/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-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:22:15,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:22:15,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:22:15,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:22:15,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:22:15,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:22:15,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:22:15,262 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 18:22:15,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:22:15,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:22:15,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:22:15,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:22:15,277 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:22:15,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:22:15,278 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:22:15,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:22:15,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:22:15,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:22:15,280 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:22:15,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:22:15,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:22:15,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:22:15,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:22:15,585 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:22:15,589 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:22:15,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2021-08-21 18:22:15,590 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2021-08-21 18:22:15,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:22:15,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:22:15,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:22:15,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:22:15,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:22:15,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:22:15,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:22:15,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:22:15,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:22:15,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:22:15,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:22:15,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:22:15,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:22:15,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/1) ... [2021-08-21 18:22:15,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:22:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:15,683 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 18:22:15,686 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 18:22:15,717 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:22:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:22:15,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:22:15,717 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:22:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:22:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:22:15,718 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:22:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:22:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:22:15,718 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:22:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:22:15,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:22:15,719 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 18:22:15,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:22:15,975 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:22:15,976 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:22:15 BoogieIcfgContainer [2021-08-21 18:22:15,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:22:15,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:22:15,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:22:15,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:22:15,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:15" (1/2) ... [2021-08-21 18:22:15,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ad64f0 and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:22:15, skipping insertion in model container [2021-08-21 18:22:15,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:22:15" (2/2) ... [2021-08-21 18:22:15,985 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2021-08-21 18:22:15,989 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:22:15,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:22:15,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:22:15,990 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:22:16,042 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:22:16,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:22:16,075 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 18:22:16,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:22:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 263 states have (on average 1.650190114068441) internal successors, (434), 345 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:22:16,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:16,196 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] [2021-08-21 18:22:16,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2072770532, now seen corresponding path program 1 times [2021-08-21 18:22:16,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:16,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749107130] [2021-08-21 18:22:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:16,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:16,313 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 18:22:16,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:16,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749107130] [2021-08-21 18:22:16,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749107130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:16,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:16,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:22:16,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730543670] [2021-08-21 18:22:16,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:22:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:22:16,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:16,333 INFO L87 Difference]: Start difference. First operand has 346 states, 263 states have (on average 1.650190114068441) internal successors, (434), 345 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:16,369 INFO L93 Difference]: Finished difference Result 403 states and 498 transitions. [2021-08-21 18:22:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:22:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:22:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:16,381 INFO L225 Difference]: With dead ends: 403 [2021-08-21 18:22:16,381 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:22:16,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:22:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2021-08-21 18:22:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.4477611940298507) internal successors, (291), 201 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2021-08-21 18:22:16,426 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 21 [2021-08-21 18:22:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:16,427 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2021-08-21 18:22:16,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2021-08-21 18:22:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:22:16,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:16,433 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, 1] [2021-08-21 18:22:16,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:22:16,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1509451541, now seen corresponding path program 1 times [2021-08-21 18:22:16,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:16,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178964549] [2021-08-21 18:22:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:16,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:16,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:16,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178964549] [2021-08-21 18:22:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178964549] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:16,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:16,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:22:16,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583128304] [2021-08-21 18:22:16,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:22:16,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:22:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:16,522 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:16,532 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-08-21 18:22:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:22:16,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:22:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:16,534 INFO L225 Difference]: With dead ends: 211 [2021-08-21 18:22:16,534 INFO L226 Difference]: Without dead ends: 208 [2021-08-21 18:22:16,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-21 18:22:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-08-21 18:22:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4466019417475728) internal successors, (298), 206 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 298 transitions. [2021-08-21 18:22:16,541 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 298 transitions. Word has length 26 [2021-08-21 18:22:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:16,541 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 298 transitions. [2021-08-21 18:22:16,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 298 transitions. [2021-08-21 18:22:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:22:16,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:16,542 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, 1, 1, 1] [2021-08-21 18:22:16,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:22:16,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2138158455, now seen corresponding path program 1 times [2021-08-21 18:22:16,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:16,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948825798] [2021-08-21 18:22:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:16,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:16,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:16,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948825798] [2021-08-21 18:22:16,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948825798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:16,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366732684] [2021-08-21 18:22:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:16,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:16,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:16,643 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 18:22:16,657 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 18:22:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:22:16,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:22:16,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366732684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:16,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:16,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-08-21 18:22:16,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175387127] [2021-08-21 18:22:16,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:16,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:16,941 INFO L87 Difference]: Start difference. First operand 207 states and 298 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:17,066 INFO L93 Difference]: Finished difference Result 590 states and 856 transitions. [2021-08-21 18:22:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:22:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:22:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:17,070 INFO L225 Difference]: With dead ends: 590 [2021-08-21 18:22:17,070 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 18:22:17,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:22:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 18:22:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 345. [2021-08-21 18:22:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4651162790697674) internal successors, (504), 344 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 504 transitions. [2021-08-21 18:22:17,080 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 504 transitions. Word has length 28 [2021-08-21 18:22:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:17,081 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 504 transitions. [2021-08-21 18:22:17,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 504 transitions. [2021-08-21 18:22:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:22:17,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:17,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:17,114 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 18:22:17,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:17,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1460533752, now seen corresponding path program 2 times [2021-08-21 18:22:17,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:17,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790073241] [2021-08-21 18:22:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:17,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:17,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:17,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790073241] [2021-08-21 18:22:17,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790073241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:17,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788600972] [2021-08-21 18:22:17,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:17,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:17,408 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 18:22:17,409 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 18:22:17,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:22:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:22:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:22:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:17,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788600972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:17,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:17,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-08-21 18:22:17,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408982652] [2021-08-21 18:22:17,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:22:17,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:22:17,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:22:17,823 INFO L87 Difference]: Start difference. First operand 345 states and 504 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 18:22:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:18,359 INFO L93 Difference]: Finished difference Result 1608 states and 2394 transitions. [2021-08-21 18:22:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:22:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 35 [2021-08-21 18:22:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:18,364 INFO L225 Difference]: With dead ends: 1608 [2021-08-21 18:22:18,364 INFO L226 Difference]: Without dead ends: 1050 [2021-08-21 18:22:18,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:22:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-08-21 18:22:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 500. [2021-08-21 18:22:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.653306613226453) internal successors, (825), 499 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 825 transitions. [2021-08-21 18:22:18,383 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 825 transitions. Word has length 35 [2021-08-21 18:22:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:18,384 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 825 transitions. [2021-08-21 18:22:18,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 18:22:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 825 transitions. [2021-08-21 18:22:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:22:18,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:18,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:18,406 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 18:22:18,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 18:22:18,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash -775864724, now seen corresponding path program 3 times [2021-08-21 18:22:18,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:18,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077317523] [2021-08-21 18:22:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:18,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:22:18,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:18,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077317523] [2021-08-21 18:22:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077317523] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:18,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:18,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:22:18,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596949945] [2021-08-21 18:22:18,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:22:18,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:22:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:18,666 INFO L87 Difference]: Start difference. First operand 500 states and 825 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:18,684 INFO L93 Difference]: Finished difference Result 1156 states and 1900 transitions. [2021-08-21 18:22:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:22:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 18:22:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:18,688 INFO L225 Difference]: With dead ends: 1156 [2021-08-21 18:22:18,688 INFO L226 Difference]: Without dead ends: 1139 [2021-08-21 18:22:18,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-08-21 18:22:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 973. [2021-08-21 18:22:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.6923868312757202) internal successors, (1645), 972 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1645 transitions. [2021-08-21 18:22:18,705 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1645 transitions. Word has length 40 [2021-08-21 18:22:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:18,706 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1645 transitions. [2021-08-21 18:22:18,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1645 transitions. [2021-08-21 18:22:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:22:18,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:18,707 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:22:18,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1792256034, now seen corresponding path program 4 times [2021-08-21 18:22:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:18,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605511326] [2021-08-21 18:22:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:18,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:18,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605511326] [2021-08-21 18:22:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605511326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118734003] [2021-08-21 18:22:18,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:18,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:18,746 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 18:22:18,754 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 18:22:18,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:18,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:22:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:18,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118734003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:18,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:18,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-21 18:22:18,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178230160] [2021-08-21 18:22:18,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:22:18,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:22:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:18,942 INFO L87 Difference]: Start difference. First operand 973 states and 1645 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:18,956 INFO L93 Difference]: Finished difference Result 1900 states and 3066 transitions. [2021-08-21 18:22:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:22:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 18:22:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:18,961 INFO L225 Difference]: With dead ends: 1900 [2021-08-21 18:22:18,961 INFO L226 Difference]: Without dead ends: 1590 [2021-08-21 18:22:18,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-08-21 18:22:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1536. [2021-08-21 18:22:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.730944625407166) internal successors, (2657), 1535 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2657 transitions. [2021-08-21 18:22:18,988 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2657 transitions. Word has length 40 [2021-08-21 18:22:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:18,990 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2657 transitions. [2021-08-21 18:22:18,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2657 transitions. [2021-08-21 18:22:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:22:18,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:18,992 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:19,011 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 18:22:19,200 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 18:22:19,201 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -674871838, now seen corresponding path program 5 times [2021-08-21 18:22:19,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:19,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741322142] [2021-08-21 18:22:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:19,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:22:19,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:19,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741322142] [2021-08-21 18:22:19,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741322142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:19,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142910872] [2021-08-21 18:22:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:19,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:19,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:19,298 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 18:22:19,304 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 18:22:19,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:22:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:22:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:19,642 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 55 treesize of output 53 [2021-08-21 18:22:19,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:19,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2021-08-21 18:22:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:22:19,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142910872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:19,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:19,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 18:22:19,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759438632] [2021-08-21 18:22:19,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:22:19,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:19,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:22:19,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:22:19,817 INFO L87 Difference]: Start difference. First operand 1536 states and 2657 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 18:22:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:19,885 INFO L93 Difference]: Finished difference Result 2171 states and 3605 transitions. [2021-08-21 18:22:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:22:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 40 [2021-08-21 18:22:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:19,891 INFO L225 Difference]: With dead ends: 2171 [2021-08-21 18:22:19,891 INFO L226 Difference]: Without dead ends: 1793 [2021-08-21 18:22:19,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:22:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-08-21 18:22:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1508. [2021-08-21 18:22:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 1.7100199071001991) internal successors, (2577), 1507 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2577 transitions. [2021-08-21 18:22:19,925 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2577 transitions. Word has length 40 [2021-08-21 18:22:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:19,926 INFO L470 AbstractCegarLoop]: Abstraction has 1508 states and 2577 transitions. [2021-08-21 18:22:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 18:22:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2577 transitions. [2021-08-21 18:22:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:22:19,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:19,929 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:19,948 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 18:22:20,144 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 18:22:20,145 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -219452496, now seen corresponding path program 6 times [2021-08-21 18:22:20,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:20,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768537263] [2021-08-21 18:22:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:20,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-21 18:22:20,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:20,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768537263] [2021-08-21 18:22:20,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768537263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:20,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515595441] [2021-08-21 18:22:20,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:22:20,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:20,245 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 18:22:20,246 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 18:22:20,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:22:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:22:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 18:22:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515595441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-08-21 18:22:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891279830] [2021-08-21 18:22:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:22:20,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:22:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:22:20,764 INFO L87 Difference]: Start difference. First operand 1508 states and 2577 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:20,841 INFO L93 Difference]: Finished difference Result 3247 states and 5540 transitions. [2021-08-21 18:22:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:22:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:22:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:20,848 INFO L225 Difference]: With dead ends: 3247 [2021-08-21 18:22:20,848 INFO L226 Difference]: Without dead ends: 2337 [2021-08-21 18:22:20,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:22:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-08-21 18:22:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1487. [2021-08-21 18:22:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 1.7234185733512786) internal successors, (2561), 1486 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2561 transitions. [2021-08-21 18:22:20,872 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2561 transitions. Word has length 42 [2021-08-21 18:22:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:20,872 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 2561 transitions. [2021-08-21 18:22:20,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2561 transitions. [2021-08-21 18:22:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:22:20,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:20,875 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:20,904 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 18:22:21,104 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 18:22:21,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1344751282, now seen corresponding path program 7 times [2021-08-21 18:22:21,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:21,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671327980] [2021-08-21 18:22:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:21,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:22:21,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:21,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671327980] [2021-08-21 18:22:21,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671327980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:21,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761632419] [2021-08-21 18:22:21,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:22:21,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:21,269 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 18:22:21,270 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 18:22:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:22:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:21,935 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 62 treesize of output 60 [2021-08-21 18:22:21,940 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:22:21,940 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 60 treesize of output 50 [2021-08-21 18:22:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:22:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761632419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:22,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:22,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:22:22,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345335814] [2021-08-21 18:22:22,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:22:22,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:22,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:22:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:22:22,034 INFO L87 Difference]: Start difference. First operand 1487 states and 2561 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:22,333 INFO L93 Difference]: Finished difference Result 4705 states and 8081 transitions. [2021-08-21 18:22:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:22:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:22:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:22,345 INFO L225 Difference]: With dead ends: 4705 [2021-08-21 18:22:22,346 INFO L226 Difference]: Without dead ends: 3817 [2021-08-21 18:22:22,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:22:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-08-21 18:22:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2254. [2021-08-21 18:22:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 1.7336884154460719) internal successors, (3906), 2253 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 3906 transitions. [2021-08-21 18:22:22,391 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 3906 transitions. Word has length 42 [2021-08-21 18:22:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:22,392 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 3906 transitions. [2021-08-21 18:22:22,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 3906 transitions. [2021-08-21 18:22:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:22:22,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:22,395 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:22,414 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 18:22:22,608 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 18:22:22,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash 17935168, now seen corresponding path program 8 times [2021-08-21 18:22:22,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:22,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040949975] [2021-08-21 18:22:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:22,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:22,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:22,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040949975] [2021-08-21 18:22:22,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040949975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:22,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691994457] [2021-08-21 18:22:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:22,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:22,769 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 18:22:22,782 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 18:22:22,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:22,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:22:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:23,593 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 62 treesize of output 60 [2021-08-21 18:22:23,598 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:22:23,599 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 60 treesize of output 50 [2021-08-21 18:22:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:23,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691994457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:23,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:23,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:22:23,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196369656] [2021-08-21 18:22:23,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:22:23,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:22:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:22:23,729 INFO L87 Difference]: Start difference. First operand 2254 states and 3906 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:24,204 INFO L93 Difference]: Finished difference Result 4745 states and 7867 transitions. [2021-08-21 18:22:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:22:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:22:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:24,217 INFO L225 Difference]: With dead ends: 4745 [2021-08-21 18:22:24,218 INFO L226 Difference]: Without dead ends: 3676 [2021-08-21 18:22:24,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:22:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-08-21 18:22:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 2529. [2021-08-21 18:22:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 1.7088607594936709) internal successors, (4320), 2528 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4320 transitions. [2021-08-21 18:22:24,263 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4320 transitions. Word has length 42 [2021-08-21 18:22:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:24,263 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4320 transitions. [2021-08-21 18:22:24,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4320 transitions. [2021-08-21 18:22:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:22:24,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:24,267 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:24,288 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 18:22:24,480 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 18:22:24,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1067832128, now seen corresponding path program 9 times [2021-08-21 18:22:24,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:24,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216761741] [2021-08-21 18:22:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:24,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:24,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:24,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216761741] [2021-08-21 18:22:24,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216761741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:24,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591542771] [2021-08-21 18:22:24,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:24,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:24,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:24,749 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 18:22:24,749 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 18:22:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:22:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:22:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:25,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:25,517 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 95 treesize of output 89 [2021-08-21 18:22:25,714 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:25,714 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 18 treesize of output 10 [2021-08-21 18:22:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591542771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:25,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:25,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-08-21 18:22:25,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973382453] [2021-08-21 18:22:25,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:22:25,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:22:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:22:25,780 INFO L87 Difference]: Start difference. First operand 2529 states and 4320 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:29,762 INFO L93 Difference]: Finished difference Result 7168 states and 12066 transitions. [2021-08-21 18:22:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-21 18:22:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:22:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:29,781 INFO L225 Difference]: With dead ends: 7168 [2021-08-21 18:22:29,781 INFO L226 Difference]: Without dead ends: 6070 [2021-08-21 18:22:29,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4809 ImplicationChecksByTransitivity, 3406.6ms TimeCoverageRelationStatistics Valid=2501, Invalid=10155, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 18:22:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-08-21 18:22:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 3597. [2021-08-21 18:22:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 1.78587319243604) internal successors, (6422), 3596 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 6422 transitions. [2021-08-21 18:22:29,880 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 6422 transitions. Word has length 42 [2021-08-21 18:22:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 3597 states and 6422 transitions. [2021-08-21 18:22:29,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 6422 transitions. [2021-08-21 18:22:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:22:29,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:29,886 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:29,905 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 18:22:30,100 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 18:22:30,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 294170162, now seen corresponding path program 10 times [2021-08-21 18:22:30,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:30,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594628976] [2021-08-21 18:22:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:30,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:30,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:30,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594628976] [2021-08-21 18:22:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594628976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:30,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014207468] [2021-08-21 18:22:30,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:30,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:30,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:30,467 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 18:22:30,468 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 18:22:30,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:22:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:31,127 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:31,128 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 88 treesize of output 82 [2021-08-21 18:22:31,223 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:31,223 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 18 treesize of output 10 [2021-08-21 18:22:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:31,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014207468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:31,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:31,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-08-21 18:22:31,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846744204] [2021-08-21 18:22:31,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:22:31,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:22:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:22:31,304 INFO L87 Difference]: Start difference. First operand 3597 states and 6422 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:34,928 INFO L93 Difference]: Finished difference Result 9509 states and 15317 transitions. [2021-08-21 18:22:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-21 18:22:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:22:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:34,946 INFO L225 Difference]: With dead ends: 9509 [2021-08-21 18:22:34,946 INFO L226 Difference]: Without dead ends: 8638 [2021-08-21 18:22:34,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 2960.3ms TimeCoverageRelationStatistics Valid=2568, Invalid=11004, Unknown=0, NotChecked=0, Total=13572 [2021-08-21 18:22:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8638 states. [2021-08-21 18:22:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8638 to 4614. [2021-08-21 18:22:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4614 states, 4613 states have (on average 1.7600260134402774) internal successors, (8119), 4613 states have internal predecessors, (8119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 8119 transitions. [2021-08-21 18:22:35,047 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 8119 transitions. Word has length 42 [2021-08-21 18:22:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 4614 states and 8119 transitions. [2021-08-21 18:22:35,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 8119 transitions. [2021-08-21 18:22:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 18:22:35,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:35,054 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:35,071 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 18:22:35,268 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 18:22:35,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash -814591316, now seen corresponding path program 11 times [2021-08-21 18:22:35,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:35,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164492303] [2021-08-21 18:22:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:35,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 18:22:35,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:35,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164492303] [2021-08-21 18:22:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164492303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:35,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327869046] [2021-08-21 18:22:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:35,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:35,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:35,352 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 18:22:35,353 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 18:22:35,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:22:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:22:35,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:35,888 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:35,889 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 18 treesize of output 10 [2021-08-21 18:22:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 18:22:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327869046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:35,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:35,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:22:35,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478399229] [2021-08-21 18:22:35,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:22:35,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:22:35,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:22:35,955 INFO L87 Difference]: Start difference. First operand 4614 states and 8119 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:36,192 INFO L93 Difference]: Finished difference Result 8736 states and 15056 transitions. [2021-08-21 18:22:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:22:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 18:22:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:36,208 INFO L225 Difference]: With dead ends: 8736 [2021-08-21 18:22:36,208 INFO L226 Difference]: Without dead ends: 8736 [2021-08-21 18:22:36,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:22:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8736 states. [2021-08-21 18:22:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8736 to 6400. [2021-08-21 18:22:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6400 states, 6399 states have (on average 1.7463666197843413) internal successors, (11175), 6399 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6400 states to 6400 states and 11175 transitions. [2021-08-21 18:22:36,324 INFO L78 Accepts]: Start accepts. Automaton has 6400 states and 11175 transitions. Word has length 44 [2021-08-21 18:22:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:36,324 INFO L470 AbstractCegarLoop]: Abstraction has 6400 states and 11175 transitions. [2021-08-21 18:22:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6400 states and 11175 transitions. [2021-08-21 18:22:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 18:22:36,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:36,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:36,352 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 18:22:36,552 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 18:22:36,552 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1033337845, now seen corresponding path program 12 times [2021-08-21 18:22:36,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:36,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060966731] [2021-08-21 18:22:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:36,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:36,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:36,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060966731] [2021-08-21 18:22:36,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060966731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:36,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959212244] [2021-08-21 18:22:36,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:22:36,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:36,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:36,829 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 18:22:36,877 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 18:22:37,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:22:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:22:37,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 18:22:37,852 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:37,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 125 [2021-08-21 18:22:37,858 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:22:37,858 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 125 treesize of output 103 [2021-08-21 18:22:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:38,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959212244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:38,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:38,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-21 18:22:38,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871344249] [2021-08-21 18:22:38,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:22:38,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:22:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:22:38,482 INFO L87 Difference]: Start difference. First operand 6400 states and 11175 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 18:22:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:40,270 INFO L93 Difference]: Finished difference Result 11528 states and 19360 transitions. [2021-08-21 18:22:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:22:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 47 [2021-08-21 18:22:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:40,289 INFO L225 Difference]: With dead ends: 11528 [2021-08-21 18:22:40,289 INFO L226 Difference]: Without dead ends: 10714 [2021-08-21 18:22:40,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1724.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2610, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:22:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10714 states. [2021-08-21 18:22:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10714 to 6391. [2021-08-21 18:22:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 1.742097026604069) internal successors, (11132), 6390 states have internal predecessors, (11132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 11132 transitions. [2021-08-21 18:22:40,402 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 11132 transitions. Word has length 47 [2021-08-21 18:22:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:40,402 INFO L470 AbstractCegarLoop]: Abstraction has 6391 states and 11132 transitions. [2021-08-21 18:22:40,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 18:22:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 11132 transitions. [2021-08-21 18:22:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:22:40,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:40,412 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:40,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:40,628 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 18:22:40,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash -4991221, now seen corresponding path program 13 times [2021-08-21 18:22:40,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:40,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37645810] [2021-08-21 18:22:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:40,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:22:40,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:40,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37645810] [2021-08-21 18:22:40,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37645810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:40,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331407892] [2021-08-21 18:22:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:22:40,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:40,669 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 18:22:40,704 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 18:22:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:22:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:22:41,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:22:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:22:41,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331407892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:41,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:41,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-21 18:22:41,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918781769] [2021-08-21 18:22:41,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:41,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:41,323 INFO L87 Difference]: Start difference. First operand 6391 states and 11132 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:41,385 INFO L93 Difference]: Finished difference Result 11493 states and 19931 transitions. [2021-08-21 18:22:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:22:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 18:22:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:41,404 INFO L225 Difference]: With dead ends: 11493 [2021-08-21 18:22:41,404 INFO L226 Difference]: Without dead ends: 11456 [2021-08-21 18:22:41,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:22:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2021-08-21 18:22:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 9179. [2021-08-21 18:22:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 1.7820876007844846) internal successors, (16356), 9178 states have internal predecessors, (16356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 16356 transitions. [2021-08-21 18:22:41,543 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 16356 transitions. Word has length 49 [2021-08-21 18:22:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:41,544 INFO L470 AbstractCegarLoop]: Abstraction has 9179 states and 16356 transitions. [2021-08-21 18:22:41,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 16356 transitions. [2021-08-21 18:22:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:22:41,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:41,558 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:41,579 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 18:22:41,779 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 18:22:41,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1049808897, now seen corresponding path program 14 times [2021-08-21 18:22:41,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:41,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844680542] [2021-08-21 18:22:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:41,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:42,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844680542] [2021-08-21 18:22:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844680542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980589218] [2021-08-21 18:22:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:42,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:42,123 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 18:22:42,123 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 18:22:42,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:42,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:42,829 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 18 treesize of output 10 [2021-08-21 18:22:42,909 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 15 treesize of output 7 [2021-08-21 18:22:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:22:42,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980589218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:42,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:42,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-08-21 18:22:42,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734811702] [2021-08-21 18:22:42,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:22:42,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:22:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:22:42,986 INFO L87 Difference]: Start difference. First operand 9179 states and 16356 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 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 18:22:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:45,265 INFO L93 Difference]: Finished difference Result 17581 states and 30277 transitions. [2021-08-21 18:22:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 18:22:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:22:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:45,293 INFO L225 Difference]: With dead ends: 17581 [2021-08-21 18:22:45,293 INFO L226 Difference]: Without dead ends: 16358 [2021-08-21 18:22:45,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 1741.7ms TimeCoverageRelationStatistics Valid=831, Invalid=6651, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:22:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16358 states. [2021-08-21 18:22:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16358 to 11609. [2021-08-21 18:22:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11609 states, 11608 states have (on average 1.7651619572708477) internal successors, (20490), 11608 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11609 states to 11609 states and 20490 transitions. [2021-08-21 18:22:45,536 INFO L78 Accepts]: Start accepts. Automaton has 11609 states and 20490 transitions. Word has length 49 [2021-08-21 18:22:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:45,536 INFO L470 AbstractCegarLoop]: Abstraction has 11609 states and 20490 transitions. [2021-08-21 18:22:45,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 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 18:22:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 11609 states and 20490 transitions. [2021-08-21 18:22:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:22:45,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:45,553 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:45,573 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 18:22:45,773 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 18:22:45,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash -670478581, now seen corresponding path program 15 times [2021-08-21 18:22:45,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:45,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386181605] [2021-08-21 18:22:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:45,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:46,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:46,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386181605] [2021-08-21 18:22:46,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386181605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:46,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004450036] [2021-08-21 18:22:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:46,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:46,073 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 18:22:46,073 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 18:22:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:22:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:22:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:47,130 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:47,130 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 88 treesize of output 82 [2021-08-21 18:22:47,252 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:22:47,253 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 25 treesize of output 13 [2021-08-21 18:22:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:47,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004450036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:47,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:47,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-08-21 18:22:47,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899412976] [2021-08-21 18:22:47,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:22:47,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:22:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:22:47,333 INFO L87 Difference]: Start difference. First operand 11609 states and 20490 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:52,697 INFO L93 Difference]: Finished difference Result 34009 states and 58990 transitions. [2021-08-21 18:22:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-21 18:22:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:22:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:52,753 INFO L225 Difference]: With dead ends: 34009 [2021-08-21 18:22:52,753 INFO L226 Difference]: Without dead ends: 32122 [2021-08-21 18:22:52,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 4250.7ms TimeCoverageRelationStatistics Valid=2810, Invalid=18946, Unknown=0, NotChecked=0, Total=21756 [2021-08-21 18:22:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32122 states. [2021-08-21 18:22:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32122 to 14475. [2021-08-21 18:22:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14475 states, 14474 states have (on average 1.759499792731795) internal successors, (25467), 14474 states have internal predecessors, (25467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14475 states to 14475 states and 25467 transitions. [2021-08-21 18:22:53,118 INFO L78 Accepts]: Start accepts. Automaton has 14475 states and 25467 transitions. Word has length 49 [2021-08-21 18:22:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:53,118 INFO L470 AbstractCegarLoop]: Abstraction has 14475 states and 25467 transitions. [2021-08-21 18:22:53,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 14475 states and 25467 transitions. [2021-08-21 18:22:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:22:53,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:53,141 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:53,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:22:53,356 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 18:22:53,357 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1814159031, now seen corresponding path program 16 times [2021-08-21 18:22:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:53,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691364102] [2021-08-21 18:22:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:53,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:53,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:53,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691364102] [2021-08-21 18:22:53,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691364102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:53,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733297619] [2021-08-21 18:22:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:53,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:53,468 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 18:22:53,468 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 18:22:54,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:54,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:22:54,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:54,348 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:22:54,349 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 22 treesize of output 10 [2021-08-21 18:22:54,394 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 18:22:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733297619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:54,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:54,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-21 18:22:54,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305325147] [2021-08-21 18:22:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:22:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:22:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:22:54,549 INFO L87 Difference]: Start difference. First operand 14475 states and 25467 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:56,428 INFO L93 Difference]: Finished difference Result 34894 states and 59808 transitions. [2021-08-21 18:22:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-21 18:22:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:22:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:56,480 INFO L225 Difference]: With dead ends: 34894 [2021-08-21 18:22:56,480 INFO L226 Difference]: Without dead ends: 34779 [2021-08-21 18:22:56,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=1340, Invalid=6492, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 18:22:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34779 states. [2021-08-21 18:22:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34779 to 15509. [2021-08-21 18:22:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15509 states, 15508 states have (on average 1.7649600206345113) internal successors, (27371), 15508 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15509 states to 15509 states and 27371 transitions. [2021-08-21 18:22:56,771 INFO L78 Accepts]: Start accepts. Automaton has 15509 states and 27371 transitions. Word has length 49 [2021-08-21 18:22:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:56,771 INFO L470 AbstractCegarLoop]: Abstraction has 15509 states and 27371 transitions. [2021-08-21 18:22:56,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15509 states and 27371 transitions. [2021-08-21 18:22:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:22:56,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:56,792 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:56,812 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 18:22:57,008 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 18:22:57,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1519091631, now seen corresponding path program 17 times [2021-08-21 18:22:57,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:57,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416888913] [2021-08-21 18:22:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:57,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:57,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:57,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416888913] [2021-08-21 18:22:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416888913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:57,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351084551] [2021-08-21 18:22:57,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:57,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:57,377 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 18:22:57,381 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 18:22:58,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:22:58,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:58,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:58,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:22:58,821 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 133 treesize of output 127 [2021-08-21 18:22:59,420 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:22:59,420 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 68 treesize of output 47 [2021-08-21 18:22:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:22:59,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351084551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:59,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:59,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2021-08-21 