/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:43:50,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:43:50,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:43:50,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:43:50,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:43:50,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:43:50,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:43:50,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:43:50,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:43:50,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:43:50,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:43:50,762 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:43:50,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:43:50,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:43:50,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:43:50,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:43:50,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:43:50,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:43:50,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:43:50,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:43:50,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:43:50,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:43:50,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:43:51,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:43:51,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:43:51,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:43:51,022 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:43:51,023 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:43:51,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2021-08-21 12:43:51,023 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2021-08-21 12:43:51,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:43:51,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:43:51,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:43:51,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:43:51,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:43:51,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:43:51,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:43:51,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:43:51,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:43:51,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:43:51,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:43:51,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:43:51,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:43:51,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/1) ... [2021-08-21 12:43:51,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:43:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:51,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:43:51,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:43:51,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:43:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:43:51,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:43:51,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:43:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:43:51,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:43:51,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:43:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:43:51,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:43:51,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:43:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:43:51,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:43:51,262 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:43:51,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:43:51,434 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:43:51,436 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:43:51 BoogieIcfgContainer [2021-08-21 12:43:51,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:43:51,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:43:51,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:43:51,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:43:51,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:51" (1/2) ... [2021-08-21 12:43:51,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3ebbd9 and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:43:51, skipping insertion in model container [2021-08-21 12:43:51,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:43:51" (2/2) ... [2021-08-21 12:43:51,441 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2021-08-21 12:43:51,444 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:43:51,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:43:51,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:43:51,444 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:43:51,499 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:43:51,546 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:43:51,550 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:43:51,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:43:51,556 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-08-21 12:43:51,630 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:43:51,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:51,655 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:51,655 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1079038960, now seen corresponding path program 1 times [2021-08-21 12:43:51,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:51,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535385907] [2021-08-21 12:43:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:51,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:51,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535385907] [2021-08-21 12:43:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535385907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:51,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:43:51,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598093645] [2021-08-21 12:43:51,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:43:51,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:43:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:43:51,805 INFO L87 Difference]: Start difference. First operand has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:51,845 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-08-21 12:43:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:43:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:43:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:51,865 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:43:51,865 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:43:51,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:43:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:43:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-08-21 12:43:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-08-21 12:43:51,938 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-08-21 12:43:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-08-21 12:43:51,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-08-21 12:43:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:43:51,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:51,944 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 12:43:51,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:43:51,946 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -589825538, now seen corresponding path program 1 times [2021-08-21 12:43:51,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:51,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769830617] [2021-08-21 12:43:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:51,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:51,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:51,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769830617] [2021-08-21 12:43:51,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769830617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:51,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:51,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:43:51,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138034099] [2021-08-21 12:43:51,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:43:51,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:43:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:43:51,988 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. 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 12:43:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:52,008 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-08-21 12:43:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:43:52,009 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 12:43:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:52,015 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:43:52,015 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:43:52,016 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 12:43:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:43:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-08-21 12:43:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-08-21 12:43:52,044 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-08-21 12:43:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:52,044 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-08-21 12:43:52,051 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 12:43:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-08-21 12:43:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:52,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:52,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:52,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:43:52,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1708981119, now seen corresponding path program 1 times [2021-08-21 12:43:52,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:52,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393511191] [2021-08-21 12:43:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:52,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:52,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:52,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393511191] [2021-08-21 12:43:52,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393511191] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:52,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:52,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:43:52,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347195299] [2021-08-21 12:43:52,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:43:52,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:43:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:43:52,109 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:52,115 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-08-21 12:43:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:43:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:52,118 INFO L225 Difference]: With dead ends: 463 [2021-08-21 12:43:52,118 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:43:52,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:43:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:43:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-08-21 12:43:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-08-21 12:43:52,132 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-08-21 12:43:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:52,132 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-08-21 12:43:52,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-08-21 12:43:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:52,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:52,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:52,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:43:52,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1600956287, now seen corresponding path program 2 times [2021-08-21 12:43:52,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:52,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082162180] [2021-08-21 12:43:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:52,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:52,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:52,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082162180] [2021-08-21 12:43:52,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082162180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:52,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564738055] [2021-08-21 12:43:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:43:52,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:52,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:52,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:43:52,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:43:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:43:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:52,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:43:52,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:43:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:53,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564738055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:53,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:53,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-21 12:43:53,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698761600] [2021-08-21 12:43:53,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:43:53,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:43:53,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:43:53,190 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:54,068 INFO L93 Difference]: Finished difference Result 1470 states and 4324 transitions. [2021-08-21 12:43:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:43:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:54,075 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 12:43:54,075 INFO L226 Difference]: Without dead ends: 1408 [2021-08-21 12:43:54,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 798.