:21:07,100 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 9127 transitions. Word has length 49 [2021-08-21 18:21:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:07,100 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 9127 transitions. [2021-08-21 18:21:07,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 9127 transitions. [2021-08-21 18:21:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:21:07,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:07,106 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:07,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:07,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:07,306 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1350128564, now seen corresponding path program 70 times [2021-08-21 18:21:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:07,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556885131] [2021-08-21 18:21:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:07,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:21:07,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:07,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556885131] [2021-08-21 18:21:07,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556885131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:07,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478156191] [2021-08-21 18:21:07,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:07,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:07,738 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 18:21:07,738 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 18:21:12,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:21:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:14,010 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:21:14,010 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:21:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:14,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478156191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:14,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:14,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 42 [2021-08-21 18:21:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167446226] [2021-08-21 18:21:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:21:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:21:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:21:14,118 INFO L87 Difference]: Start difference. First operand 5553 states and 9127 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:22,492 INFO L93 Difference]: Finished difference Result 13335 states and 20956 transitions. [2021-08-21 18:21:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-08-21 18:21:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:21:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:22,506 INFO L225 Difference]: With dead ends: 13335 [2021-08-21 18:21:22,506 INFO L226 Difference]: Without dead ends: 12886 [2021-08-21 18:21:22,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14026 ImplicationChecksByTransitivity, 6380.9ms TimeCoverageRelationStatistics Valid=3639, Invalid=32651, Unknown=0, NotChecked=0, Total=36290 [2021-08-21 18:21:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12886 states. [2021-08-21 18:21:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12886 to 5785. [2021-08-21 18:21:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 5784 states have (on average 1.647994467496542) internal successors, (9532), 5784 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 9532 transitions. [2021-08-21 18:21:22,586 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 9532 transitions. Word has length 49 [2021-08-21 18:21:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:22,587 INFO L470 AbstractCegarLoop]: Abstraction has 5785 states and 9532 transitions. [2021-08-21 18:21:22,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 9532 transitions. [2021-08-21 18:21:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:21:22,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:22,592 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:22,620 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 18:21:22,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:22,797 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:22,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1483705058, now seen corresponding path program 71 times [2021-08-21 18:21:22,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:22,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347751744] [2021-08-21 18:21:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:22,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:21:23,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:23,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347751744] [2021-08-21 18:21:23,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347751744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:23,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676353535] [2021-08-21 18:21:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:23,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:23,244 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 18:21:23,245 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 18:21:28,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:21:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:21:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:29,508 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:21:29,508 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:21:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676353535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:29,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:29,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 44 [2021-08-21 18:21:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357733271] [2021-08-21 18:21:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:21:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:21:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:21:29,631 INFO L87 Difference]: Start difference. First operand 5785 states and 9532 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:38,241 INFO L93 Difference]: Finished difference Result 15166 states and 23938 transitions. [2021-08-21 18:21:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-21 18:21:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:21:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:38,262 INFO L225 Difference]: With dead ends: 15166 [2021-08-21 18:21:38,263 INFO L226 Difference]: Without dead ends: 14729 [2021-08-21 18:21:38,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11371 ImplicationChecksByTransitivity, 6459.0ms TimeCoverageRelationStatistics Valid=4024, Invalid=28556, Unknown=0, NotChecked=0, Total=32580 [2021-08-21 18:21:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14729 states. [2021-08-21 18:21:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14729 to 6025. [2021-08-21 18:21:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 1.6399402390438247) internal successors, (9879), 6024 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 9879 transitions. [2021-08-21 18:21:38,367 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 9879 transitions. Word has length 49 [2021-08-21 18:21:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:38,368 INFO L470 AbstractCegarLoop]: Abstraction has 6025 states and 9879 transitions. [2021-08-21 18:21:38,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 9879 transitions. [2021-08-21 18:21:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:21:38,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:38,374 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:38,405 