18:22:59,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544500303] [2021-08-21 18:22:59,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:22:59,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:22:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:22:59,531 INFO L87 Difference]: Start difference. First operand 15509 states and 27371 transitions. Second operand has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:07,478 INFO L93 Difference]: Finished difference Result 25212 states and 42856 transitions. [2021-08-21 18:23:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-08-21 18:23:07,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:23:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:07,507 INFO L225 Difference]: With dead ends: 25212 [2021-08-21 18:23:07,507 INFO L226 Difference]: Without dead ends: 23275 [2021-08-21 18:23:07,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9412 ImplicationChecksByTransitivity, 6717.9ms TimeCoverageRelationStatistics Valid=3134, Invalid=22306, Unknown=0, NotChecked=0, Total=25440 [2021-08-21 18:23:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23275 states. [2021-08-21 18:23:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23275 to 16065. [2021-08-21 18:23:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16065 states, 16064 states have (on average 1.7638819721115537) internal successors, (28335), 16064 states have internal predecessors, (28335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16065 states to 16065 states and 28335 transitions. [2021-08-21 18:23:07,722 INFO L78 Accepts]: Start accepts. Automaton has 16065 states and 28335 transitions. Word has length 49 [2021-08-21 18:23:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:07,723 INFO L470 AbstractCegarLoop]: Abstraction has 16065 states and 28335 transitions. [2021-08-21 18:23:07,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 16065 states and 28335 transitions. [2021-08-21 18:23:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:23:07,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:07,745 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:07,765 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 18:23:07,960 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 18:23:07,961 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1304395975, now seen corresponding path program 18 times [2021-08-21 18:23:07,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:07,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588014634] [2021-08-21 18:23:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:07,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:08,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:08,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588014634] [2021-08-21 18:23:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588014634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:08,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761546516] [2021-08-21 18:23:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:23:08,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:08,264 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 18:23:08,264 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 18:23:08,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:23:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:23:08,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:09,311 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:09,312 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 18 treesize of output 10 [2021-08-21 18:23:09,363 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 18:23:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:09,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761546516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:09,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:09,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-08-21 18:23:09,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756244945] [2021-08-21 18:23:09,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:23:09,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:23:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:23:09,434 INFO L87 Difference]: Start difference. First operand 16065 states and 28335 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:11,517 INFO L93 Difference]: Finished difference Result 28466 states and 48704 transitions. [2021-08-21 18:23:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:23:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:23:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:11,560 INFO L225 Difference]: With dead ends: 28466 [2021-08-21 18:23:11,560 INFO L226 Difference]: Without dead ends: 26025 [2021-08-21 18:23:11,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1622.1ms TimeCoverageRelationStatistics Valid=959, Invalid=4893, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:23:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26025 states. [2021-08-21 18:23:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26025 to 13003. [2021-08-21 18:23:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13003 states, 13002 states have (on average 1.7318104906937395) internal successors, (22517), 13002 states have internal predecessors, (22517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13003 states to 13003 states and 22517 transitions. [2021-08-21 18:23:11,768 INFO L78 Accepts]: Start accepts. Automaton has 13003 states and 22517 transitions. Word has length 49 [2021-08-21 18:23:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:11,769 INFO L470 AbstractCegarLoop]: Abstraction has 13003 states and 22517 transitions. [2021-08-21 18:23:11,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 13003 states and 22517 transitions. [2021-08-21 18:23:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:23:11,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:11,786 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:11,805 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 18:23:11,993 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 18:23:11,993 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -141342533, now seen corresponding path program 19 times [2021-08-21 18:23:11,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:11,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547872492] [2021-08-21 18:23:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:11,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:12,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547872492] [2021-08-21 18:23:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547872492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191351044] [2021-08-21 18:23:12,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:23:12,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:12,116 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 18:23:12,117 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 18:23:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:23:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:13,140 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:23:13,140 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 22 treesize of output 10 [2021-08-21 18:23:13,182 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 18:23:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191351044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:13,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:13,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 18:23:13,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665822164] [2021-08-21 18:23:13,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:23:13,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:23:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:23:13,227 INFO L87 Difference]: Start difference. First operand 13003 states and 22517 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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 18:23:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:13,713 INFO L93 Difference]: Finished difference Result 20051 states and 34437 transitions. [2021-08-21 18:23:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:23:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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 49 [2021-08-21 18:23:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:13,741 INFO L225 Difference]: With dead ends: 20051 [2021-08-21 18:23:13,741 INFO L226 Difference]: Without dead ends: 19917 [2021-08-21 18:23:13,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:23:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19917 states. [2021-08-21 18:23:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19917 to 13823. [2021-08-21 18:23:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13823 states, 13822 states have (on average 1.732672551005643) internal successors, (23949), 13822 states have internal predecessors, (23949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13823 states to 13823 states and 23949 transitions. [2021-08-21 18:23:13,933 INFO L78 Accepts]: Start accepts. Automaton has 13823 states and 23949 transitions. Word has length 49 [2021-08-21 18:23:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:13,933 INFO L470 AbstractCegarLoop]: Abstraction has 13823 states and 23949 transitions. [2021-08-21 18:23:13,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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 18:23:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 13823 states and 23949 transitions. [2021-08-21 18:23:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:23:13,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:13,956 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:13,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:14,172 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 18:23:14,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2011014799, now seen corresponding path program 20 times [2021-08-21 18:23:14,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:14,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297461050] [2021-08-21 18:23:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:14,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:14,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:14,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297461050] [2021-08-21 18:23:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297461050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:14,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488434568] [2021-08-21 18:23:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:23:14,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:14,588 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 18:23:14,589 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 18:23:15,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:23:15,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:23:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:16,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 100 [2021-08-21 18:23:16,161 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:16,161 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 18 treesize of output 10 [2021-08-21 18:23:16,216 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 18:23:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:23:16,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488434568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:16,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:16,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 32 [2021-08-21 18:23:16,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489710852] [2021-08-21 18:23:16,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:23:16,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:23:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:23:16,291 INFO L87 Difference]: Start difference. First operand 13823 states and 23949 transitions. Second operand has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:23,513 INFO L93 Difference]: Finished difference Result 37410 states and 62754 transitions. [2021-08-21 18:23:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-08-21 18:23:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:23:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:23,573 INFO L225 Difference]: With dead ends: 37410 [2021-08-21 18:23:23,573 INFO L226 Difference]: Without dead ends: 37225 [2021-08-21 18:23:23,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10241 ImplicationChecksByTransitivity, 5863.7ms TimeCoverageRelationStatistics Valid=3320, Invalid=25410, Unknown=0, NotChecked=0, Total=28730 [2021-08-21 18:23:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37225 states. [2021-08-21 18:23:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37225 to 13835. [2021-08-21 18:23:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13835 states, 13834 states have (on average 1.7334104380511783) internal successors, (23980), 13834 states have internal predecessors, (23980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13835 states to 13835 states and 23980 transitions. [2021-08-21 18:23:23,945 INFO L78 Accepts]: Start accepts. Automaton has 13835 states and 23980 transitions. Word has length 49 [2021-08-21 18:23:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:23,946 INFO L470 AbstractCegarLoop]: Abstraction has 13835 states and 23980 transitions. [2021-08-21 18:23:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13835 states and 23980 transitions. [2021-08-21 18:23:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 18:23:23,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:23,963 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:23,983 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 18:23:24,163 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 18:23:24,164 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash -610782377, now seen corresponding path program 21 times [2021-08-21 18:23:24,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:24,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021877866] [2021-08-21 18:23:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:24,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:23:24,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:24,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021877866] [2021-08-21 18:23:24,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021877866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:24,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398444668] [2021-08-21 18:23:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:23:24,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:24,397 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 18:23:24,428 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 18:23:25,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:23:25,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:23:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 18:23:26,598 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:23:26,598 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 171 treesize of output 133 [2021-08-21 18:23:26,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:26,603 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 133 treesize of output 115 [2021-08-21 18:23:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:23:26,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398444668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:26,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:26,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-08-21 18:23:26,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625051033] [2021-08-21 18:23:26,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:23:26,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:23:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:23:26,819 INFO L87 Difference]: Start difference. First operand 13835 states and 23980 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:29,628 INFO L93 Difference]: Finished difference Result 21795 states and 37279 transitions. [2021-08-21 18:23:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 18:23:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 18:23:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:29,657 INFO L225 Difference]: With dead ends: 21795 [2021-08-21 18:23:29,657 INFO L226 Difference]: Without dead ends: 20366 [2021-08-21 18:23:29,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2262.7ms TimeCoverageRelationStatistics Valid=660, Invalid=5346, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:23:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20366 states. [2021-08-21 18:23:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20366 to 13522. [2021-08-21 18:23:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13522 states, 13521 states have (on average 1.7256859699726352) internal successors, (23333), 13521 states have internal predecessors, (23333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 23333 transitions. [2021-08-21 18:23:29,855 INFO L78 Accepts]: Start accepts. Automaton has 13522 states and 23333 transitions. Word has length 51 [2021-08-21 18:23:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:29,855 INFO L470 AbstractCegarLoop]: Abstraction has 13522 states and 23333 transitions. [2021-08-21 18:23:29,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13522 states and 23333 transitions. [2021-08-21 18:23:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 18:23:29,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:29,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:29,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 18:23:30,073 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 18:23:30,074 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1997330675, now seen corresponding path program 22 times [2021-08-21 18:23:30,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:30,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82140658] [2021-08-21 18:23:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:30,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:23:30,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:30,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82140658] [2021-08-21 18:23:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82140658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:30,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39995271] [2021-08-21 18:23:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:23:30,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:30,260 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 18:23:30,265 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 18:23:31,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:23:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:23:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:31,399 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:31,400 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 18 treesize of output 10 [2021-08-21 18:23:31,466 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 18:23:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:23:31,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39995271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:31,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:31,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 18:23:31,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84017204] [2021-08-21 18:23:31,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:23:31,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:23:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:23:31,541 INFO L87 Difference]: Start difference. First operand 13522 states and 23333 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:32,739 INFO L93 Difference]: Finished difference Result 25229 states and 42462 transitions. [2021-08-21 18:23:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:23:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 18:23:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:32,775 INFO L225 Difference]: With dead ends: 25229 [2021-08-21 18:23:32,775 INFO L226 Difference]: Without dead ends: 25229 [2021-08-21 18:23:32,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=773, Invalid=3517, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:23:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25229 states. [2021-08-21 18:23:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25229 to 14215. [2021-08-21 18:23:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14215 states, 14214 states have (on average 1.7218939074152244) internal successors, (24475), 14214 states have internal predecessors, (24475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14215 states to 14215 states and 24475 transitions. [2021-08-21 18:23:32,993 INFO L78 Accepts]: Start accepts. Automaton has 14215 states and 24475 transitions. Word has length 51 [2021-08-21 18:23:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:32,993 INFO L470 AbstractCegarLoop]: Abstraction has 14215 states and 24475 transitions. [2021-08-21 18:23:32,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 14215 states and 24475 transitions. [2021-08-21 18:23:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 18:23:33,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:33,011 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:33,030 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 18:23:33,216 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 18:23:33,217 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1232377829, now seen corresponding path program 23 times [2021-08-21 18:23:33,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:33,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463237142] [2021-08-21 18:23:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:33,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 18:23:33,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:33,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463237142] [2021-08-21 18:23:33,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463237142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:33,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427187424] [2021-08-21 18:23:33,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:23:33,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:33,298 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 18:23:33,299 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 18:23:34,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:23:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:23:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:34,539 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:34,539 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 18 treesize of output 10 [2021-08-21 18:23:34,632 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 18:23:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 18:23:34,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427187424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:34,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:34,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-21 18:23:34,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271258106] [2021-08-21 18:23:34,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:23:34,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:34,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:23:34,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:23:34,712 INFO L87 Difference]: Start difference. First operand 14215 states and 24475 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:36,458 INFO L93 Difference]: Finished difference Result 29146 states and 49605 transitions. [2021-08-21 18:23:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:23:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 18:23:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:36,501 INFO L225 Difference]: With dead ends: 29146 [2021-08-21 18:23:36,501 INFO L226 Difference]: Without dead ends: 29146 [2021-08-21 18:23:36,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1071.6ms TimeCoverageRelationStatistics Valid=859, Invalid=4111, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:23:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29146 states. [2021-08-21 18:23:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29146 to 15527. [2021-08-21 18:23:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15527 states, 15526 states have (on average 1.7111941259822234) internal successors, (26568), 15526 states have internal predecessors, (26568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15527 states to 15527 states and 26568 transitions. [2021-08-21 18:23:36,739 INFO L78 Accepts]: Start accepts. Automaton has 15527 states and 26568 transitions. Word has length 53 [2021-08-21 18:23:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 15527 states and 26568 transitions. [2021-08-21 18:23:36,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 15527 states and 26568 transitions. [2021-08-21 18:23:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:23:36,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:36,758 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:36,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:23:36,958 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 18:23:36,958 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:36,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1929456085, now seen corresponding path program 24 times [2021-08-21 18:23:36,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:36,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797359806] [2021-08-21 18:23:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:36,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:23:37,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:37,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797359806] [2021-08-21 18:23:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797359806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:37,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092179153] [2021-08-21 18:23:37,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:23:37,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:37,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:37,309 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 18:23:37,310 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 18:23:38,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:23:38,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:23:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:38,828 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:23:38,828 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 78 treesize of output 72 [2021-08-21 18:23:38,946 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:23:38,946 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 25 treesize of output 13 [2021-08-21 18:23:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:39,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092179153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:39,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:39,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-08-21 18:23:39,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449823689] [2021-08-21 18:23:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:23:39,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:23:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:23:39,016 INFO L87 Difference]: Start difference. First operand 15527 states and 26568 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:44,905 INFO L93 Difference]: Finished difference Result 25831 states and 43590 transitions. [2021-08-21 18:23:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-21 18:23:44,906 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 18:23:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:44,939 INFO L225 Difference]: With dead ends: 25831 [2021-08-21 18:23:44,939 INFO L226 Difference]: Without dead ends: 24419 [2021-08-21 18:23:44,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 4646.6ms TimeCoverageRelationStatistics Valid=2163, Invalid=12117, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 18:23:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24419 states. [2021-08-21 18:23:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24419 to 17119. [2021-08-21 18:23:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17119 states, 17118 states have (on average 1.722397476340694) internal successors, (29484), 17118 states have internal predecessors, (29484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17119 states to 17119 states and 29484 transitions. [2021-08-21 18:23:45,178 INFO L78 Accepts]: Start accepts. Automaton has 17119 states and 29484 transitions. Word has length 54 [2021-08-21 18:23:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:45,178 INFO L470 AbstractCegarLoop]: Abstraction has 17119 states and 29484 transitions. [2021-08-21 18:23:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 17119 states and 29484 transitions. [2021-08-21 18:23:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:23:45,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:45,200 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:45,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:45,401 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 18:23:45,401 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:45,401 INFO L82 PathProgramCache]: Analyzing trace with hash -169356073, now seen corresponding path program 25 times [2021-08-21 18:23:45,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:45,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831304551] [2021-08-21 18:23:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:45,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:23:45,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:45,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831304551] [2021-08-21 18:23:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831304551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:45,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955582023] [2021-08-21 18:23:45,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:23:45,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:45,774 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 18:23:45,774 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 18:23:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:46,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:23:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:47,173 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 21 treesize of output 13 [2021-08-21 18:23:48,063 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:23:48,063 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 139 treesize of output 113 [2021-08-21 18:23:48,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:23:48,070 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 110 treesize of output 106 [2021-08-21 18:23:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:23:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955582023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:48,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:48,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-08-21 18:23:48,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390232121] [2021-08-21 18:23:48,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:23:48,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:23:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:23:48,354 INFO L87 Difference]: Start difference. First operand 17119 states and 29484 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:50,582 INFO L93 Difference]: Finished difference Result 38854 states and 68460 transitions. [2021-08-21 18:23:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:23:50,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 18:23:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:50,638 INFO L225 Difference]: With dead ends: 38854 [2021-08-21 18:23:50,638 INFO L226 Difference]: Without dead ends: 35431 [2021-08-21 18:23:50,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2010.8ms TimeCoverageRelationStatistics Valid=889, Invalid=3143, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:23:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35431 states. [2021-08-21 18:23:50,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35431 to 19707. [2021-08-21 18:23:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19707 states, 19706 states have (on average 1.7679894448391353) internal successors, (34840), 19706 states have internal predecessors, (34840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19707 states to 19707 states and 34840 transitions. [2021-08-21 18:23:50,982 INFO L78 Accepts]: Start accepts. Automaton has 19707 states and 34840 transitions. Word has length 54 [2021-08-21 18:23:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 19707 states and 34840 transitions. [2021-08-21 18:23:50,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 19707 states and 34840 transitions. [2021-08-21 18:23:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:23:51,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:51,006 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:51,025 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 18:23:51,207 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 18:23:51,207 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1532113067, now seen corresponding path program 26 times [2021-08-21 18:23:51,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:51,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101766096] [2021-08-21 