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:43:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-08-21 12:43:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 637. [2021-08-21 12:43:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2021-08-21 12:43:54,093 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2021-08-21 12:43:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2021-08-21 12:43:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2021-08-21 12:43:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:54,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:54,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:54,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 12:43:54,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:54,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash -997704769, now seen corresponding path program 3 times [2021-08-21 12:43:54,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:54,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765245152] [2021-08-21 12:43:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:54,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:54,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:54,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765245152] [2021-08-21 12:43:54,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765245152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:54,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049196839] [2021-08-21 12:43:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:43:54,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:54,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:54,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:43:54,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:43:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:43:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:54,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:43:54,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:43:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:55,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049196839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:55,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 12:43:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529907160] [2021-08-21 12:43:55,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:43:55,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:43:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:43:55,103 INFO L87 Difference]: Start difference. First operand 637 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:55,774 INFO L93 Difference]: Finished difference Result 1386 states and 3964 transitions. [2021-08-21 12:43:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:43:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:55,780 INFO L225 Difference]: With dead ends: 1386 [2021-08-21 12:43:55,780 INFO L226 Difference]: Without dead ends: 1334 [2021-08-21 12:43:55,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:43:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-08-21 12:43:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 755. [2021-08-21 12:43:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2021-08-21 12:43:55,802 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2021-08-21 12:43:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:55,803 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2021-08-21 12:43:55,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2021-08-21 12:43:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:43:55,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:55,805 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 12:43:55,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:56,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:56,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash -126935638, now seen corresponding path program 1 times [2021-08-21 12:43:56,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:56,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501576756] [2021-08-21 12:43:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:56,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:56,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:56,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501576756] [2021-08-21 12:43:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501576756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:56,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570746035] [2021-08-21 12:43:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:56,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:56,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:56,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:43:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:43:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:43:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:56,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570746035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:56,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:56,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:43:56,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731376553] [2021-08-21 12:43:56,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:43:56,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:43:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:43:56,276 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:56,327 INFO L93 Difference]: Finished difference Result 972 states and 2800 transitions. [2021-08-21 12:43:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:43:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:43:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:56,331 INFO L225 Difference]: With dead ends: 972 [2021-08-21 12:43:56,331 INFO L226 Difference]: Without dead ends: 972 [2021-08-21 12:43:56,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:43:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-08-21 12:43:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 773. [2021-08-21 12:43:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.873056994818653) internal successors, (2218), 772 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2218 transitions. [2021-08-21 12:43:56,348 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2218 transitions. Word has length 28 [2021-08-21 12:43:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:56,348 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2218 transitions. [2021-08-21 12:43:56,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2218 transitions. [2021-08-21 12:43:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:43:56,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:56,350 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:56,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:56,568 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 12:43:56,568 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2132365886, now seen corresponding path program 4 times [2021-08-21 12:43:56,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:56,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18932285] [2021-08-21 12:43:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:56,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:56,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:56,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18932285] [2021-08-21 12:43:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18932285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:56,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411672924] [2021-08-21 12:43:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:43:56,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:56,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:56,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:43:56,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:43:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:43:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:43:56,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411672924] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:56,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:43:56,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-08-21 12:43:56,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328254502] [2021-08-21 12:43:56,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:43:56,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:43:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:43:56,853 INFO L87 Difference]: Start difference. First operand 773 states and 2218 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:56,864 INFO L93 Difference]: Finished difference Result 1430 states and 4086 transitions. [2021-08-21 12:43:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:43:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:43:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:56,869 INFO L225 Difference]: With dead ends: 1430 [2021-08-21 12:43:56,869 INFO L226 Difference]: Without dead ends: 1364 [2021-08-21 12:43:56,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:43:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-08-21 12:43:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1108. [2021-08-21 12:43:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.962962962962963) internal successors, (3280), 1107 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3280 transitions. [2021-08-21 12:43:56,891 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3280 transitions. Word has length 29 [2021-08-21 12:43:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:56,891 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 3280 transitions. [2021-08-21 12:43:56,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3280 transitions. [2021-08-21 12:43:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:43:56,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:56,893 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:56,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:57,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,110 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -788828979, now seen corresponding path program 5 times [2021-08-21 12:43:57,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226720891] [2021-08-21 12:43:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:43:57,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226720891] [2021-08-21 12:43:57,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226720891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:57,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594806252] [2021-08-21 12:43:57,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:43:57,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:57,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:57,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:43:57,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:43:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:43:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:43:57,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594806252] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:57,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:43:57,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-21 12:43:57,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137994583] [2021-08-21 12:43:57,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:43:57,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:43:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:43:57,376 INFO L87 Difference]: Start difference. First operand 1108 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,398 INFO L93 Difference]: Finished difference Result 3088 states and 9151 transitions. [2021-08-21 12:43:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:43:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:43:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,409 INFO L225 Difference]: With dead ends: 3088 [2021-08-21 12:43:57,409 INFO L226 Difference]: Without dead ends: 2925 [2021-08-21 12:43:57,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:43:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-08-21 12:43:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2475. [2021-08-21 12:43:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.0731608730800324) internal successors, (7603), 2474 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 7603 transitions. [2021-08-21 12:43:57,461 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 7603 transitions. Word has length 30 [2021-08-21 12:43:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,461 INFO L470 AbstractCegarLoop]: Abstraction has 2475 states and 7603 transitions. [2021-08-21 12:43:57,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 7603 transitions. [2021-08-21 12:43:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:43:57,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,466 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:57,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1876694586, now seen corresponding path program 2 times [2021-08-21 12:43:57,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544849980] [2021-08-21 12:43:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:43:57,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544849980] [2021-08-21 12:43:57,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544849980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:57,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537760854] [2021-08-21 12:43:57,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:43:57,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:57,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:57,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:43:57,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:43:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:43:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:57,987 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 12:43:58,034 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 12:43:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:43:58,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537760854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:58,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:58,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:43:58,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817405870] [2021-08-21 12:43:58,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:43:58,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:43:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:43:58,084 INFO L87 Difference]: Start difference. First operand 2475 states and 7603 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 12:43:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,243 INFO L93 Difference]: Finished difference Result 3669 states and 11137 transitions. [2021-08-21 12:43:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:43:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 33 [2021-08-21 12:43:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,257 INFO L225 Difference]: With dead ends: 3669 [2021-08-21 12:43:58,257 INFO L226 Difference]: Without dead ends: 3669 [2021-08-21 12:43:58,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:43:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2021-08-21 12:43:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3342. [2021-08-21 12:43:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.0634540556719547) internal successors, (10235), 3341 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 10235 transitions. [2021-08-21 12:43:58,370 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 10235 transitions. Word has length 33 [2021-08-21 12:43:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 10235 transitions. [2021-08-21 12:43:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 