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 18:21:38,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:38,575 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1507872158, now seen corresponding path program 72 times [2021-08-21 18:21:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:38,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729109478] [2021-08-21 18:21:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:38,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:39,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729109478] [2021-08-21 18:21:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729109478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:39,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000809995] [2021-08-21 18:21:39,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:39,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:39,115 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 18:21:39,116 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 18:21:44,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:21:44,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:44,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:21:44,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:45,539 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:21:45,539 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-08-21 18:21:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000809995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:45,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:21:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647969771] [2021-08-21 18:21:45,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:21:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:21:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:21:45,644 INFO L87 Difference]: Start difference. First operand 6025 states and 9879 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-21 18:21:50,512 WARN L223 SmtUtils]: Removed 4 from assertion stack [2021-08-21 18:21:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 18:21:50,514 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:21:50,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:21:50,514 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 18:21:50,548 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 18:21:50,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 18:21:50,717 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (6025states) and FLOYD_HOARE automaton (currently 96 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 18ms.. [2021-08-21 18:21:50,718 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:21:50,719 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:21:50,719 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:21:50,727 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:21:50,727 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:21:50,728 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:21:50 BasicIcfg [2021-08-21 18:21:50,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:21:50,729 INFO L168 Benchmark]: Toolchain (without parser) took 727181.88 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 177.1 MB in the beginning and 356.0 MB in the end (delta: -178.9 MB). Peak memory consumption was 848.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:50,729 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.51 ms. Allocated memory is still 196.1 MB. Free memory is still 178.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:21:50,729 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.80 ms. Allocated memory is still 196.1 MB. Free memory was 177.0 MB in the beginning and 175.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:50,729 INFO L168 Benchmark]: Boogie Preprocessor took 14.36 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:50,729 INFO L168 Benchmark]: RCFGBuilder took 374.91 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 161.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:50,729 INFO L168 Benchmark]: TraceAbstraction took 726764.30 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 161.2 MB in the beginning and 356.0 MB in the end (delta: -194.8 MB). Peak memory consumption was 832.5 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:50,730 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 0.51 ms. Allocated memory is still 196.1 MB. Free memory is still 178.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.80 ms. Allocated memory is still 196.1 MB. Free memory was 177.0 MB in the beginning and 175.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.36 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.91 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 161.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 726764.30 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 161.2 MB in the beginning and 356.0 MB in the end (delta: -194.8 MB). Peak memory consumption was 832.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 258, positive: 212, positive conditional: 212, positive unconditional: 0, negative: 46, negative conditional: 46, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 237, positive: 212, positive conditional: 0, positive unconditional: 212, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 69, positive: 64, positive conditional: 0, positive unconditional: 64, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 69, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 17, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 237, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 69, unknown conditional: 0, unknown unconditional: 69] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Independence queries for same thread: 21 - 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (6025states) and FLOYD_HOARE automaton (currently 96 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 18ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6025states) and FLOYD_HOARE automaton (currently 96 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 18ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6025states) and FLOYD_HOARE automaton (currently 96 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 18ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6025states) and FLOYD_HOARE automaton (currently 96 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 18ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 726685.9ms, OverallIterations: 75, TraceHistogramMax: 5, EmptinessCheckTime: 223.2ms, AutomataDifference: 436414.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 111.8ms, PartialOrderReductionTime: 98.1ms, HoareTripleCheckerStatistics: 3758 SDtfs, 25110 SDslu, 65105 SDs, 0 SdLazy, 192324 SolverSat, 15789 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 143938.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11418 GetRequests, 2086 SyntacticMatches, 22 SemanticMatches, 9309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507153 ImplicationChecksByTransitivity, 327281.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6025occurred in iteration=74, InterpolantAutomatonStates: 7016, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2877.0ms AutomataMinimizationTime, 74 MinimizatonAttempts, 236765 StatesRemovedByMinimization, 73 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 339.2ms SsaConstructionTime, 1562.9ms SatisfiabilityAnalysisTime, 118498.2ms InterpolantComputationTime, 6288 NumberOfCodeBlocks, 6288 NumberOfCodeBlocksAsserted, 317 NumberOfCheckSat, 6141 ConstructedInterpolants, 58 QuantifiedInterpolants, 115757 SizeOfPredicates, 561 NumberOfNonLiveVariables, 7680 ConjunctsInSsa, 2409 ConjunctsInUnsatCore, 147 InterpolantComputations, 3 PerfectInterpolantSequences, 274/6901 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