18:23:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:51,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:23:51,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:51,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101766096] [2021-08-21 18:23:51,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101766096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:51,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062901125] [2021-08-21 18:23:51,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:23:51,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:51,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:51,691 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 18:23:51,691 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 18:23:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:23:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:23:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:53,193 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 21 treesize of output 13 [2021-08-21 18:23:54,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:23:54,436 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 150 treesize of output 142 [2021-08-21 18:23:54,441 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:23:54,441 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 142 treesize of output 116 [2021-08-21 18:23:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:23:54,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062901125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:54,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:54,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-21 18:23:54,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474638417] [2021-08-21 18:23:54,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:23:54,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:23:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:23:54,748 INFO L87 Difference]: Start difference. First operand 19707 states and 34840 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:57,221 INFO L93 Difference]: Finished difference Result 24768 states and 42991 transitions. [2021-08-21 18:23:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:23:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 18:23:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:57,254 INFO L225 Difference]: With dead ends: 24768 [2021-08-21 18:23:57,254 INFO L226 Difference]: Without dead ends: 23101 [2021-08-21 18:23:57,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2349.7ms TimeCoverageRelationStatistics Valid=616, Invalid=2806, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:23:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23101 states. [2021-08-21 18:23:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23101 to 19825. [2021-08-21 18:23:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 1.7680084745762712) internal successors, (35049), 19824 states have internal predecessors, (35049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 35049 transitions. [2021-08-21 18:23:57,511 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 35049 transitions. Word has length 54 [2021-08-21 18:23:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 19825 states and 35049 transitions. [2021-08-21 18:23:57,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 35049 transitions. [2021-08-21 18:23:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:23:57,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:57,535 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:57,554 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 18:23:57,735 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 18:23:57,735 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1018942515, now seen corresponding path program 27 times [2021-08-21 18:23:57,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:57,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076586385] [2021-08-21 18:23:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:57,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:23:58,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:58,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076586385] [2021-08-21 18:23:58,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076586385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:58,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290665110] [2021-08-21 18:23:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:23:58,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:58,264 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 18:23:58,267 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 18:23:59,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:23:59,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:23:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 18:24:00,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:00,728 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 129 treesize of output 117 [2021-08-21 18:24:00,736 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:24:00,737 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 117 treesize of output 91 [2021-08-21 18:24:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:24:00,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290665110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:00,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:00,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-08-21 18:24:00,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713396798] [2021-08-21 18:24:00,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:24:00,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:24:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:24:00,983 INFO L87 Difference]: Start difference. First operand 19825 states and 35049 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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 18:24:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:02,071 INFO L93 Difference]: Finished difference Result 23750 states and 41410 transitions. [2021-08-21 18:24:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:24:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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 54 [2021-08-21 18:24:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:02,107 INFO L225 Difference]: With dead ends: 23750 [2021-08-21 18:24:02,107 INFO L226 Difference]: Without dead ends: 23046 [2021-08-21 18:24:02,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1060.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:24:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23046 states. [2021-08-21 18:24:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23046 to 19729. [2021-08-21 18:24:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19729 states, 19728 states have (on average 1.767234387672344) internal successors, (34864), 19728 states have internal predecessors, (34864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19729 states to 19729 states and 34864 transitions. [2021-08-21 18:24:02,379 INFO L78 Accepts]: Start accepts. Automaton has 19729 states and 34864 transitions. Word has length 54 [2021-08-21 18:24:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 19729 states and 34864 transitions. [2021-08-21 18:24:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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 18:24:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19729 states and 34864 transitions. [2021-08-21 18:24:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:02,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:02,402 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:02,422 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 18:24:02,603 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 18:24:02,603 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash -171818567, now seen corresponding path program 28 times [2021-08-21 18:24:02,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:02,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611117220] [2021-08-21 18:24:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:02,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:24:02,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:02,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611117220] [2021-08-21 18:24:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611117220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:02,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033177027] [2021-08-21 18:24:02,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:24:02,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:02,983 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 18:24:02,984 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 18:24:04,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:24:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:24:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:05,059 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:05,060 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 88 treesize of output 82 [2021-08-21 18:24:05,197 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:24:05,198 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 25 treesize of output 13 [2021-08-21 18:24:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:05,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033177027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:05,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:05,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-08-21 18:24:05,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758953462] [2021-08-21 18:24:05,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:24:05,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:24:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:24:05,268 INFO L87 Difference]: Start difference. First operand 19729 states and 34864 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:15,707 INFO L93 Difference]: Finished difference Result 50474 states and 88484 transitions. [2021-08-21 18:24:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-08-21 18:24:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:24:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:15,786 INFO L225 Difference]: With dead ends: 50474 [2021-08-21 18:24:15,787 INFO L226 Difference]: Without dead ends: 47806 [2021-08-21 18:24:15,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15741 ImplicationChecksByTransitivity, 9022.7ms TimeCoverageRelationStatistics Valid=4746, Invalid=35054, Unknown=0, NotChecked=0, Total=39800 [2021-08-21 18:24:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47806 states. [2021-08-21 18:24:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47806 to 21577. [2021-08-21 18:24:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 1.7768817204301075) internal successors, (38338), 21576 states have internal predecessors, (38338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 38338 transitions. [2021-08-21 18:24:16,212 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 38338 transitions. Word has length 56 [2021-08-21 18:24:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:16,212 INFO L470 AbstractCegarLoop]: Abstraction has 21577 states and 38338 transitions. [2021-08-21 18:24:16,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 38338 transitions. [2021-08-21 18:24:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:16,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:16,239 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:16,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:16,440 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 18:24:16,441 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1636072499, now seen corresponding path program 29 times [2021-08-21 18:24:16,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:16,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196788784] [2021-08-21 18:24:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:16,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:17,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:17,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196788784] [2021-08-21 18:24:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196788784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:17,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283778111] [2021-08-21 18:24:17,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:24:17,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:17,084 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 18:24:17,086 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 18:24:18,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:24:18,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:24:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:19,156 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:24:19,156 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 29 treesize of output 13 [2021-08-21 18:24:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:24:19,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283778111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:19,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:19,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 26 [2021-08-21 18:24:19,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297215790] [2021-08-21 18:24:19,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:24:19,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:24:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:24:19,235 INFO L87 Difference]: Start difference. First operand 21577 states and 38338 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:25,787 INFO L93 Difference]: Finished difference Result 36149 states and 62960 transitions. [2021-08-21 18:24:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-21 18:24:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:24:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:25,844 INFO L225 Difference]: With dead ends: 36149 [2021-08-21 18:24:25,844 INFO L226 Difference]: Without dead ends: 35182 [2021-08-21 18:24:25,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10465 ImplicationChecksByTransitivity, 5766.9ms TimeCoverageRelationStatistics Valid=4850, Invalid=20910, Unknown=0, NotChecked=0, Total=25760 [2021-08-21 18:24:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35182 states. [2021-08-21 18:24:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35182 to 22854. [2021-08-21 18:24:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22854 states, 22853 states have (on average 1.7737714960836652) internal successors, (40536), 22853 states have internal predecessors, (40536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22854 states to 22854 states and 40536 transitions. [2021-08-21 18:24:26,198 INFO L78 Accepts]: Start accepts. Automaton has 22854 states and 40536 transitions. Word has length 56 [2021-08-21 18:24:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:26,198 INFO L470 AbstractCegarLoop]: Abstraction has 22854 states and 40536 transitions. [2021-08-21 18:24:26,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 22854 states and 40536 transitions. [2021-08-21 18:24:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:26,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:26,227 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:26,249 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 18:24:26,428 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 18:24:26,429 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 298188365, now seen corresponding path program 30 times [2021-08-21 18:24:26,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:26,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26034456] [2021-08-21 18:24:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:26,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:26,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:26,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26034456] [2021-08-21 18:24:26,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26034456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:26,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94434510] [2021-08-21 18:24:26,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:24:26,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:26,911 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 18:24:26,911 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 18:24:28,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:24:28,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:24:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:29,012 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:29,013 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 75 treesize of output 69 [2021-08-21 18:24:29,180 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-21 18:24:29,181 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 53 treesize of output 38 [2021-08-21 18:24:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:29,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94434510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:29,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:29,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 27 [2021-08-21 18:24:29,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696316630] [2021-08-21 18:24:29,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:24:29,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:24:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:24:29,260 INFO L87 Difference]: Start difference. First operand 22854 states and 40536 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:38,948 INFO L93 Difference]: Finished difference Result 45059 states and 78067 transitions. [2021-08-21 18:24:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-08-21 18:24:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:24:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:39,027 INFO L225 Difference]: With dead ends: 45059 [2021-08-21 18:24:39,027 INFO L226 Difference]: Without dead ends: 43606 [2021-08-21 18:24:39,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15400 ImplicationChecksByTransitivity, 8277.7ms TimeCoverageRelationStatistics Valid=5771, Invalid=32841, Unknown=0, NotChecked=0, Total=38612 [2021-08-21 18:24:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43606 states. [2021-08-21 18:24:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43606 to 25984. [2021-08-21 18:24:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25984 states, 25983 states have (on average 1.772274179271062) internal successors, (46049), 25983 states have internal predecessors, (46049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25984 states to 25984 states and 46049 transitions. [2021-08-21 18:24:39,530 INFO L78 Accepts]: Start accepts. Automaton has 25984 states and 46049 transitions. Word has length 56 [2021-08-21 18:24:39,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:39,531 INFO L470 AbstractCegarLoop]: Abstraction has 25984 states and 46049 transitions. [2021-08-21 18:24:39,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25984 states and 46049 transitions. [2021-08-21 18:24:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:39,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:39,568 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:39,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 18:24:39,769 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 18:24:39,769 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1348085325, now seen corresponding path program 31 times [2021-08-21 18:24:39,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:39,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454813780] [2021-08-21 18:24:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:39,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:39,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:39,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454813780] [2021-08-21 18:24:39,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454813780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:39,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825984727] [2021-08-21 18:24:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:24:39,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:39,891 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 18:24:39,908 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 18:24:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:24:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:42,344 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:42,344 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 115 treesize of output 105 [2021-08-21 18:24:42,557 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:24:42,557 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 25 treesize of output 13 [2021-08-21 18:24:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825984727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:42,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 18:24:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889558744] [2021-08-21 18:24:42,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:24:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:24:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:24:42,607 INFO L87 Difference]: Start difference. First operand 25984 states and 46049 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:43,598 INFO L93 Difference]: Finished difference Result 66328 states and 116603 transitions. [2021-08-21 18:24:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:24:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:24:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:43,717 INFO L225 Difference]: With dead ends: 66328 [2021-08-21 18:24:43,718 INFO L226 Difference]: Without dead ends: 66328 [2021-08-21 18:24:43,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 690.4ms TimeCoverageRelationStatistics Valid=432, Invalid=1824, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:24:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66328 states. [2021-08-21 18:24:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66328 to 30029. [2021-08-21 18:24:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30029 states, 30028 states have (on average 1.7741108298921007) internal successors, (53273), 30028 states have internal predecessors, (53273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30029 states to 30029 states and 53273 transitions. [2021-08-21 18:24:44,393 INFO L78 Accepts]: Start accepts. Automaton has 30029 states and 53273 transitions. Word has length 56 [2021-08-21 18:24:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:44,394 INFO L470 AbstractCegarLoop]: Abstraction has 30029 states and 53273 transitions. [2021-08-21 18:24:44,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30029 states and 53273 transitions. [2021-08-21 18:24:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:44,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:44,435 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:44,456 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 18:24:44,636 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 18:24:44,636 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2116551525, now seen corresponding path program 32 times [2021-08-21 18:24:44,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:44,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022002481] [2021-08-21 18:24:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:44,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:45,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022002481] [2021-08-21 18:24:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022002481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20787024] [2021-08-21 18:24:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:24:45,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:45,238 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 18:24:45,238 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 18:24:47,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:24:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:24:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:47,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:47,529 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 92 treesize of output 86 [2021-08-21 18:24:47,736 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:24:47,736 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 25 treesize of output 13 [2021-08-21 18:24:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:47,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20787024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:47,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:47,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2021-08-21 18:24:47,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199989450] [2021-08-21 18:24:47,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:24:47,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:24:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:24:47,805 INFO L87 Difference]: Start difference. First operand 30029 states and 53273 transitions. Second operand has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:53,096 INFO L93 Difference]: Finished difference Result 64803 states and 113590 transitions. [2021-08-21 18:24:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-21 18:24:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:24:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:53,216 INFO L225 Difference]: With dead ends: 64803 [2021-08-21 18:24:53,216 INFO L226 Difference]: Without dead ends: 64803 [2021-08-21 18:24:53,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6455 ImplicationChecksByTransitivity, 4388.5ms TimeCoverageRelationStatistics Valid=3428, Invalid=14128, Unknown=0, NotChecked=0, Total=17556 [2021-08-21 18:24:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64803 states. [2021-08-21 18:24:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64803 to 29763. [2021-08-21 18:24:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29763 states, 29762 states have (on average 1.7742759223170486) internal successors, (52806), 29762 states have internal predecessors, (52806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29763 states to 29763 states and 52806 transitions. [2021-08-21 18:24:53,829 INFO L78 Accepts]: Start accepts. Automaton has 29763 states and 52806 transitions. Word has length 56 [2021-08-21 18:24:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 29763 states and 52806 transitions. [2021-08-21 18:24:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29763 states and 52806 transitions. [2021-08-21 18:24:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:24:53,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:53,870 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:53,891 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 18:24:54,070 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 18:24:54,070 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:24:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash -461187870, now seen corresponding path program 33 times [2021-08-21 18:24:54,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:54,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056649880] [2021-08-21 18:24:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:54,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:24:54,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:54,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056649880] [2021-08-21 18:24:54,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056649880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:54,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220983544] [2021-08-21 18:24:54,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:24:54,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:54,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:54,293 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 18:24:54,293 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 18:24:56,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:24:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:24:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:57,125 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:57,125 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 147 treesize of output 141 [2021-08-21 18:24:57,674 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:24:57,675 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 38 treesize of output 25 [2021-08-21 18:24:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:57,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220983544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:57,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:57,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 18:24:57,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7439140] [2021-08-21 18:24:57,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:24:57,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:24:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:24:57,729 INFO L87 Difference]: Start difference. First operand 29763 states and 52806 transitions. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:00,360 INFO L93 Difference]: Finished difference Result 62487 states and 108921 transitions. [2021-08-21 18:25:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:25:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:25:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:00,478 INFO L225 Difference]: With dead ends: 62487 [2021-08-21 18:25:00,478 INFO L226 Difference]: Without dead ends: 62487 [2021-08-21 18:25:00,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 1771.2ms TimeCoverageRelationStatistics Valid=1057, Invalid=5749, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:25:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62487 states. [2021-08-21 18:25:01,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62487 to 30868. [2021-08-21 18:25:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30868 states, 30867 states have (on average 1.7861794149091264) internal successors, (55134), 30867 states have internal predecessors, (55134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 55134 transitions. [2021-08-21 18:25:01,312 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 55134 transitions. Word has length 56 [2021-08-21 18:25:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:01,312 INFO L470 AbstractCegarLoop]: Abstraction has 30868 states and 55134 transitions. [2021-08-21 18:25:01,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 55134 transitions. [2021-08-21 18:25:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:25:01,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:01,355 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:01,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:25:01,555 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 18:25:01,556 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1111704452, now seen corresponding path program 34 times [2021-08-21 18:25:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837799235] [2021-08-21 18:25:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:01,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:25:02,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:02,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837799235] [2021-08-21 18:25:02,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837799235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:02,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031749040] [2021-08-21 18:25:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:25:02,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:02,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:02,156 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 18:25:02,163 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 18:25:03,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:25:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:25:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:04,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:04,232 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 18 treesize of output 10 [2021-08-21 18:25:04,382 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 18:25:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:25:04,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031749040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:04,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:04,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2021-08-21 18:25:04,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373756007] [2021-08-21 18:25:04,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:04,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:04,455 INFO L87 Difference]: Start difference. First operand 30868 states and 55134 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:07,164 INFO L93 Difference]: Finished difference Result 60308 states and 103640 transitions. [2021-08-21 18:25:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 18:25:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:25:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:07,264 INFO L225 Difference]: With dead ends: 60308 [2021-08-21 18:25:07,264 INFO L226 Difference]: Without dead ends: 55910 [2021-08-21 18:25:07,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2750 ImplicationChecksByTransitivity, 2249.8ms TimeCoverageRelationStatistics Valid=1426, Invalid=7694, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 18:25:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55910 states. [2021-08-21 18:25:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55910 to 31324. [2021-08-21 18:25:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31324 states, 31323 states have (on average 1.7740957124157968) internal successors, (55570), 31323 states have internal predecessors, (55570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31324 states to 31324 states and 55570 transitions. [2021-08-21 18:25:07,836 INFO L78 Accepts]: Start accepts. Automaton has 31324 states and 55570 transitions. Word has length 56 [2021-08-21 18:25:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:07,836 INFO L470 AbstractCegarLoop]: Abstraction has 31324 states and 55570 transitions. [2021-08-21 18:25:07,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31324 states and 55570 transitions. [2021-08-21 18:25:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:25:07,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:07,878 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:07,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:08,085 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 18:25:08,085 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:08,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1996786359, now seen corresponding path program 35 times [2021-08-21 18:25:08,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:08,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966946056] [2021-08-21 18:25:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:08,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:25:08,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:08,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966946056] [2021-08-21 18:25:08,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966946056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:08,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604300123] [2021-08-21 18:25:08,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:25:08,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:08,245 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 18:25:08,264 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 18:25:10,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:25:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:25:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:11,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:11,419 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 162 treesize of output 152 [2021-08-21 18:25:12,323 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 18:25:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 66 [2021-08-21 18:25:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604300123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:12,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-21 18:25:12,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14321322] [2021-08-21 18:25:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:25:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:25:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:25:12,391 INFO L87 Difference]: Start difference. First operand 31324 states and 55570 transitions. Second operand has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:15,553 INFO L93 Difference]: Finished difference Result 53483 states and 93464 transitions. [2021-08-21 18:25:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:25:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:25:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:15,655 INFO L225 Difference]: With dead ends: 53483 [2021-08-21 18:25:15,655 INFO L226 Difference]: Without dead ends: 53483 [2021-08-21 18:25:15,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2625.2ms TimeCoverageRelationStatistics Valid=848, Invalid=3982, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:25:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53483 states. [2021-08-21 18:25:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53483 to 36835. [2021-08-21 18:25:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36835 states, 36834 states have (on average 1.7801216267578868) internal successors, (65569), 36834 states have internal predecessors, (65569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36835 states to 36835 states and 65569 transitions. [2021-08-21 18:25:16,264 INFO L78 Accepts]: Start accepts. Automaton has 36835 states and 65569 transitions. Word has length 56 [2021-08-21 18:25:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:16,264 INFO L470 AbstractCegarLoop]: Abstraction has 36835 states and 65569 transitions. [2021-08-21 18:25:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.5) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36835 states and 65569 transitions. [2021-08-21 18:25:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:25:16,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:16,319 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:16,343 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 18:25:16,519 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 18:25:16,519 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1930210199, now seen corresponding path program 36 times [2021-08-21 18:25:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:16,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378409465] [2021-08-21 18:25:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:16,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:25:17,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:17,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378409465] [2021-08-21 18:25:17,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378409465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:17,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133589544] [2021-08-21 18:25:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:25:17,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:17,465 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 18:25:17,466 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 18:25:19,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:25:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:25:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:19,903 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 21 treesize of output 13 [2021-08-21 18:25:21,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:21,245 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 158 treesize of output 146 [2021-08-21 18:25:21,250 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:25:21,250 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 146 treesize of output 112 [2021-08-21 18:25:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:25:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133589544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:21,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 18:25:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007874560] [2021-08-21 18:25:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:25:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:25:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:25:21,577 INFO L87 Difference]: Start difference. First operand 36835 states and 65569 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:24,329 INFO L93 Difference]: Finished difference Result 50307 states and 88045 transitions. [2021-08-21 18:25:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:25:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:25:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:24,460 INFO L225 Difference]: With dead ends: 50307 [2021-08-21 18:25:24,461 INFO L226 Difference]: Without dead ends: 47052 [2021-08-21 18:25:24,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2445.8ms TimeCoverageRelationStatistics Valid=526, Invalid=2666, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:25:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47052 states. [2021-08-21 18:25:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47052 to 36476. [2021-08-21 18:25:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36476 states, 36475 states have (on average 1.7751610692254969) internal successors, (64749), 36475 states have internal predecessors, (64749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36476 states to 36476 states and 64749 transitions. [2021-08-21 18:25:24,966 INFO L78 Accepts]: Start accepts. Automaton has 36476 states and 64749 transitions. Word has length 56 [2021-08-21 18:25:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:24,966 INFO L470 AbstractCegarLoop]: Abstraction has 36476 states and 64749 transitions. [2021-08-21 18:25:24,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 36476 states and 64749 transitions. [2021-08-21 18:25:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:25:25,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:25,019 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:25,042 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 18:25:25,219 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 18:25:25,220 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash 266481609, now seen corresponding path program 37 times [2021-08-21 18:25:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:25,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140425689] [2021-08-21 18:25:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:25,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:25,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140425689] [2021-08-21 18:25:25,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140425689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164345547] [2021-08-21 18:25:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:25:25,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:25,606 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 18:25:25,607 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 18:25:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:25:27,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:29,337 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:29,337 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 43 treesize of output 31 [2021-08-21 18:25:29,940 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:25:29,941 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 237 treesize of output 203 [2021-08-21 18:25:30,388 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:25:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-08-21 18:25:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164345547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:30,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 33 [2021-08-21 18:25:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977429829] [2021-08-21 18:25:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:25:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:25:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:25:30,492 INFO L87 Difference]: Start difference. First operand 36476 states and 64749 transitions. Second operand has 34 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:33,415 INFO L93 Difference]: Finished difference Result 60971 states and 105364 transitions. [2021-08-21 18:25:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:25:33,416 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 18:25:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:33,524 INFO L225 Difference]: With dead ends: 60971 [2021-08-21 18:25:33,524 INFO L226 Difference]: Without dead ends: 60971 [2021-08-21 18:25:33,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2768.5ms TimeCoverageRelationStatistics Valid=926, Invalid=4926, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:25:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60971 states. [2021-08-21 18:25:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60971 to 37289. [2021-08-21 18:25:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37289 states, 37288 states have (on average 1.7851319459343489) internal successors, (66564), 37288 states have internal predecessors, (66564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37289 states to 37289 states and 66564 transitions. [2021-08-21 18:25:34,252 INFO L78 Accepts]: Start accepts. Automaton has 37289 states and 66564 transitions. Word has length 56 [2021-08-21 18:25:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:34,252 INFO L470 AbstractCegarLoop]: Abstraction has 37289 states and 66564 transitions. [2021-08-21 18:25:34,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 37289 states and 66564 transitions. [2021-08-21 18:25:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:25:34,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:34,302 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:34,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 18:25:34,502 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 18:25:34,503 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 409912903, now seen corresponding path program 38 times [2021-08-21 18:25:34,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:34,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321507095] [2021-08-21 18:25:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:34,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:25:34,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:34,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321507095] [2021-08-21 18:25:34,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321507095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:34,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437210856] [2021-08-21 18:25:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:25:34,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:34,613 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 18:25:34,613 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 18:25:37,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:25:37,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:25:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:37,643 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:37,643 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 130 treesize of output 124 [2021-08-21 18:25:38,127 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-21 18:25:38,127 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 37 treesize of output 26 [2021-08-21 18:25:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:25:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437210856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:38,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:38,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 18:25:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129768092] [2021-08-21 18:25:38,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:25:38,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:25:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:25:38,177 INFO L87 Difference]: Start difference. First operand 37289 states and 66564 transitions. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:38,707 INFO L93 Difference]: Finished difference Result 46164 states and 81375 transitions. [2021-08-21 18:25:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:25:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:25:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:38,779 INFO L225 Difference]: With dead ends: 46164 [2021-08-21 18:25:38,779 INFO L226 Difference]: Without dead ends: 46164 [2021-08-21 18:25:38,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:25:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46164 states. [2021-08-21 18:25:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46164 to 37217. [2021-08-21 18:25:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37217 states, 37216 states have (on average 1.7847699914015478) internal successors, (66422), 37216 states have internal predecessors, (66422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37217 states to 37217 states and 66422 transitions. [2021-08-21 18:25:39,327 INFO L78 Accepts]: Start accepts. Automaton has 37217 states and 66422 transitions. Word has length 58 [2021-08-21 18:25:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:39,328 INFO L470 AbstractCegarLoop]: Abstraction has 37217 states and 66422 transitions. [2021-08-21 18:25:39,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 37217 states and 66422 transitions. [2021-08-21 18:25:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:25:39,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:39,379 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:39,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:39,579 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 18:25:39,580 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1777865305, now seen corresponding path program 39 times [2021-08-21 18:25:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:39,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996351500] [2021-08-21 18:25:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:39,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:25:39,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:39,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996351500] [2021-08-21 18:25:39,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996351500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:39,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928066764] [2021-08-21 18:25:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:25:39,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:39,726 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 18:25:39,740 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 18:25:42,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:25:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:25:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:43,333 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:25:43,334 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 47 treesize of output 31 [2021-08-21 18:25:44,422 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:25:44,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 191 [2021-08-21 18:25:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928066764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:45,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:45,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 32 [2021-08-21 18:25:45,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997106749] [2021-08-21 18:25:45,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:25:45,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:25:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:25:45,130 INFO L87 Difference]: Start difference. First operand 37217 states and 66422 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:48,603 INFO L93 Difference]: Finished difference Result 55160 states and 95794 transitions. [2021-08-21 18:25:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:25:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:25:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:48,696 INFO L225 Difference]: With dead ends: 55160 [2021-08-21 18:25:48,697 INFO L226 Difference]: Without dead ends: 52316 [2021-08-21 18:25:48,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 2684.8ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:25:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52316 states. [2021-08-21 18:25:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52316 to 37961. [2021-08-21 18:25:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37961 states, 37960 states have (on average 1.7892518440463645) internal successors, (67920), 37960 states have internal predecessors, (67920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37961 states to 37961 states and 67920 transitions. [2021-08-21 18:25:49,293 INFO L78 Accepts]: Start accepts. Automaton has 37961 states and 67920 transitions. Word has length 58 [2021-08-21 18:25:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:49,293 INFO L470 AbstractCegarLoop]: Abstraction has 37961 states and 67920 transitions. [2021-08-21 18:25:49,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 37961 states and 67920 transitions. [2021-08-21 18:25:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 18:25:49,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:49,518 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:49,543 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 18:25:49,731 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 18:25:49,731 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 42426820, now seen corresponding path program 40 times [2021-08-21 18:25:49,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:49,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417460858] [2021-08-21 18:25:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:49,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:25:50,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:50,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417460858] [2021-08-21 18:25:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417460858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:50,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637829073] [2021-08-21 18:25:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:25:50,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:50,215 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 18:25:50,216 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 18:25:52,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:25:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:25:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:53,148 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 21 treesize of output 13 [2021-08-21 18:25:53,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:53,826 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 148 treesize of output 144 [2021-08-21 18:25:53,830 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:25:53,830 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 144 treesize of output 114 [2021-08-21 18:25:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:25:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637829073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:54,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:54,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-08-21 18:25:54,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387064604] [2021-08-21 18:25:54,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:54,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:54,125 INFO L87 Difference]: Start difference. First operand 37961 states and 67920 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:55,699 INFO L93 Difference]: Finished difference Result 43370 states and 76346 transitions. [2021-08-21 18:25:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:25:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 18:25:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:55,764 INFO L225 Difference]: With dead ends: 43370 [2021-08-21 18:25:55,765 INFO L226 Difference]: Without dead ends: 41594 [2021-08-21 18:25:55,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1504.2ms TimeCoverageRelationStatistics Valid=428, Invalid=2328, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:25:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41594 states. [2021-08-21 18:25:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41594 to 38108. [2021-08-21 18:25:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38108 states, 38107 states have (on average 1.7882278846406172) internal successors, (68144), 38107 states have internal predecessors, (68144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38108 states to 38108 states and 68144 transitions. [2021-08-21 18:25:56,290 INFO L78 Accepts]: Start accepts. Automaton has 38108 states and 68144 transitions. Word has length 59 [2021-08-21 18:25:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:56,290 INFO L470 AbstractCegarLoop]: Abstraction has 38108 states and 68144 transitions. [2021-08-21 18:25:56,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38108 states and 68144 transitions. [2021-08-21 18:25:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 18:25:56,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:56,340 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:56,365 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 18:25:56,556 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 18:25:56,557 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:25:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash -682258831, now seen corresponding path program 41 times [2021-08-21 18:25:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:56,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035158138] [2021-08-21 18:25:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:56,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:25:57,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:57,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035158138] [2021-08-21 18:25:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035158138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:57,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760332293] [2021-08-21 18:25:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:25:57,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:57,235 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 18:25:57,236 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 18:25:59,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:25:59,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:25:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:01,448 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:01,448 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 144 treesize of output 138 [2021-08-21 18:26:01,826 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:26:01,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 46 treesize of output 22 [2021-08-21 18:26:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:01,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760332293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:01,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:01,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-21 18:26:01,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747336115] [2021-08-21 18:26:01,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:26:01,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:26:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:26:01,910 INFO L87 Difference]: Start difference. First operand 38108 states and 68144 transitions. Second operand has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:04,591 INFO L93 Difference]: Finished difference Result 83890 states and 143178 transitions. [2021-08-21 18:26:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:26:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 18:26:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:04,751 INFO L225 Difference]: With dead ends: 83890 [2021-08-21 18:26:04,751 INFO L226 Difference]: Without dead ends: 83678 [2021-08-21 18:26:04,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 2227.2ms TimeCoverageRelationStatistics Valid=1045, Invalid=5435, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:26:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83678 states. [2021-08-21 18:26:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83678 to 42684. [2021-08-21 18:26:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42684 states, 42683 states have (on average 1.8211465923201275) internal successors, (77732), 42683 states have internal predecessors, (77732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42684 states to 42684 states and 77732 transitions. [2021-08-21 18:26:05,750 INFO L78 Accepts]: Start accepts. Automaton has 42684 states and 77732 transitions. Word has length 60 [2021-08-21 18:26:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:05,751 INFO L470 AbstractCegarLoop]: Abstraction has 42684 states and 77732 transitions. [2021-08-21 18:26:05,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 42684 states and 77732 transitions. [2021-08-21 18:26:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 18:26:05,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:05,808 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:05,832 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 18:26:06,008 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 18:26:06,009 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:26:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash 185812165, now seen corresponding path program 42 times [2021-08-21 18:26:06,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:06,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478475048] [2021-08-21 18:26:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:06,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:26:06,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:06,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478475048] [2021-08-21 18:26:06,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478475048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:06,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404893748] [2021-08-21 18:26:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:26:06,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:06,127 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 18:26:06,152 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 18:26:09,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:26:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:26:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:09,506 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 21 treesize of output 13 [2021-08-21 18:26:11,486 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:11,486 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 165 treesize of output 153 [2021-08-21 18:26:11,862 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:26:11,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 27 [2021-08-21 18:26:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:11,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404893748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:11,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:11,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2021-08-21 18:26:11,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090732052] [2021-08-21 18:26:11,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:26:11,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:26:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:26:11,972 INFO L87 Difference]: Start difference. First operand 42684 states and 77732 transitions. Second operand has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:14,101 INFO L93 Difference]: Finished difference Result 65506 states and 116716 transitions. [2021-08-21 18:26:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:26:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 18:26:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:14,234 INFO L225 Difference]: With dead ends: 65506 [2021-08-21 18:26:14,234 INFO L226 Difference]: Without dead ends: 65506 [2021-08-21 18:26:14,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1643.9ms TimeCoverageRelationStatistics Valid=631, Invalid=3659, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:26:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65506 states. [2021-08-21 18:26:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65506 to 42932. [2021-08-21 18:26:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42932 states, 42931 states have (on average 1.8208753581328179) internal successors, (78172), 42931 states have internal predecessors, (78172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42932 states to 42932 states and 78172 transitions. [2021-08-21 18:26:15,036 INFO L78 Accepts]: Start accepts. Automaton has 42932 states and 78172 transitions. Word has length 60 [2021-08-21 18:26:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 42932 states and 78172 transitions. [2021-08-21 18:26:15,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42932 states and 78172 transitions. [2021-08-21 18:26:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:26:15,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:15,092 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:15,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 18:26:15,293 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 18:26:15,293 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:26:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1143278854, now seen corresponding path program 43 times [2021-08-21 18:26:15,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:15,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356030412] [2021-08-21 18:26:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:15,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-21 18:26:15,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:15,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356030412] [2021-08-21 18:26:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356030412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:15,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946105433] [2021-08-21 18:26:15,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:26:15,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:15,341 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 18:26:15,377 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 18:26:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:26:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-21 18:26:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946105433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:18,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:26:18,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367686409] [2021-08-21 18:26:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:26:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:26:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:26:18,708 