12:43:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 10235 transitions. [2021-08-21 12:43:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:43:58,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,377 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:58,414 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 12:43:58,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:58,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:43:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash 760708557, now seen corresponding path program 3 times [2021-08-21 12:43:58,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:58,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903535946] [2021-08-21 12:43:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:58,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:59,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:59,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903535946] [2021-08-21 12:43:59,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903535946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:59,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964614587] [2021-08-21 12:43:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:43:59,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:59,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:59,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:43:59,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:43:59,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:59,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 12:43:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:00,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:00,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-08-21 12:44:00,462 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:44:00,463 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 46 treesize of output 33 [2021-08-21 12:44:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:00,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964614587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:00,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:00,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-21 12:44:00,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921182891] [2021-08-21 12:44:00,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:44:00,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:00,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:44:00,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:44:00,889 INFO L87 Difference]: Start difference. First operand 3342 states and 10235 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:04,320 INFO L93 Difference]: Finished difference Result 6187 states and 18347 transitions. [2021-08-21 12:44:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:44:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:04,382 INFO L225 Difference]: With dead ends: 6187 [2021-08-21 12:44:04,398 INFO L226 Difference]: Without dead ends: 5968 [2021-08-21 12:44:04,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2665.8ms TimeCoverageRelationStatistics Valid=513, Invalid=5649, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 12:44:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-08-21 12:44:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4135. [2021-08-21 12:44:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 3.0246734397677795) internal successors, (12504), 4134 states have internal predecessors, (12504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 12504 transitions. [2021-08-21 12:44:04,581 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 12504 transitions. Word has length 37 [2021-08-21 12:44:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:04,583 INFO L470 AbstractCegarLoop]: Abstraction has 4135 states and 12504 transitions. [2021-08-21 12:44:04,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 12504 transitions. [2021-08-21 12:44:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:04,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:04,591 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:04,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:04,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:04,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:04,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1837952499, now seen corresponding path program 4 times [2021-08-21 12:44:04,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:04,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209182636] [2021-08-21 12:44:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:04,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:05,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:05,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209182636] [2021-08-21 12:44:05,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209182636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:05,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390986989] [2021-08-21 12:44:05,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:05,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:05,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:05,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:44:05,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:44:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:06,401 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:06,401 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 25 treesize of output 13 [2021-08-21 12:44:06,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:06,528 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 29 treesize of output 17 [2021-08-21 12:44:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390986989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:06,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:06,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-08-21 12:44:06,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880891092] [2021-08-21 12:44:06,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:44:06,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:44:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:44:06,959 INFO L87 Difference]: Start difference. First operand 4135 states and 12504 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:44:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:09,070 INFO L93 Difference]: Finished difference Result 4979 states and 14733 transitions. [2021-08-21 12:44:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:44:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 37 [2021-08-21 12:44:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:09,105 INFO L225 Difference]: With dead ends: 4979 [2021-08-21 12:44:09,105 INFO L226 Difference]: Without dead ends: 4828 [2021-08-21 12:44:09,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1638.8ms TimeCoverageRelationStatistics Valid=206, Invalid=2986, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:44:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-08-21 12:44:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4306. [2021-08-21 12:44:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 4305 states have (on average 3.0011614401858306) internal successors, (12920), 4305 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 12920 transitions. [2021-08-21 12:44:09,303 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 12920 transitions. Word has length 37 [2021-08-21 12:44:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:09,304 INFO L470 AbstractCegarLoop]: Abstraction has 4306 states and 12920 transitions. [2021-08-21 12:44:09,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:44:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 12920 transitions. [2021-08-21 12:44:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:09,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:09,323 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:09,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 12:44:09,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:44:09,539 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2020109461, now seen corresponding path program 5 times [2021-08-21 12:44:09,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:09,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516904832] [2021-08-21 12:44:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:09,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:10,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:10,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516904832] [2021-08-21 12:44:10,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516904832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:10,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796447857] [2021-08-21 12:44:10,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:10,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:10,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:10,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:44:10,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:44:10,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:44:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:11,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:11,226 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 31 treesize of output 19 [2021-08-21 12:44:11,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:11,333 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 29 treesize of output 17 [2021-08-21 12:44:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:11,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796447857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:11,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:44:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676735632] [2021-08-21 12:44:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:44:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:44:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:44:11,514 INFO L87 Difference]: Start difference. First operand 4306 states and 12920 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:14,229 INFO L93 Difference]: Finished difference Result 6832 states and 19975 transitions. [2021-08-21 12:44:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:44:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:44:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:14,244 INFO L225 Difference]: With dead ends: 6832 [2021-08-21 12:44:14,244 INFO L226 Difference]: Without dead ends: 6678 [2021-08-21 12:44:14,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2182.1ms TimeCoverageRelationStatistics Valid=584, Invalid=5116, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 12:44:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-08-21 12:44:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 4411. [2021-08-21 12:44:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4410 states have (on average 2.9936507936507937) internal successors, (13202), 4410 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 13202 transitions. [2021-08-21 12:44:14,324 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 13202 transitions. Word has length 37 [2021-08-21 12:44:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 13202 transitions. [2021-08-21 12:44:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 13202 transitions. [2021-08-21 12:44:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:14,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:14,332 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:14,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:14,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:14,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1846096807, now seen corresponding path program 6 times [2021-08-21 12:44:14,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:14,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158075897] [2021-08-21 12:44:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:14,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:15,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:15,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158075897] [2021-08-21 12:44:15,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158075897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:15,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568568502] [2021-08-21 12:44:15,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:15,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:15,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:15,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:44:15,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:44:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:44:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:16,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:16,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:44:16,409 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:16,410 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 29 treesize of output 17 [2021-08-21 12:44:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:16,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568568502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:16,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:16,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:44:16,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453082616] [2021-08-21 12:44:16,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:44:16,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:44:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:16,642 INFO L87 Difference]: Start difference. First operand 4411 states and 13202 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:19,795 INFO L93 Difference]: Finished difference Result 7191 states and 21032 transitions. [2021-08-21 12:44:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:44:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:19,807 INFO L225 Difference]: With dead ends: 7191 [2021-08-21 12:44:19,808 INFO L226 Difference]: Without dead ends: 7051 [2021-08-21 12:44:19,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 2482.2ms TimeCoverageRelationStatistics Valid=542, Invalid=5938, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 12:44:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-08-21 12:44:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 4483. [2021-08-21 12:44:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 2.993083444890674) internal successors, (13415), 4482 states have internal predecessors, (13415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 13415 transitions. [2021-08-21 12:44:19,887 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 13415 transitions. Word has length 37 [2021-08-21 12:44:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:19,887 INFO L470 AbstractCegarLoop]: Abstraction has 4483 states and 13415 transitions. [2021-08-21 12:44:19,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 13415 transitions. [2021-08-21 12:44:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:19,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:19,895 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:19,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:44:20,111 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash 101732801, now seen corresponding path program 7 times [2021-08-21 12:44:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:20,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416193347] [2021-08-21 12:44:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:20,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:20,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:20,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416193347] [2021-08-21 12:44:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416193347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:20,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791692436] [2021-08-21 12:44:20,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:20,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:20,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:20,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:20,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:44:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:44:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:21,764 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:44:21,764 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 29 treesize of output 13 [2021-08-21 12:44:22,113 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:22,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:44:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:22,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791692436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:22,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:22,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:44:22,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949351460] [2021-08-21 12:44:22,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:44:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:44:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:44:22,458 INFO L87 Difference]: Start difference. First operand 4483 states and 13415 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:44:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:25,858 INFO L93 Difference]: Finished difference Result 8111 states and 23774 transitions. [2021-08-21 12:44:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:44:25,858 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:44:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:25,873 INFO L225 Difference]: With dead ends: 8111 [2021-08-21 12:44:25,873 INFO L226 Difference]: Without dead ends: 7892 [2021-08-21 12:44:25,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 3020.2ms TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 12:44:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7892 states. [2021-08-21 12:44:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7892 to 4553. [2021-08-21 12:44:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.9931898066783833) internal successors, (13625), 4552 states have internal predecessors, (13625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 13625 transitions. [2021-08-21 12:44:25,958 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 13625 transitions. Word has length 37 [2021-08-21 12:44:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:25,959 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 13625 transitions. [2021-08-21 12:44:25,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:44:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 13625 transitions. [2021-08-21 12:44:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:25,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:25,971 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:25,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:26,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:44:26,185 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1798039041, now seen corresponding path program 8 times [2021-08-21 12:44:26,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:26,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017077858] [2021-08-21 12:44:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:26,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:26,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:26,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017077858] [2021-08-21 12:44:26,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017077858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:26,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966320530] [2021-08-21 12:44:26,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:26,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:26,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:26,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:44:27,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:44:27,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:27,664 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:44:28,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:28,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:44:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:28,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966320530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:28,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:44:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596914134] [2021-08-21 12:44:28,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:44:28,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:44:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:28,445 INFO L87 Difference]: Start difference. First operand 4553 states and 13625 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:30,924 INFO L93 Difference]: Finished difference Result 5385 states and 15872 transitions. [2021-08-21 12:44:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:44:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:30,934 INFO L225 Difference]: With dead ends: 5385 [2021-08-21 12:44:30,934 INFO L226 Difference]: Without dead ends: 5233 [2021-08-21 12:44:30,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1709.6ms TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 12:44:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-08-21 12:44:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 4573. [2021-08-21 12:44:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4572 states have (on average 2.992782152230971) internal successors, (13683), 4572 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 13683 transitions. [2021-08-21 12:44:31,006 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 13683 transitions. Word has length 37 [2021-08-21 12:44:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:31,007 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 13683 transitions. [2021-08-21 12:44:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 13683 transitions. [2021-08-21 12:44:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:31,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:31,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:31,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:44:31,231 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash -382674115, now seen corresponding path program 9 times [2021-08-21 12:44:31,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:31,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584615467] [2021-08-21 12:44:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:31,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:31,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:31,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584615467] [2021-08-21 12:44:31,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584615467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:31,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417910451] [2021-08-21 12:44:31,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:31,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:31,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:31,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:44:32,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:44:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:44:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:32,889 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:32,889 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 27 treesize of output 15 [2021-08-21 12:44:33,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:33,272 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 39 treesize of output 23 [2021-08-21 12:44:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417910451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:33,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:33,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:44:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662417558] [2021-08-21 12:44:33,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:44:33,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:44:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:44:33,433 INFO L87 Difference]: Start difference. First operand 4573 states and 13683 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:34,683 INFO L93 Difference]: Finished difference Result 5028 states and 14848 transitions. [2021-08-21 12:44:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:44:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:44:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:34,692 INFO L225 Difference]: With dead ends: 5028 [2021-08-21 12:44:34,692 INFO L226 Difference]: Without dead ends: 4978 [2021-08-21 12:44:34,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:44:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-08-21 12:44:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 4567. [2021-08-21 12:44:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 2.993210687691634) internal successors, (13667), 4566 states have internal predecessors, (13667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 13667 transitions. [2021-08-21 12:44:34,771 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 13667 transitions. Word has length 37 [2021-08-21 12:44:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:34,771 INFO L470 AbstractCegarLoop]: Abstraction has 4567 states and 13667 transitions. [2021-08-21 12:44:34,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 13667 transitions. [2021-08-21 12:44:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:34,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:34,779 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:34,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 12:44:35,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:44:35,012 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash -933448495, now seen corresponding path program 10 times [2021-08-21 12:44:35,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:35,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591315366] [2021-08-21 12:44:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:35,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:35,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591315366] [2021-08-21 12:44:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591315366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165361624] [2021-08-21 12:44:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:35,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:35,506 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:35,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:44:36,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:44:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:36,715 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:44:36,715 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 31 treesize of output 15 [2021-08-21 12:44:36,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:36,991 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 29 treesize of output 17 [2021-08-21 12:44:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165361624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:37,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:44:37,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620375659] [2021-08-21 12:44:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:44:37,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:44:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:44:37,297 INFO L87 Difference]: Start difference. First operand 4567 states and 13667 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:44:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:40,889 INFO L93 Difference]: Finished difference Result 8270 states and 24248 transitions. [2021-08-21 12:44:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:44:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:44:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:40,905 INFO L225 Difference]: With dead ends: 8270 [2021-08-21 12:44:40,905 INFO L226 Difference]: Without dead ends: 8051 [2021-08-21 12:44:40,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 2796.1ms TimeCoverageRelationStatistics Valid=570, Invalid=7262, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 12:44:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-08-21 12:44:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 4546. [2021-08-21 12:44:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.9931793179317934) internal successors, (13604), 4545 states have internal predecessors, (13604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 13604 transitions. [2021-08-21 12:44:40,987 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 13604 transitions. Word has length 37 [2021-08-21 12:44:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:40,987 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 13604 transitions. [2021-08-21 12:44:40,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:44:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 13604 transitions. [2021-08-21 12:44:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:40,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:40,994 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:41,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:41,212 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 12:44:41,213 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash 762857745, now seen corresponding path program 11 times [2021-08-21 12:44:41,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:41,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019083796] [2021-08-21 12:44:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:41,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:41,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019083796] [2021-08-21 12:44:41,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019083796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920048638] [2021-08-21 