INFO L87 Difference]: Start difference. First operand 42932 states and 78172 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:18,948 INFO L93 Difference]: Finished difference Result 74052 states and 130814 transitions. [2021-08-21 18:26:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:26:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:26:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:19,113 INFO L225 Difference]: With dead ends: 74052 [2021-08-21 18:26:19,114 INFO L226 Difference]: Without dead ends: 70628 [2021-08-21 18:26:19,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:26:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70628 states. [2021-08-21 18:26:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70628 to 60413. [2021-08-21 18:26:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60413 states, 60412 states have (on average 1.8040455538634708) internal successors, (108986), 60412 states have internal predecessors, (108986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60413 states to 60413 states and 108986 transitions. [2021-08-21 18:26:20,087 INFO L78 Accepts]: Start accepts. Automaton has 60413 states and 108986 transitions. Word has length 61 [2021-08-21 18:26:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:20,087 INFO L470 AbstractCegarLoop]: Abstraction has 60413 states and 108986 transitions. [2021-08-21 18:26:20,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 60413 states and 108986 transitions. [2021-08-21 18:26:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:26:20,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:20,401 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:20,426 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 18:26:20,615 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 18:26:20,615 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:26:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1053849098, now seen corresponding path program 44 times [2021-08-21 18:26:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:20,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886444264] [2021-08-21 18:26:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:20,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:26:21,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:21,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886444264] [2021-08-21 18:26:21,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886444264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:21,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564068970] [2021-08-21 18:26:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:26:21,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:21,313 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 18:26:21,322 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 18:26:24,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:26:24,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:24,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:26:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:25,020 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:26:25,021 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 29 treesize of output 13 [2021-08-21 18:26:25,083 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 18:26:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:26:25,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564068970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:25,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:25,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 32 [2021-08-21 18:26:25,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229496958] [2021-08-21 18:26:25,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:26:25,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:26:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:26:25,161 INFO L87 Difference]: Start difference. First operand 60413 states and 108986 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:31,151 INFO L93 Difference]: Finished difference Result 94401 states and 165574 transitions. [2021-08-21 18:26:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-21 18:26:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:26:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:31,315 INFO L225 Difference]: With dead ends: 94401 [2021-08-21 18:26:31,316 INFO L226 Difference]: Without dead ends: 88457 [2021-08-21 18:26:31,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 5038.7ms TimeCoverageRelationStatistics Valid=3164, Invalid=23242, Unknown=0, NotChecked=0, Total=26406 [2021-08-21 18:26:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88457 states. [2021-08-21 18:26:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88457 to 62508. [2021-08-21 18:26:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62508 states, 62507 states have (on average 1.801782200393556) internal successors, (112624), 62507 states have internal predecessors, (112624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62508 states to 62508 states and 112624 transitions. [2021-08-21 18:26:32,469 INFO L78 Accepts]: Start accepts. Automaton has 62508 states and 112624 transitions. Word has length 61 [2021-08-21 18:26:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 62508 states and 112624 transitions. [2021-08-21 18:26:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 62508 states and 112624 transitions. [2021-08-21 18:26:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:26:32,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:32,569 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:32,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:32,769 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 18:26:32,769 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:26:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:32,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1399753610, now seen corresponding path program 45 times [2021-08-21 18:26:32,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:32,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133254475] [2021-08-21 18:26:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:32,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133254475] [2021-08-21 18:26:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133254475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313142920] [2021-08-21 18:26:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:26:33,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:33,260 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 18:26:33,261 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 18:26:36,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:26:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:26:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:38,012 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:38,013 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 172 treesize of output 162 [2021-08-21 18:26:38,019 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:26:38,019 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 162 treesize of output 118 [2021-08-21 18:26:38,139 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 15 treesize of output 7 [2021-08-21 18:26:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:26:38,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313142920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:38,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:38,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 18:26:38,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002320968] [2021-08-21 18:26:38,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:26:38,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:26:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:26:38,219 INFO L87 Difference]: Start difference. First operand 62508 states and 112624 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 38 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:51,202 INFO L93 Difference]: Finished difference Result 152587 states and 271692 transitions. [2021-08-21 18:26:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-08-21 18:26:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 38 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:26:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:51,533 INFO L225 Difference]: With dead ends: 152587 [2021-08-21 18:26:51,533 INFO L226 Difference]: Without dead ends: 152168 [2021-08-21 18:26:51,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33349 ImplicationChecksByTransitivity, 11121.6ms TimeCoverageRelationStatistics Valid=8584, Invalid=68422, Unknown=0, NotChecked=0, Total=77006 [2021-08-21 18:26:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152168 states. [2021-08-21 18:26:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152168 to 68453. [2021-08-21 18:26:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68453 states, 68452 states have (on average 1.8015397650908667) internal successors, (123319), 68452 states have internal predecessors, (123319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68453 states to 68453 states and 123319 transitions. [2021-08-21 18:26:53,601 INFO L78 Accepts]: Start accepts. Automaton has 68453 states and 123319 transitions. Word has length 61 [2021-08-21 18:26:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:53,601 INFO L470 AbstractCegarLoop]: Abstraction has 68453 states and 123319 transitions. [2021-08-21 18:26:53,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 38 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 68453 states and 123319 transitions. [2021-08-21 18:26:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:26:53,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:53,697 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:53,723 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 18:26:53,898 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 18:26:53,898 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:26:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1122407938, now seen corresponding path program 46 times [2021-08-21 18:26:53,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:53,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522370499] [2021-08-21 18:26:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:53,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:54,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:54,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522370499] [2021-08-21 18:26:54,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522370499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:54,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736105099] [2021-08-21 18:26:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:26:54,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:54,563 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 18:26:54,564 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 18:26:57,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:26:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:57,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:58,500 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 21 treesize of output 13 [2021-08-21 18:26:59,652 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:26:59,653 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 155 treesize of output 121 [2021-08-21 18:26:59,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:26:59,659 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 118 treesize of output 114 [2021-08-21 18:27:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:00,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736105099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:00,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:00,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-21 18:27:00,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108347690] [2021-08-21 18:27:00,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:27:00,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:27:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:27:00,023 INFO L87 Difference]: Start difference. First operand 68453 states and 123319 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:02,561 INFO L93 Difference]: Finished difference Result 85445 states and 150992 transitions. [2021-08-21 18:27:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:27:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:27:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:02,718 INFO L225 Difference]: With dead ends: 85445 [2021-08-21 18:27:02,719 INFO L226 Difference]: Without dead ends: 79711 [2021-08-21 18:27:02,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 2203.0ms TimeCoverageRelationStatistics Valid=742, Invalid=4958, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:27:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79711 states. [2021-08-21 18:27:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79711 to 68996. [2021-08-21 18:27:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68996 states, 68995 states have (on average 1.8005507645481558) internal successors, (124229), 68995 states have internal predecessors, (124229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68996 states to 68996 states and 124229 transitions. [2021-08-21 18:27:03,823 INFO L78 Accepts]: Start accepts. Automaton has 68996 states and 124229 transitions. Word has length 61 [2021-08-21 18:27:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 68996 states and 124229 transitions. [2021-08-21 18:27:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68996 states and 124229 transitions. [2021-08-21 18:27:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:27:03,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:03,928 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:03,953 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 18:27:04,128 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 18:27:04,128 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:27:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1395876746, now seen corresponding path program 47 times [2021-08-21 18:27:04,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:04,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294118989] [2021-08-21 18:27:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:04,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:05,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:05,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294118989] [2021-08-21 18:27:05,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294118989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:05,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888621266] [2021-08-21 18:27:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:27:05,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:05,004 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 18:27:05,006 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 18:27:08,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:27:08,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:27:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:09,329 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:09,329 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 102 treesize of output 96 [2021-08-21 18:27:09,560 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:27:09,561 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 25 treesize of output 13 [2021-08-21 18:27:09,623 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 18:27:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:27:09,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888621266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:09,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:09,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 38 [2021-08-21 18:27:09,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409779532] [2021-08-21 18:27:09,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:27:09,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:27:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:27:09,665 INFO L87 Difference]: Start difference. First operand 68996 states and 124229 transitions. Second operand has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:21,915 INFO L93 Difference]: Finished difference Result 105625 states and 187780 transitions. [2021-08-21 18:27:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-08-21 18:27:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:27:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:22,150 INFO L225 Difference]: With dead ends: 105625 [2021-08-21 18:27:22,150 INFO L226 Difference]: Without dead ends: 105523 [2021-08-21 18:27:22,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22938 ImplicationChecksByTransitivity, 9831.4ms TimeCoverageRelationStatistics Valid=4399, Invalid=53441, Unknown=0, NotChecked=0, Total=57840 [2021-08-21 18:27:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105523 states. [2021-08-21 18:27:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105523 to 69152. [2021-08-21 18:27:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69152 states, 69151 states have (on average 1.79893277031424) internal successors, (124398), 69151 states have internal predecessors, (124398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69152 states to 69152 states and 124398 transitions. [2021-08-21 18:27:23,387 INFO L78 Accepts]: Start accepts. Automaton has 69152 states and 124398 transitions. Word has length 61 [2021-08-21 18:27:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 69152 states and 124398 transitions. [2021-08-21 18:27:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 69152 states and 124398 transitions. [2021-08-21 18:27:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:27:23,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:23,811 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:23,839 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 18:27:24,020 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 18:27:24,021 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:27:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -299290694, now seen corresponding path program 48 times [2021-08-21 18:27:24,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:24,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447299666] [2021-08-21 18:27:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:24,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:24,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:24,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447299666] [2021-08-21 18:27:24,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447299666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:24,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636278278] [2021-08-21 18:27:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:27:24,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:24,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:24,828 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 18:27:24,829 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 18:27:28,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:27:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:27:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:29,275 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:29,275 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 167 treesize of output 157 [2021-08-21 18:27:29,835 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:27:29,836 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 43 treesize of output 34 [2021-08-21 18:27:29,964 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 18:27:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636278278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:29,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:29,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 38 [2021-08-21 18:27:29,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416599575] [2021-08-21 18:27:29,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:27:29,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:27:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:27:29,997 INFO L87 Difference]: Start difference. First operand 69152 states and 124398 transitions. Second operand has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:58,119 INFO L93 Difference]: Finished difference Result 117072 states and 208491 transitions. [2021-08-21 18:27:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 439 states. [2021-08-21 18:27:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:27:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:58,411 INFO L225 Difference]: With dead ends: 117072 [2021-08-21 18:27:58,411 INFO L226 Difference]: Without dead ends: 116666 [2021-08-21 18:27:58,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94843 ImplicationChecksByTransitivity, 24807.0ms TimeCoverageRelationStatistics Valid=13014, Invalid=197208, Unknown=0, NotChecked=0, Total=210222 [2021-08-21 18:27:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116666 states. [2021-08-21 18:27:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116666 to 73446. [2021-08-21 18:27:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73446 states, 73445 states have (on average 1.8124038396078699) internal successors, (133112), 73445 states have internal predecessors, (133112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73446 states to 73446 states and 133112 transitions. [2021-08-21 18:27:59,881 INFO L78 Accepts]: Start accepts. Automaton has 73446 states and 133112 transitions. Word has length 61 [2021-08-21 18:27:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:59,881 INFO L470 AbstractCegarLoop]: Abstraction has 73446 states and 133112 transitions. [2021-08-21 18:27:59,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 73446 states and 133112 transitions. [2021-08-21 18:27:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:27:59,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:59,988 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:28:00,014 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 18:28:00,188 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 18:28:00,188 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:28:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:28:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1153890344, now seen corresponding path program 49 times [2021-08-21 18:28:00,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:28:00,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613746053] [2021-08-21 18:28:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:28:00,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:28:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:28:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:28:00,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:28:00,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613746053] [2021-08-21 18:28:00,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613746053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:00,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280601278] [2021-08-21 18:28:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:28:00,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:28:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:28:00,753 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 18:28:00,768 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 18:28:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:28:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:28:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:28:05,969 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:28:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-08-21 18:28:06,592 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-21 18:28:06,592 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 184 treesize of output 176 [2021-08-21 18:28:06,615 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 18:28:06,615 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 170 treesize of output 164 [2021-08-21 18:28:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:28:07,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280601278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:07,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:28:07,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 39 [2021-08-21 18:28:07,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622769969] [2021-08-21 18:28:07,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:28:07,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:28:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:28:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:28:07,127 INFO L87 Difference]: Start difference. First operand 73446 states and 133112 transitions. Second operand has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:28:18,177 INFO L93 Difference]: Finished difference Result 130408 states and 233619 transitions. [2021-08-21 18:28:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-08-21 18:28:18,177 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:28:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:28:18,459 INFO L225 Difference]: With dead ends: 130408 [2021-08-21 18:28:18,460 INFO L226 Difference]: Without dead ends: 128528 [2021-08-21 18:28:18,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20231 ImplicationChecksByTransitivity, 9026.5ms TimeCoverageRelationStatistics Valid=4981, Invalid=44525, Unknown=0, NotChecked=0, Total=49506 [2021-08-21 18:28:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128528 states. [2021-08-21 18:28:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128528 to 73799. [2021-08-21 18:28:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73799 states, 73798 states have (on average 1.813951597604271) internal successors, (133866), 73798 states have internal predecessors, (133866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73799 states to 73799 states and 133866 transitions. [2021-08-21 18:28:20,293 INFO L78 Accepts]: Start accepts. Automaton has 73799 states and 133866 transitions. Word has length 61 [2021-08-21 18:28:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:28:20,294 INFO L470 AbstractCegarLoop]: Abstraction has 73799 states and 133866 transitions. [2021-08-21 18:28:20,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 73799 states and 133866 transitions. [2021-08-21 18:28:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:28:20,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:28:20,410 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:28:20,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:28:20,610 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 18:28:20,610 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:28:20,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:28:20,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1831850618, now seen corresponding path program 50 times [2021-08-21 18:28:20,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:28:20,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90778001] [2021-08-21 18:28:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:28:20,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:28:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:28:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:28:21,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:28:21,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90778001] [2021-08-21 18:28:21,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90778001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:21,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036600531] [2021-08-21 18:28:21,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:28:21,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:28:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:28:21,785 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 18:28:21,790 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 18:28:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:28:25,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:28:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:28:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:28:27,141 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 18:28:27,141 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 150 treesize of output 152 [2021-08-21 18:28:27,871 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:28:27,871 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 102 treesize of output 72 [2021-08-21 18:28:28,101 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:28:28,102 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 24 treesize of output 12 [2021-08-21 18:28:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:28:28,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036600531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:28,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:28:28,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2021-08-21 18:28:28,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461818801] [2021-08-21 18:28:28,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 18:28:28,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:28:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 18:28:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:28:28,399 INFO L87 Difference]: Start difference. First operand 73799 states and 133866 transitions. Second operand has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:28:38,519 INFO L93 Difference]: Finished difference Result 107834 states and 195047 transitions. [2021-08-21 18:28:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-08-21 18:28:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:28:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:28:38,753 INFO L225 Difference]: With dead ends: 107834 [2021-08-21 18:28:38,753 INFO L226 Difference]: Without dead ends: 107829 [2021-08-21 18:28:38,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16171 ImplicationChecksByTransitivity, 8890.1ms TimeCoverageRelationStatistics Valid=4703, Invalid=36709, Unknown=0, NotChecked=0, Total=41412 [2021-08-21 18:28:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107829 states. [2021-08-21 18:28:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107829 to 74180. [2021-08-21 18:28:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74180 states, 74179 states have (on average 1.814731932218013) internal successors, (134615), 74179 states have internal predecessors, (134615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74180 states to 74180 states and 134615 transitions. [2021-08-21 18:28:40,210 INFO L78 Accepts]: Start accepts. Automaton has 74180 states and 134615 transitions. Word has length 61 [2021-08-21 18:28:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:28:40,210 INFO L470 AbstractCegarLoop]: Abstraction has 74180 states and 134615 transitions. [2021-08-21 18:28:40,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:28:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 74180 states and 134615 transitions. [2021-08-21 18:28:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:28:40,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:28:40,321 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:28:40,349 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 18:28:40,521 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 18:28:40,521 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:28:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:28:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1981011680, now seen corresponding path program 51 times [2021-08-21 18:28:40,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:28:40,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79221804] [2021-08-21 18:28:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:28:40,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:28:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:28:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:28:42,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:28:42,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79221804] [2021-08-21 18:28:42,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79221804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:42,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418418648] [2021-08-21 18:28:42,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:28:42,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:28:42,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:28:42,058 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 18:28:42,059 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 18:28:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:28:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:28:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:28:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:28:46,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:28:46,778 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 105 treesize of output 95 [2021-08-21 18:28:46,985 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:28:46,985 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 25 treesize of output 13 [2021-08-21 18:28:47,149 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:28:47,149 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 19 treesize of output 18 [2021-08-21 18:28:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:28:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418418648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:28:47,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:28:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18] total 45 [2021-08-21 18:28:47,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752697450] [2021-08-21 