12:44:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:41,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:41,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:41,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:44:42,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:44:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:44:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:43,033 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:43,033 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 27 treesize of output 15 [2021-08-21 12:44:43,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:43,221 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 31 treesize of output 19 [2021-08-21 12:44:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:43,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920048638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:43,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:43,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:44:43,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14657321] [2021-08-21 12:44:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:44:43,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:44:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:44:43,592 INFO L87 Difference]: Start difference. First operand 4546 states and 13604 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:45,644 INFO L93 Difference]: Finished difference Result 5620 states and 16564 transitions. [2021-08-21 12:44:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:44:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:44:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:45,654 INFO L225 Difference]: With dead ends: 5620 [2021-08-21 12:44:45,654 INFO L226 Difference]: Without dead ends: 5454 [2021-08-21 12:44:45,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1455.8ms TimeCoverageRelationStatistics Valid=187, Invalid=2465, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:44:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2021-08-21 12:44:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 4521. [2021-08-21 12:44:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 2.9986725663716816) internal successors, (13554), 4520 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 13554 transitions. [2021-08-21 12:44:45,779 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 13554 transitions. Word has length 37 [2021-08-21 12:44:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 13554 transitions. [2021-08-21 12:44:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:44:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 13554 transitions. [2021-08-21 12:44:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:45,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:45,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:45,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:46,018 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 12:44:46,019 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1095453725, now seen corresponding path program 12 times [2021-08-21 12:44:46,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:46,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001335795] [2021-08-21 12:44:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:46,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:46,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:46,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001335795] [2021-08-21 12:44:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001335795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:46,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140027944] [2021-08-21 12:44:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:46,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:46,505 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:46,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:44:47,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:44:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:44:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:47,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:47,894 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 27 treesize of output 15 [2021-08-21 12:44:48,160 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:48,160 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 31 treesize of output 19 [2021-08-21 12:44:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:48,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140027944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:48,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:48,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:44:48,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681278597] [2021-08-21 12:44:48,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:44:48,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:44:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:48,491 INFO L87 Difference]: Start difference. First operand 4521 states and 13554 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:50,815 INFO L93 Difference]: Finished difference Result 8015 states and 23632 transitions. [2021-08-21 12:44:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 12:44:50,815 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:50,830 INFO L225 Difference]: With dead ends: 8015 [2021-08-21 12:44:50,830 INFO L226 Difference]: Without dead ends: 7772 [2021-08-21 12:44:50,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 2027.8ms TimeCoverageRelationStatistics Valid=465, Invalid=4937, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 12:44:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2021-08-21 12:44:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 4626. [2021-08-21 12:44:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4625 states have (on average 2.998054054054054) internal successors, (13866), 4625 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 13866 transitions. [2021-08-21 12:44:50,925 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 13866 transitions. Word has length 37 [2021-08-21 12:44:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:50,925 INFO L470 AbstractCegarLoop]: Abstraction has 4626 states and 13866 transitions. [2021-08-21 12:44:50,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 13866 transitions. [2021-08-21 12:44:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:50,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:50,934 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:50,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 12:44:51,165 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 12:44:51,166 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash 600852515, now seen corresponding path program 13 times [2021-08-21 12:44:51,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:51,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356847382] [2021-08-21 12:44:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:51,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:51,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:51,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356847382] [2021-08-21 12:44:51,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356847382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:51,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020078074] [2021-08-21 12:44:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:51,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:51,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:51,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:44:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:44:52,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:53,103 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:44:53,104 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 31 treesize of output 15 [2021-08-21 12:44:53,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:53,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:44:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:53,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020078074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:53,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:53,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:44:53,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246731070] [2021-08-21 12:44:53,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:44:53,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:44:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:53,818 INFO L87 Difference]: Start difference. First operand 4626 states and 13866 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:56,249 INFO L93 Difference]: Finished difference Result 5450 states and 16111 transitions. [2021-08-21 12:44:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:44:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:56,259 INFO L225 Difference]: With dead ends: 5450 [2021-08-21 12:44:56,259 INFO L226 Difference]: Without dead ends: 5313 [2021-08-21 12:44:56,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1722.8ms TimeCoverageRelationStatistics Valid=217, Invalid=3205, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:44:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-08-21 12:44:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4635. [2021-08-21 12:44:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 2.9974104445403538) internal successors, (13890), 4634 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 13890 transitions. [2021-08-21 12:44:56,332 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 13890 transitions. Word has length 37 [2021-08-21 12:44:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:56,332 INFO L470 AbstractCegarLoop]: Abstraction has 4635 states and 13890 transitions. [2021-08-21 12:44:56,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 13890 transitions. [2021-08-21 12:44:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:56,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:56,340 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:56,358 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 12:44:56,557 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 12:44:56,557 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:44:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1579860641, now seen corresponding path program 14 times [2021-08-21 12:44:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:56,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669000123] [2021-08-21 12:44:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:56,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:56,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:56,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669000123] [2021-08-21 12:44:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669000123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:56,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712470994] [2021-08-21 12:44:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:56,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:56,947 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:56,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:44:57,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:44:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:58,480 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:58,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:44:58,879 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:44:58,887 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 30 treesize of output 18 [2021-08-21 12:44:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712470994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:59,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:59,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:44:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835661427] [2021-08-21 12:44:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:44:59,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:44:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:59,227 INFO L87 Difference]: Start difference. First operand 4635 states and 13890 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:02,475 INFO L93 Difference]: Finished difference Result 5548 states and 16406 transitions. [2021-08-21 12:45:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:45:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:45:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:02,487 INFO L225 Difference]: With dead ends: 5548 [2021-08-21 12:45:02,487 INFO L226 Difference]: Without dead ends: 5404 [2021-08-21 12:45:02,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1898.1ms TimeCoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:45:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-08-21 12:45:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 4660. [2021-08-21 12:45:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4660 states, 4659 states have (on average 2.997638978321528) internal successors, (13966), 4659 states have internal predecessors, (13966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4660 states to 4660 states and 13966 transitions. [2021-08-21 12:45:02,593 INFO L78 Accepts]: Start accepts. Automaton has 4660 states and 13966 transitions. Word has length 37 [2021-08-21 12:45:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:02,593 INFO L470 AbstractCegarLoop]: Abstraction has 4660 states and 13966 transitions. [2021-08-21 12:45:02,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states and 13966 transitions. [2021-08-21 12:45:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:02,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:02,615 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:02,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:02,829 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 12:45:02,829 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1508235505, now seen corresponding path program 15 times [2021-08-21 12:45:02,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:02,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038354920] [2021-08-21 12:45:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:02,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038354920] [2021-08-21 12:45:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038354920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886081423] [2021-08-21 12:45:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:03,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:03,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:03,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:45:04,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:45:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:04,953 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:45:05,337 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:05,338 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 39 treesize of output 23 [2021-08-21 12:45:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:05,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886081423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:05,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:05,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:45:05,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744840035] [2021-08-21 12:45:05,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:45:05,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:45:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:45:05,563 INFO L87 Difference]: Start difference. First operand 4660 states and 13966 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:45:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:06,850 INFO L93 Difference]: Finished difference Result 5036 states and 14925 transitions. [2021-08-21 12:45:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:45:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:45:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:06,858 INFO L225 Difference]: With dead ends: 5036 [2021-08-21 12:45:06,858 INFO L226 Difference]: Without dead ends: 4972 [2021-08-21 12:45:06,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1298.2ms TimeCoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:45:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-08-21 12:45:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4675. [2021-08-21 12:45:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 2.9965768078733417) internal successors, (14006), 4674 states have internal predecessors, (14006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 14006 transitions. [2021-08-21 12:45:06,917 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 14006 transitions. Word has length 37 [2021-08-21 12:45:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 4675 states and 14006 transitions. [2021-08-21 12:45:06,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:45:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 14006 transitions. [2021-08-21 12:45:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:06,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:06,923 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:06,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:07,142 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 12:45:07,142 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1612415245, now seen corresponding path program 16 times [2021-08-21 12:45:07,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:07,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274587033] [2021-08-21 12:45:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:07,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:07,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274587033] [2021-08-21 12:45:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274587033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:07,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25292870] [2021-08-21 12:45:07,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:07,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:07,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:07,647 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:07,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:45:08,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:08,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:08,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:09,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:45:09,623 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:09,624 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 29 treesize of output 17 [2021-08-21 12:45:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:09,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25292870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:09,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:09,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-21 12:45:09,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293812184] [2021-08-21 12:45:09,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:45:09,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:45:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:45:09,963 INFO L87 Difference]: Start difference. First operand 4675 states and 14006 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:13,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:13,679 INFO L93 Difference]: Finished difference Result 8596 states and 25101 transitions. [2021-08-21 12:45:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:45:13,680 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:45:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:13,694 INFO L225 Difference]: With dead ends: 8596 [2021-08-21 12:45:13,694 INFO L226 Difference]: Without dead ends: 8377 [2021-08-21 12:45:13,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2920.5ms TimeCoverageRelationStatistics Valid=587, Invalid=5893, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 12:45:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-08-21 12:45:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 4918. [2021-08-21 12:45:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 2.9967459833231644) internal successors, (14735), 4917 states have internal predecessors, (14735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 14735 transitions. [2021-08-21 12:45:13,790 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 14735 transitions. Word has length 37 [2021-08-21 12:45:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:13,790 INFO L470 AbstractCegarLoop]: Abstraction has 4918 states and 14735 transitions. [2021-08-21 12:45:13,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 14735 transitions. [2021-08-21 12:45:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:13,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:13,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:13,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:14,017 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 12:45:14,017 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash 83890995, now seen corresponding path program 17 times [2021-08-21 12:45:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:14,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846715406] [2021-08-21 12:45:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:14,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:14,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:14,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846715406] [2021-08-21 12:45:14,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846715406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:14,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263108631] [2021-08-21 12:45:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:14,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:14,362 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:14,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:45:15,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:45:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:45:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:16,205 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:16,205 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 31 treesize of output 19 [2021-08-21 12:45:16,338 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:45:16,338 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 37 treesize of output 28 [2021-08-21 12:45:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:16,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263108631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:16,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:16,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-08-21 12:45:16,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945759034] [2021-08-21 12:45:16,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:45:16,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:45:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:45:16,682 INFO L87 Difference]: Start difference. First operand 4918 states and 14735 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 12:45:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:19,165 INFO L93 Difference]: Finished difference Result 5933 states and 17480 transitions. [2021-08-21 12:45:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:45:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 37 [2021-08-21 12:45:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:19,175 INFO L225 Difference]: With dead ends: 5933 [2021-08-21 12:45:19,175 INFO L226 Difference]: Without dead ends: 5782 [2021-08-21 12:45:19,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1437.4ms TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:45:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2021-08-21 12:45:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 5007. [2021-08-21 12:45:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 2.994406711945665) internal successors, (14990), 5006 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 14990 transitions. [2021-08-21 12:45:19,253 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 14990 transitions. Word has length 37 [2021-08-21 12:45:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:19,253 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 14990 transitions. [2021-08-21 12:45:19,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 12:45:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 14990 transitions. [2021-08-21 12:45:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:19,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:19,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:19,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:45:19,472 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 12:45:19,473 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2041176273, now seen corresponding path program 18 times [2021-08-21 12:45:19,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:19,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866932922] [2021-08-21 12:45:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:19,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:20,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:20,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866932922] [2021-08-21 12:45:20,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866932922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:20,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346234734] [2021-08-21 12:45:20,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:20,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:20,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:20,077 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:20,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:45:21,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:45:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:22,017 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:22,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:45:22,372 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:22,373 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 29 treesize of output 17 [2021-08-21 12:45:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346234734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:22,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:45:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091332185] [2021-08-21 12:45:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:45:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:45:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:45:22,615 INFO L87 Difference]: Start difference. First operand 5007 states and 14990 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:25,849 INFO L93 Difference]: Finished difference Result 7644 states and 22379 transitions. [2021-08-21 12:45:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:45:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:45:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:25,861 INFO L225 Difference]: With dead ends: 7644 [2021-08-21 12:45:25,861 INFO L226 Difference]: Without dead ends: 7504 [2021-08-21 12:45:25,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2550.9ms TimeCoverageRelationStatistics Valid=549, Invalid=5931, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 12:45:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7504 states. [2021-08-21 12:45:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7504 to 5085. [2021-08-21 12:45:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 2.9929189614476788) internal successors, (15216), 5084 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 15216 transitions. [2021-08-21 12:45:25,947 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 15216 transitions. Word has length 37 [2021-08-21 12:45:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:25,947 INFO L470 AbstractCegarLoop]: Abstraction has 5085 states and 15216 transitions. [2021-08-21 12:45:25,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 15216 transitions. [2021-08-21 12:45:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:25,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:25,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:25,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:26,168 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 12:45:26,169 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash 509427017, now seen corresponding path program 19 times [2021-08-21 12:45:26,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:26,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439442836] [2021-08-21 12:45:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:26,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:26,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:26,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439442836] [2021-08-21 12:45:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439442836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:26,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994649818] [2021-08-21 12:45:26,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:26,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:26,712 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:26,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:45:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:45:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:28,605 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:45:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 12:45:28,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:28,947 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 29 treesize of output 17 [2021-08-21 12:45:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:29,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994649818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:29,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:29,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:45:29,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009297638] [2021-08-21 