18:28:47,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:28:47,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:28:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:28:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:28:47,231 INFO L87 Difference]: Start difference. First operand 74180 states and 134615 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:29:14,258 INFO L93 Difference]: Finished difference Result 128710 states and 229811 transitions. [2021-08-21 18:29:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2021-08-21 18:29:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:29:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:29:14,526 INFO L225 Difference]: With dead ends: 128710 [2021-08-21 18:29:14,526 INFO L226 Difference]: Without dead ends: 128553 [2021-08-21 18:29:14,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70898 ImplicationChecksByTransitivity, 23274.0ms TimeCoverageRelationStatistics Valid=13072, Invalid=152984, Unknown=0, NotChecked=0, Total=166056 [2021-08-21 18:29:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128553 states. [2021-08-21 18:29:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128553 to 76546. [2021-08-21 18:29:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76546 states, 76545 states have (on average 1.8201580769482004) internal successors, (139324), 76545 states have internal predecessors, (139324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76546 states to 76546 states and 139324 transitions. [2021-08-21 18:29:16,523 INFO L78 Accepts]: Start accepts. Automaton has 76546 states and 139324 transitions. Word has length 61 [2021-08-21 18:29:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:29:16,524 INFO L470 AbstractCegarLoop]: Abstraction has 76546 states and 139324 transitions. [2021-08-21 18:29:16,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 76546 states and 139324 transitions. [2021-08-21 18:29:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:29:16,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:29:16,642 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:29:16,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:29:16,869 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 18:29:16,870 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:29:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:29:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2048242694, now seen corresponding path program 52 times [2021-08-21 18:29:16,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:29:16,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653576751] [2021-08-21 18:29:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:29:16,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:29:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:29:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:29:18,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:29:18,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653576751] [2021-08-21 18:29:18,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653576751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:18,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128478934] [2021-08-21 18:29:18,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:29:18,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:29:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:29:18,063 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 18:29:18,064 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 18:29:21,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:29:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:29:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:29:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:29:23,072 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:29:23,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-08-21 18:29:23,721 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:29:23,722 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 217 treesize of output 183 [2021-08-21 18:29:23,750 INFO L354 Elim1Store]: treesize reduction 83, result has 21.0 percent of original size [2021-08-21 18:29:23,750 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 183 treesize of output 164 [2021-08-21 18:29:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:29:24,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128478934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:24,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:29:24,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 42 [2021-08-21 18:29:24,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304490267] [2021-08-21 18:29:24,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:29:24,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:29:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:29:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:29:24,179 INFO L87 Difference]: Start difference. First operand 76546 states and 139324 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:29:28,866 INFO L93 Difference]: Finished difference Result 142216 states and 263013 transitions. [2021-08-21 18:29:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 18:29:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:29:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:29:29,167 INFO L225 Difference]: With dead ends: 142216 [2021-08-21 18:29:29,167 INFO L226 Difference]: Without dead ends: 141478 [2021-08-21 18:29:29,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 4227.2ms TimeCoverageRelationStatistics Valid=2060, Invalid=8652, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 18:29:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141478 states. [2021-08-21 18:29:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141478 to 76745. [2021-08-21 18:29:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76745 states, 76744 states have (on average 1.820885020327322) internal successors, (139742), 76744 states have internal predecessors, (139742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76745 states to 76745 states and 139742 transitions. [2021-08-21 18:29:31,424 INFO L78 Accepts]: Start accepts. Automaton has 76745 states and 139742 transitions. Word has length 61 [2021-08-21 18:29:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:29:31,424 INFO L470 AbstractCegarLoop]: Abstraction has 76745 states and 139742 transitions. [2021-08-21 18:29:31,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 76745 states and 139742 transitions. [2021-08-21 18:29:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:29:31,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:29:31,547 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:29:31,575 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 18:29:31,772 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 18:29:31,773 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:29:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:29:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1781578110, now seen corresponding path program 53 times [2021-08-21 18:29:31,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:29:31,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361287277] [2021-08-21 18:29:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:29:31,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:29:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:29:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:29:32,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:29:32,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361287277] [2021-08-21 18:29:32,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361287277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:32,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311902962] [2021-08-21 18:29:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:29:32,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:29:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:29:32,549 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 18:29:32,597 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 18:29:36,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:29:36,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:29:36,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:29:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:29:37,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 18:29:38,088 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:29:38,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 138 [2021-08-21 18:29:38,092 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:29:38,092 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 138 treesize of output 100 [2021-08-21 18:29:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:29:38,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311902962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:38,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:29:38,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 32 [2021-08-21 18:29:38,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829049921] [2021-08-21 18:29:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:29:38,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:29:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:29:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:29:38,332 INFO L87 Difference]: Start difference. First operand 76745 states and 139742 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:29:45,497 INFO L93 Difference]: Finished difference Result 140279 states and 251235 transitions. [2021-08-21 18:29:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-08-21 18:29:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:29:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:29:45,812 INFO L225 Difference]: With dead ends: 140279 [2021-08-21 18:29:45,812 INFO L226 Difference]: Without dead ends: 136500 [2021-08-21 18:29:45,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7514 ImplicationChecksByTransitivity, 6215.4ms TimeCoverageRelationStatistics Valid=3515, Invalid=14845, Unknown=0, NotChecked=0, Total=18360 [2021-08-21 18:29:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136500 states. [2021-08-21 18:29:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136500 to 76134. [2021-08-21 18:29:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76134 states, 76133 states have (on average 1.8197759184584872) internal successors, (138545), 76133 states have internal predecessors, (138545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76134 states to 76134 states and 138545 transitions. [2021-08-21 18:29:47,793 INFO L78 Accepts]: Start accepts. Automaton has 76134 states and 138545 transitions. Word has length 61 [2021-08-21 18:29:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:29:47,793 INFO L470 AbstractCegarLoop]: Abstraction has 76134 states and 138545 transitions. [2021-08-21 18:29:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 76134 states and 138545 transitions. [2021-08-21 18:29:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:29:48,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:29:48,092 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:29:48,121 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 18:29:48,308 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 18:29:48,309 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:29:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:29:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash 23322100, now seen corresponding path program 54 times [2021-08-21 18:29:48,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:29:48,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795393276] [2021-08-21 18:29:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:29:48,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:29:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:29:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:29:48,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:29:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795393276] [2021-08-21 18:29:48,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795393276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019624217] [2021-08-21 18:29:48,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:29:48,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:29:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:29:48,703 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 18:29:48,703 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 18:29:52,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:29:52,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:29:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:29:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:29:53,432 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:29:53,432 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 29 treesize of output 13 [2021-08-21 18:29:53,532 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 18:29:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:29:53,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019624217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:29:53,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:29:53,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-08-21 18:29:53,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769768950] [2021-08-21 18:29:53,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:29:53,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:29:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:29:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:29:53,609 INFO L87 Difference]: Start difference. First operand 76134 states and 138545 transitions. Second operand has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:29:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:29:59,440 INFO L93 Difference]: Finished difference Result 122942 states and 215837 transitions. [2021-08-21 18:29:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-21 18:29:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:29:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:29:59,692 INFO L225 Difference]: With dead ends: 122942 [2021-08-21 18:29:59,692 INFO L226 Difference]: Without dead ends: 115694 [2021-08-21 18:29:59,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8884 ImplicationChecksByTransitivity, 4562.4ms TimeCoverageRelationStatistics Valid=3075, Invalid=22685, Unknown=0, NotChecked=0, Total=25760 [2021-08-21 18:29:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115694 states. [2021-08-21 18:30:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115694 to 78190. [2021-08-21 18:30:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78190 states, 78189 states have (on average 1.8125183849390578) internal successors, (141719), 78189 states have internal predecessors, (141719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78190 states to 78190 states and 141719 transitions. [2021-08-21 18:30:01,300 INFO L78 Accepts]: Start accepts. Automaton has 78190 states and 141719 transitions. Word has length 61 [2021-08-21 18:30:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:30:01,300 INFO L470 AbstractCegarLoop]: Abstraction has 78190 states and 141719 transitions. [2021-08-21 18:30:01,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 78190 states and 141719 transitions. [2021-08-21 18:30:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:30:01,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:30:01,420 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:30:01,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:30:01,621 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 18:30:01,621 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:30:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:30:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 346638596, now seen corresponding path program 55 times [2021-08-21 18:30:01,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:30:01,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658378921] [2021-08-21 18:30:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:30:01,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:30:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:30:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:30:02,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:30:02,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658378921] [2021-08-21 18:30:02,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658378921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:02,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335184167] [2021-08-21 18:30:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:30:02,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:30:02,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:30:02,101 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 18:30:02,101 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 18:30:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:30:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:30:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:30:07,694 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:30:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-08-21 18:30:08,263 INFO L354 Elim1Store]: treesize reduction 83, result has 21.0 percent of original size [2021-08-21 18:30:08,264 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 217 treesize of output 198 [2021-08-21 18:30:08,269 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:30:08,270 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 184 treesize of output 150 [2021-08-21 18:30:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:30:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335184167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:08,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:30:08,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-08-21 18:30:08,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921079511] [2021-08-21 18:30:08,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:30:08,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:30:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:30:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:30:08,681 INFO L87 Difference]: Start difference. First operand 78190 states and 141719 transitions. Second operand has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:30:17,354 INFO L93 Difference]: Finished difference Result 194060 states and 352658 transitions. [2021-08-21 18:30:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-08-21 18:30:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:30:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:30:18,017 INFO L225 Difference]: With dead ends: 194060 [2021-08-21 18:30:18,017 INFO L226 Difference]: Without dead ends: 192057 [2021-08-21 18:30:18,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25745 ImplicationChecksByTransitivity, 6751.6ms TimeCoverageRelationStatistics Valid=5515, Invalid=53291, Unknown=0, NotChecked=0, Total=58806 [2021-08-21 18:30:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192057 states. [2021-08-21 18:30:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192057 to 98130. [2021-08-21 18:30:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98130 states, 98129 states have (on average 1.8457642491006736) internal successors, (181123), 98129 states have internal predecessors, (181123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98130 states to 98130 states and 181123 transitions. [2021-08-21 18:30:20,616 INFO L78 Accepts]: Start accepts. Automaton has 98130 states and 181123 transitions. Word has length 61 [2021-08-21 18:30:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:30:20,616 INFO L470 AbstractCegarLoop]: Abstraction has 98130 states and 181123 transitions. [2021-08-21 18:30:20,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 98130 states and 181123 transitions. [2021-08-21 18:30:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:30:20,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:30:20,758 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:30:20,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:30:20,958 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 18:30:20,958 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:30:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:30:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -982200346, now seen corresponding path program 56 times [2021-08-21 18:30:20,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:30:20,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391901968] [2021-08-21 18:30:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:30:20,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:30:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:30:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:30:21,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:30:21,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391901968] [2021-08-21 18:30:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391901968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:21,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935940638] [2021-08-21 18:30:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:30:21,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:30:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:30:21,322 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 18:30:21,322 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 18:30:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:30:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:30:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:30:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:30:27,280 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:30:27,280 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 76 treesize of output 58 [2021-08-21 18:30:27,291 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 7 treesize of output 3 [2021-08-21 18:30:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:30:27,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935940638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:27,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:30:27,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 18:30:27,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581794916] [2021-08-21 18:30:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:30:27,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:30:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:30:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:30:27,393 INFO L87 Difference]: Start difference. First operand 98130 states and 181123 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:30:30,273 INFO L93 Difference]: Finished difference Result 136835 states and 247596 transitions. [2021-08-21 18:30:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 18:30:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:30:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:30:30,565 INFO L225 Difference]: With dead ends: 136835 [2021-08-21 18:30:30,565 INFO L226 Difference]: Without dead ends: 129022 [2021-08-21 18:30:30,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2303.6ms TimeCoverageRelationStatistics Valid=1049, Invalid=4501, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:30:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129022 states. [2021-08-21 18:30:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129022 to 98498. [2021-08-21 18:30:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98498 states, 98497 states have (on average 1.8411423698183702) internal successors, (181347), 98497 states have internal predecessors, (181347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98498 states to 98498 states and 181347 transitions. [2021-08-21 18:30:32,826 INFO L78 Accepts]: Start accepts. Automaton has 98498 states and 181347 transitions. Word has length 61 [2021-08-21 18:30:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:30:32,826 INFO L470 AbstractCegarLoop]: Abstraction has 98498 states and 181347 transitions. [2021-08-21 18:30:32,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 98498 states and 181347 transitions. [2021-08-21 18:30:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:30:32,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:30:32,969 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:30:32,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 18:30:33,169 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 18:30:33,171 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:30:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:30:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1049687582, now seen corresponding path program 57 times [2021-08-21 18:30:33,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:30:33,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581442619] [2021-08-21 18:30:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:30:33,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:30:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:30:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:30:33,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:30:33,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581442619] [2021-08-21 18:30:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581442619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:33,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909701410] [2021-08-21 18:30:33,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:30:33,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:30:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:30:33,775 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 18:30:33,776 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 18:30:38,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 18:30:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:30:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:30:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:30:38,740 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:30:38,740 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 29 treesize of output 13 [2021-08-21 18:30:38,807 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 18:30:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:30:38,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909701410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:38,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:30:38,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-08-21 18:30:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927571960] [2021-08-21 18:30:38,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:30:38,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:30:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:30:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:30:38,872 INFO L87 Difference]: Start difference. First operand 98498 states and 181347 transitions. Second operand has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:30:48,119 INFO L93 Difference]: Finished difference Result 147836 states and 263341 transitions. [2021-08-21 18:30:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-08-21 18:30:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:30:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:30:48,414 INFO L225 Difference]: With dead ends: 147836 [2021-08-21 18:30:48,414 INFO L226 Difference]: Without dead ends: 139295 [2021-08-21 18:30:48,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23121 ImplicationChecksByTransitivity, 7351.8ms TimeCoverageRelationStatistics Valid=5843, Invalid=49147, Unknown=0, NotChecked=0, Total=54990 [2021-08-21 18:30:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139295 states. [2021-08-21 18:30:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139295 to 101728. [2021-08-21 18:30:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101728 states, 101727 states have (on average 1.8415464920817481) internal successors, (187335), 101727 states have internal predecessors, (187335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101728 states to 101728 states and 187335 transitions. [2021-08-21 18:30:50,539 INFO L78 Accepts]: Start accepts. Automaton has 101728 states and 187335 transitions. Word has length 61 [2021-08-21 18:30:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:30:50,539 INFO L470 AbstractCegarLoop]: Abstraction has 101728 states and 187335 transitions. [2021-08-21 18:30:50,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.033333333333333) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:30:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 101728 states and 187335 transitions. [2021-08-21 18:30:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:30:51,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:30:51,018 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:30:51,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:30:51,244 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 18:30:51,245 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:30:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:30:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1492290086, now seen corresponding path program 58 times [2021-08-21 18:30:51,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:30:51,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140333370] [2021-08-21 18:30:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:30:51,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:30:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:30:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:30:52,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:30:52,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140333370] [2021-08-21 18:30:52,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140333370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:52,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865128936] [2021-08-21 18:30:52,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:30:52,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:30:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:30:52,476 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 18:30:52,477 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 18:30:57,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:30:57,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:30:57,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:30:57,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:30:58,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:30:58,094 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 43 treesize of output 31 [2021-08-21 18:30:58,769 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:30:58,769 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 217 treesize of output 183 [2021-08-21 18:30:58,798 INFO L354 Elim1Store]: treesize reduction 83, result has 21.0 percent of original size [2021-08-21 18:30:58,798 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 183 treesize of output 164 [2021-08-21 18:30:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:30:59,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865128936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:30:59,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:30:59,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 39 [2021-08-21 18:30:59,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089693048] [2021-08-21 18:30:59,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:30:59,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:30:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:30:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:30:59,262 INFO L87 Difference]: Start difference. First operand 101728 states and 187335 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:31:03,812 INFO L93 Difference]: Finished difference Result 171072 states and 309382 transitions. [2021-08-21 18:31:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:31:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:31:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:31:04,376 INFO L225 Difference]: With dead ends: 171072 [2021-08-21 18:31:04,377 INFO L226 Difference]: Without dead ends: 168791 [2021-08-21 18:31:04,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 3936.0ms TimeCoverageRelationStatistics Valid=1806, Invalid=6936, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 18:31:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168791 states. [2021-08-21 18:31:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168791 to 103096. [2021-08-21 18:31:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103096 states, 103095 states have (on average 1.8407585236917405) internal successors, (189773), 103095 states have internal predecessors, (189773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103096 states to 103096 states and 189773 transitions. [2021-08-21 18:31:06,856 INFO L78 Accepts]: Start accepts. Automaton has 103096 states and 189773 transitions. Word has length 61 [2021-08-21 18:31:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:31:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 103096 states and 189773 transitions. [2021-08-21 18:31:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 103096 states and 189773 transitions. [2021-08-21 18:31:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:31:07,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:31:07,326 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:31:07,357 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 18:31:07,529 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 18:31:07,529 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:31:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:31:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1061482982, now seen corresponding path program 59 times [2021-08-21 18:31:07,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:31:07,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585658517] [2021-08-21 18:31:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:31:07,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:31:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:31:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:31:08,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:31:08,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585658517] [2021-08-21 18:31:08,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585658517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:31:08,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875448820] [2021-08-21 18:31:08,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:31:08,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:31:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:31:08,712 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 18:31:08,713 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 18:31:13,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:31:13,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:31:13,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:31:13,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:31:14,437 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:31:14,438 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 167 treesize of output 157 [2021-08-21 18:31:14,963 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:31:14,964 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 43 treesize of output 34 [2021-08-21 18:31:15,098 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 18:31:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:31:15,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875448820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:31:15,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:31:15,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 44 [2021-08-21 18:31:15,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118378021] [2021-08-21 18:31:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:31:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:31:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:31:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:31:15,195 INFO L87 Difference]: Start difference. First operand 103096 states and 189773 transitions. Second operand has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:31:52,810 INFO L93 Difference]: Finished difference Result 246143 states and 443082 transitions. [2021-08-21 18:31:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 536 states. [2021-08-21 18:31:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:31:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:31:53,617 INFO L225 Difference]: With dead ends: 246143 [2021-08-21 18:31:53,617 INFO L226 Difference]: Without dead ends: 244330 [2021-08-21 18:31:53,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 563 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147563 ImplicationChecksByTransitivity, 31821.4ms TimeCoverageRelationStatistics Valid=27033, Invalid=291627, Unknown=0, NotChecked=0, Total=318660 [2021-08-21 18:31:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244330 states. [2021-08-21 18:31:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244330 to 105075. [2021-08-21 18:31:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105075 states, 105074 states have (on average 1.8545120581685288) internal successors, (194861), 105074 states have internal predecessors, (194861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105075 states to 105075 states and 194861 transitions. [2021-08-21 18:31:56,693 INFO L78 Accepts]: Start accepts. Automaton has 105075 states and 194861 transitions. Word has length 61 [2021-08-21 18:31:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:31:56,693 INFO L470 AbstractCegarLoop]: Abstraction has 105075 states and 194861 transitions. [2021-08-21 18:31:56,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:31:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 105075 states and 194861 transitions. [2021-08-21 18:31:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:31:57,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:31:57,138 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:31:57,170 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 18:31:57,338 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 18:31:57,339 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:31:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:31:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash -579248946, now seen corresponding path program 60 times [2021-08-21 18:31:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:31:57,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681866366] [2021-08-21 18:31:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:31:57,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:31:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:31:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:31:58,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:31:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681866366] [2021-08-21 18:31:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681866366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:31:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520720113] [2021-08-21 18:31:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:31:58,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:31:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:31:58,586 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 18:31:58,586 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 18:32:03,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:32:03,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:32:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:04,330 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:32:04,330 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 110 treesize of output 100 [2021-08-21 18:32:04,524 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:32:04,524 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 35 treesize of output 23 [2021-08-21 18:32:04,646 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 21 treesize of output 17 [2021-08-21 18:32:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:32:04,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520720113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:04,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:04,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 44 [2021-08-21 18:32:04,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064143507] [2021-08-21 18:32:04,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:32:04,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:04,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:32:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:32:04,790 INFO L87 Difference]: Start difference. First operand 105075 states and 194861 transitions. Second operand has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:26,232 INFO L93 Difference]: Finished difference Result 266404 states and 480705 transitions. [2021-08-21 18:32:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-08-21 18:32:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:32:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:27,070 INFO L225 Difference]: With dead ends: 266404 [2021-08-21 18:32:27,070 INFO L226 Difference]: Without dead ends: 265902 [2021-08-21 18:32:27,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44629 ImplicationChecksByTransitivity, 18324.2ms TimeCoverageRelationStatistics Valid=12182, Invalid=94420, Unknown=0, NotChecked=0, Total=106602 [2021-08-21 18:32:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265902 states. [2021-08-21 18:32:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265902 to 105305. [2021-08-21 18:32:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105305 states, 105304 states have (on average 1.8550577375978121) internal successors, (195345), 105304 states have internal predecessors, (195345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105305 states to 105305 states and 195345 transitions. [2021-08-21 18:32:30,235 INFO L78 Accepts]: Start accepts. Automaton has 105305 states and 195345 transitions. Word has length 61 [2021-08-21 18:32:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 105305 states and 195345 transitions. [2021-08-21 18:32:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 105305 states and 195345 transitions. [2021-08-21 18:32:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:32:30,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:30,740 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:30,773 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 18:32:30,952 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 18:32:30,953 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1986913984, now seen corresponding path program 61 times [2021-08-21 18:32:30,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:30,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524203521] [2021-08-21 18:32:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:30,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:31,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524203521] [2021-08-21 18:32:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524203521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:31,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129597994] [2021-08-21 18:32:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:32:31,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:31,395 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 18:32:31,396 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 18:32:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:36,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:32:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:37,931 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:32:37,932 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 138 treesize of output 114 [2021-08-21 18:32:38,518 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:32:38,519 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 234 treesize of output 200 [2021-08-21 18:32:38,523 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:32:38,523 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 200 treesize of output 142 [2021-08-21 18:32:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:32:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129597994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:38,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-08-21 18:32:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223506909] [2021-08-21 18:32:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:32:38,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:32:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:32:38,801 INFO L87 Difference]: Start difference. First operand 105305 states and 195345 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:45,995 INFO L93 Difference]: Finished difference Result 152079 states and 277632 transitions. [2021-08-21 18:32:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-21 18:32:45,995 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:32:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:46,316 INFO L225 Difference]: With dead ends: 152079 [2021-08-21 18:32:46,317 INFO L226 Difference]: Without dead ends: 147193 [2021-08-21 18:32:46,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5571 ImplicationChecksByTransitivity, 5653.7ms TimeCoverageRelationStatistics Valid=1990, Invalid=14012, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 18:32:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147193 states. [2021-08-21 18:32:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147193 to 104912. [2021-08-21 18:32:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104912 states, 104911 states have (on average 1.854915118529039) internal successors, (194601), 104911 states have internal predecessors, (194601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104912 states to 104912 states and 194601 transitions. [2021-08-21 18:32:48,724 INFO L78 Accepts]: Start accepts. Automaton has 104912 states and 194601 transitions. Word has length 61 [2021-08-21 18:32:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 104912 states and 194601 transitions. [2021-08-21 18:32:48,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 104912 states and 194601 transitions. [2021-08-21 18:32:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:32:48,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:48,903 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:48,934 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 18:32:49,103 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 18:32:49,104 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash -404525806, now seen corresponding path program 62 times [2021-08-21 18:32:49,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:49,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788022190] [2021-08-21 18:32:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:49,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:49,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:49,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788022190] [2021-08-21 18:32:49,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788022190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:49,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371204883] [2021-08-21 18:32:49,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:49,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:49,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:49,606 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 18:32:49,606 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 18:32:54,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:32:54,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:56,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:32:56,172 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 43 treesize of output 31 [2021-08-21 18:32:56,704 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-21 18:32:56,704 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 184 treesize of output 176 [2021-08-21 18:32:56,724 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 18:32:56,725 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 170 treesize of output 164 [2021-08-21 18:32:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:32:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371204883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:57,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-08-21 18:32:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161977606] [2021-08-21 18:32:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:32:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:32:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:32:57,116 INFO L87 Difference]: Start difference. First operand 104912 states and 194601 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:04,526 INFO L93 Difference]: Finished difference Result 188507 states and 344713 transitions. [2021-08-21 18:33:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-08-21 18:33:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:33:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:04,943 INFO L225 Difference]: With dead ends: 188507 [2021-08-21 18:33:04,944 INFO L226 Difference]: Without dead ends: 186762 [2021-08-21 18:33:04,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17648 ImplicationChecksByTransitivity, 5384.1ms TimeCoverageRelationStatistics Valid=4459, Invalid=37361, Unknown=0, NotChecked=0, Total=41820 [2021-08-21 18:33:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186762 states. [2021-08-21 18:33:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186762 to 107184. [2021-08-21 18:33:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107184 states, 107183 states have (on average 1.858195795975108) internal successors, (199167), 107183 states have internal predecessors, (199167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107184 states to 107184 states and 199167 transitions. [2021-08-21 18:33:07,612 INFO L78 Accepts]: Start accepts. Automaton has 107184 states and 199167 transitions. Word has length 61 [2021-08-21 18:33:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:07,612 INFO L470 AbstractCegarLoop]: Abstraction has 107184 states and 199167 transitions. [2021-08-21 18:33:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 107184 states and 199167 transitions. [2021-08-21 18:33:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:33:07,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:07,810 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:07,846 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 18:33:08,014 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 18:33:08,015 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 85661556, now seen corresponding path program 63 times [2021-08-21 18:33:08,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:08,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111813756] [2021-08-21 18:33:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:08,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:09,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:09,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111813756] [2021-08-21 18:33:09,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111813756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:09,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833931871] [2021-08-21 18:33:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:33:09,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:09,360 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 18:33:09,361 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 18:33:14,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:33:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:33:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:15,805 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:33:15,806 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 119 treesize of output 109 [2021-08-21 18:33:16,173 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:33:16,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 18:33:16,401 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:33:16,401 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 19 treesize of output 18 [2021-08-21 18:33:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833931871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:16,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:16,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20] total 46 [2021-08-21 18:33:16,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799065055] [2021-08-21 18:33:16,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:33:16,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:33:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1988, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:33:16,488 INFO L87 Difference]: Start difference. First operand 107184 states and 199167 transitions. Second operand has 47 states, 47 states have (on average 2.574468085106383) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:34,085 INFO L93 Difference]: Finished difference Result 202369 states and 373043 transitions. [2021-08-21 18:33:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-08-21 18:33:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.574468085106383) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:33:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:34,639 INFO L225 Difference]: With dead ends: 202369 [2021-08-21 18:33:34,639 INFO L226 Difference]: Without dead ends: 202290 [2021-08-21 18:33:34,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21975 ImplicationChecksByTransitivity, 14178.2ms TimeCoverageRelationStatistics Valid=7714, Invalid=47746, Unknown=0, NotChecked=0, Total=55460 [2021-08-21 18:33:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202290 states. [2021-08-21 18:33:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202290 to 108111. [2021-08-21 18:33:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108111 states, 108110 states have (on average 1.860068448802146) internal successors, (201092), 108110 states have internal predecessors, (201092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108111 states to 108111 states and 201092 transitions. [2021-08-21 18:33:37,272 INFO L78 Accepts]: Start accepts. Automaton has 108111 states and 201092 transitions. Word has length 61 [2021-08-21 18:33:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:37,272 INFO L470 AbstractCegarLoop]: Abstraction has 108111 states and 201092 transitions. [2021-08-21 18:33:37,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.574468085106383) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 108111 states and 201092 transitions. [2021-08-21 18:33:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:33:37,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:37,461 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:37,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:37,661 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 18:33:37,661 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash 18430542, now seen corresponding path program 64 times [2021-08-21 18:33:37,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:37,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425925843] [2021-08-21 18:33:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:37,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:39,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:39,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425925843] [2021-08-21 18:33:39,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425925843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:39,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252281036] [2021-08-21 18:33:39,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:33:39,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:39,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:39,467 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 18:33:39,467 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 18:33:44,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:33:44,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:44,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:33:44,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:45,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:33:45,648 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 41 treesize of output 29 [2021-08-21 18:33:46,442 INFO L354 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2021-08-21 18:33:46,443 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 246 treesize of output 246 [2021-08-21 18:33:46,448 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:33:46,448 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 246 treesize of output 188 [2021-08-21 18:33:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:33:46,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252281036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:46,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:46,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 42 [2021-08-21 18:33:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437666269] [2021-08-21 18:33:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:33:46,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:33:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:33:46,984 INFO L87 Difference]: Start difference. First operand 108111 states and 201092 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:51,524 INFO L93 Difference]: Finished difference Result 182890 states and 338046 transitions. [2021-08-21 18:33:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:33:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:33:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:51,989 INFO L225 Difference]: With dead ends: 182890 [2021-08-21 18:33:51,989 INFO L226 Difference]: Without dead ends: 181096 [2021-08-21 18:33:51,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 3641.6ms TimeCoverageRelationStatistics Valid=1445, Invalid=5361, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:33:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181096 states. [2021-08-21 18:33:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181096 to 109946. [2021-08-21 18:33:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109946 states, 109945 states have (on average 1.8672427122652235) internal successors, (205294), 109945 states have internal predecessors, (205294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109946 states to 109946 states and 205294 transitions. [2021-08-21 18:33:54,768 INFO L78 Accepts]: Start accepts. Automaton has 109946 states and 205294 transitions. Word has length 61 [2021-08-21 18:33:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:54,768 INFO L470 AbstractCegarLoop]: Abstraction has 109946 states and 205294 transitions. [2021-08-21 18:33:54,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 109946 states and 205294 transitions. [2021-08-21 18:33:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:33:54,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:54,974 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:55,008 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 18:33:55,176 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 18:33:55,177 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1302062550, now seen corresponding path program 65 times [2021-08-21 18:33:55,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:55,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050624652] [2021-08-21 18:33:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:55,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:56,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:56,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050624652] [2021-08-21 18:33:56,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050624652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:56,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272526853] [2021-08-21 18:33:56,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:33:56,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:56,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:56,222 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 18:33:56,225 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 18:34:01,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:34:01,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:34:01,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:02,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:34:02,751 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 105 treesize of output 95 [2021-08-21 18:34:02,967 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:34:02,967 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 25 treesize of output 13 [2021-08-21 18:34:03,034 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 18:34:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:34:03,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272526853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:03,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:03,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 43 [2021-08-21 18:34:03,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131366602] [2021-08-21 18:34:03,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:34:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:34:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:34:03,123 INFO L87 Difference]: Start difference. First operand 109946 states and 205294 transitions. Second operand has 44 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:21,490 INFO L93 Difference]: Finished difference Result 214408 states and 390927 transitions. [2021-08-21 18:34:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-08-21 18:34:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:34:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:22,048 INFO L225 Difference]: With dead ends: 214408 [2021-08-21 18:34:22,048 INFO L226 Difference]: Without dead ends: 214357 [2021-08-21 18:34:22,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47743 ImplicationChecksByTransitivity, 14690.3ms TimeCoverageRelationStatistics Valid=8886, Invalid=106374, Unknown=0, NotChecked=0, Total=115260 Received shutdown request... [2021-08-21 18:34:22,165 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:34:22,173 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 18:34:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214357 states. [2021-08-21 18:34:22,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:34:22,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:22,492 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 18:34:22,492 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2021-08-21 18:34:22,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:34:22,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:34:22,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:34:22,497 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:34:22,497 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:34:22,499 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:34:22 BasicIcfg [2021-08-21 18:34:22,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:34:22,499 INFO L168 Benchmark]: Toolchain (without parser) took 726886.87 ms. Allocated memory was 211.8 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 190.9 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 8.0 GB. [2021-08-21 18:34:22,499 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 192.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:34:22,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 211.8 MB. Free memory was 190.9 MB in the beginning and 189.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:22,499 INFO L168 Benchmark]: Boogie Preprocessor took 20.20 ms. Allocated memory is still 211.8 MB. Free memory was 189.4 MB in the beginning and 188.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:22,500 INFO L168 Benchmark]: RCFGBuilder took 320.01 ms. Allocated memory is still 211.8 MB. Free memory was 188.2 MB in the beginning and 168.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:22,500 INFO L168 Benchmark]: TraceAbstraction took 726517.56 ms. Allocated memory was 211.8 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 168.5 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 8.0 GB. [2021-08-21 18:34:22,500 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 192.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 211.8 MB. Free memory was 190.9 MB in the beginning and 189.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.20 ms. Allocated memory is still 211.8 MB. Free memory was 189.4 MB in the beginning and 188.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.01 ms. Allocated memory is still 211.8 MB. Free memory was 188.2 MB in the beginning and 168.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 726517.56 ms. Allocated memory was 211.8 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 168.5 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 777, positive: 712, positive conditional: 712, positive unconditional: 0, negative: 65, negative conditional: 65, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 720, positive: 712, positive conditional: 0, positive unconditional: 712, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 173, positive: 171, positive conditional: 0, positive unconditional: 171, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 173, positive: 168, positive conditional: 0, positive unconditional: 168, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 16, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 720, positive: 541, positive conditional: 0, positive unconditional: 541, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 173, unknown conditional: 0, unknown unconditional: 173] , Statistics on independence cache: Total cache size (in pairs): 173, Positive cache size: 171, Positive conditional cache size: 0, Positive unconditional cache size: 171, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 57 - 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: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 726428.4ms, OverallIterations: 67, TraceHistogramMax: 7, EmptinessCheckTime: 6196.3ms, AutomataDifference: 392194.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 110.0ms, PartialOrderReductionTime: 100.0ms, HoareTripleCheckerStatistics: 5992 SDtfs, 40092 SDslu, 91266 SDs, 0 SdLazy, 136886 SolverSat, 12825 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64038.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10808 GetRequests, 2732 SyntacticMatches, 48 SemanticMatches, 8028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753044 ImplicationChecksByTransitivity, 317435.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=109946occurred in iteration=66, InterpolantAutomatonStates: 7057, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59242.3ms AutomataMinimizationTime, 67 MinimizatonAttempts, 1825545 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 485.6ms SsaConstructionTime, 2449.9ms SatisfiabilityAnalysisTime, 107430.6ms InterpolantComputationTime, 7017 NumberOfCodeBlocks, 7017 NumberOfCodeBlocksAsserted, 309 NumberOfCheckSat, 6886 ConstructedInterpolants, 67 QuantifiedInterpolants, 125134 SizeOfPredicates, 695 NumberOfNonLiveVariables, 8945 ConjunctsInSsa, 1681 ConjunctsInUnsatCore, 131 InterpolantComputations, 3 PerfectInterpolantSequences, 924/7421 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