12:45:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:45:29,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:45:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:45:29,274 INFO L87 Difference]: Start difference. First operand 5085 states and 15216 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:45:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:32,809 INFO L93 Difference]: Finished difference Result 8706 states and 25479 transitions. [2021-08-21 12:45:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:45:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:45:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:32,822 INFO L225 Difference]: With dead ends: 8706 [2021-08-21 12:45:32,822 INFO L226 Difference]: Without dead ends: 8487 [2021-08-21 12:45:32,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 3023.6ms TimeCoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 12:45:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8487 states. [2021-08-21 12:45:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8487 to 5078. [2021-08-21 12:45:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5078 states, 5077 states have (on average 2.9929091983454796) internal successors, (15195), 5077 states have internal predecessors, (15195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 15195 transitions. [2021-08-21 12:45:32,905 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 15195 transitions. Word has length 37 [2021-08-21 12:45:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:32,905 INFO L470 AbstractCegarLoop]: Abstraction has 5078 states and 15195 transitions. [2021-08-21 12:45:32,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:45:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 15195 transitions. [2021-08-21 12:45:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:32,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:32,912 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:32,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:33,132 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 12:45:33,132 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2089234039, now seen corresponding path program 20 times [2021-08-21 12:45:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:33,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558043458] [2021-08-21 12:45:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:33,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:33,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:33,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558043458] [2021-08-21 12:45:33,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558043458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:33,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625826566] [2021-08-21 12:45:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:33,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:33,655 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:33,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:45:35,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:35,554 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:35,554 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 27 treesize of output 15 [2021-08-21 12:45:35,891 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:35,891 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 29 treesize of output 17 [2021-08-21 12:45:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:36,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625826566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:36,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:36,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:45:36,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958132540] [2021-08-21 12:45:36,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:45:36,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:45:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:45:36,282 INFO L87 Difference]: Start difference. First operand 5078 states and 15195 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:39,365 INFO L93 Difference]: Finished difference Result 5877 states and 17361 transitions. [2021-08-21 12:45:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:45:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:45:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:39,375 INFO L225 Difference]: With dead ends: 5877 [2021-08-21 12:45:39,375 INFO L226 Difference]: Without dead ends: 5740 [2021-08-21 12:45:39,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1935.6ms TimeCoverageRelationStatistics Valid=206, Invalid=3100, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:45:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2021-08-21 12:45:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5088. [2021-08-21 12:45:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.9927265578926674) internal successors, (15224), 5087 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 15224 transitions. [2021-08-21 12:45:39,446 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 15224 transitions. Word has length 37 [2021-08-21 12:45:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 15224 transitions. [2021-08-21 12:45:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 15224 transitions. [2021-08-21 12:45:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:39,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:39,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:39,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 12:45:39,658 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 12:45:39,658 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash 25020101, now seen corresponding path program 21 times [2021-08-21 12:45:39,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:39,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291832739] [2021-08-21 12:45:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:39,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:40,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291832739] [2021-08-21 12:45:40,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291832739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249163769] [2021-08-21 12:45:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:40,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:40,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:40,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:45:41,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:45:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:42,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:42,143 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 27 treesize of output 15 [2021-08-21 12:45:42,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-08-21 12:45:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:42,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249163769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:42,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:42,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:45:42,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477406749] [2021-08-21 12:45:42,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:45:42,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:45:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:45:42,733 INFO L87 Difference]: Start difference. First operand 5088 states and 15224 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:45:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:44,104 INFO L93 Difference]: Finished difference Result 5543 states and 16378 transitions. [2021-08-21 12:45:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:45:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:45:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:44,115 INFO L225 Difference]: With dead ends: 5543 [2021-08-21 12:45:44,115 INFO L226 Difference]: Without dead ends: 5493 [2021-08-21 12:45:44,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1282.2ms TimeCoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:45:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2021-08-21 12:45:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5088. [2021-08-21 12:45:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.9927265578926674) internal successors, (15224), 5087 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 15224 transitions. [2021-08-21 12:45:44,195 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 15224 transitions. Word has length 37 [2021-08-21 12:45:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:44,195 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 15224 transitions. [2021-08-21 12:45:44,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:45:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 15224 transitions. [2021-08-21 12:45:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:44,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:44,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:44,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:44,421 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 12:45:44,421 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -525754279, now seen corresponding path program 22 times [2021-08-21 12:45:44,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:44,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562414842] [2021-08-21 12:45:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:44,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:44,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:44,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562414842] [2021-08-21 12:45:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562414842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:44,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200654500] [2021-08-21 12:45:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:44,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:44,953 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:44,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:45:46,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:45:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:47,074 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:45:47,074 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 31 treesize of output 15 [2021-08-21 12:45:47,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:47,426 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 29 treesize of output 17 [2021-08-21 12:45:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:47,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200654500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:47,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:47,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:45:47,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779897970] [2021-08-21 12:45:47,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:45:47,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:45:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:45:47,724 INFO L87 Difference]: Start difference. First operand 5088 states and 15224 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:45:51,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:51,658 INFO L93 Difference]: Finished difference Result 8871 states and 25962 transitions. [2021-08-21 12:45:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:45:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:45:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:51,675 INFO L225 Difference]: With dead ends: 8871 [2021-08-21 12:45:51,675 INFO L226 Difference]: Without dead ends: 8652 [2021-08-21 12:45:51,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3053.5ms TimeCoverageRelationStatistics Valid=604, Invalid=7586, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 12:45:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-08-21 12:45:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 5067. [2021-08-21 12:45:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 2.992696407422029) internal successors, (15161), 5066 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 15161 transitions. [2021-08-21 12:45:51,836 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 15161 transitions. Word has length 37 [2021-08-21 12:45:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,836 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 15161 transitions. [2021-08-21 12:45:51,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:45:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 15161 transitions. [2021-08-21 12:45:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:51,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:51,857 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:51,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:52,058 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 12:45:52,058 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1170551961, now seen corresponding path program 23 times [2021-08-21 12:45:52,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:52,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243030543] [2021-08-21 12:45:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:52,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:52,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:52,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243030543] [2021-08-21 12:45:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243030543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464596367] [2021-08-21 12:45:52,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:52,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:52,508 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:52,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:45:54,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:45:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:45:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:54,609 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:54,610 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 27 treesize of output 15 [2021-08-21 12:45:54,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:54,918 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 29 treesize of output 17 [2021-08-21 12:45:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:55,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464596367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:55,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:55,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-08-21 12:45:55,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089629449] [2021-08-21 12:45:55,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:45:55,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:45:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:45:55,174 INFO L87 Difference]: Start difference. First operand 5067 states and 15161 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:45:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:56,069 INFO L93 Difference]: Finished difference Result 5454 states and 16115 transitions. [2021-08-21 12:45:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:45:56,069 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 37 [2021-08-21 12:45:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:56,078 INFO L225 Difference]: With dead ends: 5454 [2021-08-21 12:45:56,078 INFO L226 Difference]: Without dead ends: 5343 [2021-08-21 12:45:56,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=151, Invalid=1919, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:45:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-08-21 12:45:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5067. [2021-08-21 12:45:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 2.992696407422029) internal successors, (15161), 5066 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 15161 transitions. [2021-08-21 12:45:56,155 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 15161 transitions. Word has length 37 [2021-08-21 12:45:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:56,155 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 15161 transitions. [2021-08-21 12:45:56,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:45:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 15161 transitions. [2021-08-21 12:45:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:45:56,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:56,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:56,183 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 12:45:56,382 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 12:45:56,383 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:45:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:56,383 INFO L82 PathProgramCache]: Analyzing trace with hash -687759509, now seen corresponding path program 24 times [2021-08-21 12:45:56,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:56,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716470435] [2021-08-21 12:45:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:56,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:56,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:56,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716470435] [2021-08-21 12:45:56,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716470435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:56,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097926098] [2021-08-21 12:45:56,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:56,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:56,823 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:56,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:45:58,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:45:58,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:45:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:59,076 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:59,076 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 27 treesize of output 15 [2021-08-21 12:45:59,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:45:59,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:45:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:59,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097926098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:59,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:59,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:45:59,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16786479] [2021-08-21 12:45:59,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:45:59,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:45:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:45:59,632 INFO L87 Difference]: Start difference. First operand 5067 states and 15161 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:03,472 INFO L93 Difference]: Finished difference Result 8673 states and 25446 transitions. [2021-08-21 12:46:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:46:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:03,487 INFO L225 Difference]: With dead ends: 8673 [2021-08-21 12:46:03,487 INFO L226 Difference]: Without dead ends: 8427 [2021-08-21 12:46:03,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 2575.0ms TimeCoverageRelationStatistics Valid=509, Invalid=6133, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:46:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-08-21 12:46:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 5020. [2021-08-21 12:46:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5020 states, 5019 states have (on average 2.9920302849173144) internal successors, (15017), 5019 states have internal predecessors, (15017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 15017 transitions. [2021-08-21 12:46:03,571 INFO L78 Accepts]: Start accepts. Automaton has 5020 states and 15017 transitions. Word has length 37 [2021-08-21 12:46:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:03,571 INFO L470 AbstractCegarLoop]: Abstraction has 5020 states and 15017 transitions. [2021-08-21 12:46:03,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5020 states and 15017 transitions. [2021-08-21 12:46:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:03,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:03,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:03,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:03,792 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 12:46:03,793 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -300799283, now seen corresponding path program 25 times [2021-08-21 12:46:03,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:03,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627872624] [2021-08-21 12:46:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:03,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:04,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:04,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627872624] [2021-08-21 12:46:04,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627872624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:04,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289313890] [2021-08-21 12:46:04,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:04,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:04,363 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:04,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:46:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:46:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:06,541 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:46:06,541 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 31 treesize of output 15 [2021-08-21 12:46:06,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:06,962 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 29 treesize of output 17 [2021-08-21 12:46:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289313890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:07,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:07,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:46:07,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035731371] [2021-08-21 12:46:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:46:07,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:46:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:46:07,293 INFO L87 Difference]: Start difference. First operand 5020 states and 15017 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:10,373 INFO L93 Difference]: Finished difference Result 7633 states and 22321 transitions. [2021-08-21 12:46:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:46:10,373 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:46:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:10,384 INFO L225 Difference]: With dead ends: 7633 [2021-08-21 12:46:10,385 INFO L226 Difference]: Without dead ends: 7414 [2021-08-21 12:46:10,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2788.3ms TimeCoverageRelationStatistics Valid=605, Invalid=6201, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 12:46:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-08-21 12:46:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 5184. [2021-08-21 12:46:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 5183 states have (on average 2.9922824618946557) internal successors, (15509), 5183 states have internal predecessors, (15509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 15509 transitions. [2021-08-21 12:46:10,457 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 15509 transitions. Word has length 37 [2021-08-21 12:46:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 15509 transitions. [2021-08-21 12:46:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 15509 transitions. [2021-08-21 12:46:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:10,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:10,464 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:10,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 12:46:10,684 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 12:46:10,685 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1395506957, now seen corresponding path program 26 times [2021-08-21 12:46:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:10,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608822161] [2021-08-21 12:46:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:10,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:11,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:11,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608822161] [2021-08-21 12:46:11,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608822161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:11,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056896776] [2021-08-21 12:46:11,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:11,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:11,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:11,032 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:11,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:46:12,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:46:12,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:13,166 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:46:13,417 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:13,418 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 29 treesize of output 17 [2021-08-21 12:46:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:13,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056896776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:13,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:13,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:46:13,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760642269] [2021-08-21 12:46:13,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:46:13,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:46:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:46:13,610 INFO L87 Difference]: Start difference. First operand 5184 states and 15509 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:46:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:15,037 INFO L93 Difference]: Finished difference Result 5504 states and 16309 transitions. [2021-08-21 12:46:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:46:15,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:46:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:15,047 INFO L225 Difference]: With dead ends: 5504 [2021-08-21 12:46:15,047 INFO L226 Difference]: Without dead ends: 5461 [2021-08-21 12:46:15,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:46:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-08-21 12:46:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 5201. [2021-08-21 12:46:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5201 states, 5200 states have (on average 2.9911538461538463) internal successors, (15554), 5200 states have internal predecessors, (15554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 15554 transitions. [2021-08-21 12:46:15,119 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 15554 transitions. Word has length 37 [2021-08-21 12:46:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:15,119 INFO L470 AbstractCegarLoop]: Abstraction has 5201 states and 15554 transitions. [2021-08-21 12:46:15,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:46:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 15554 transitions. [2021-08-21 12:46:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:15,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:15,126 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:15,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:15,346 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 12:46:15,346 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:15,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2045163289, now seen corresponding path program 27 times [2021-08-21 12:46:15,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:15,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833779889] [2021-08-21 12:46:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:15,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:15,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:15,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833779889] [2021-08-21 12:46:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833779889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:15,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730529553] [2021-08-21 12:46:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:15,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:15,865 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:46:17,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:46:17,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:46:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:18,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:46:18,600 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:18,600 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 29 treesize of output 17 [2021-08-21 12:46:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:18,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730529553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:18,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:18,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:46:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436088551] [2021-08-21 12:46:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:46:18,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:18,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:46:18,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:46:18,918 INFO L87 Difference]: Start difference. First operand 5201 states and 15554 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:22,230 INFO L93 Difference]: Finished difference Result 7790 states and 22777 transitions. [2021-08-21 12:46:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:46:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:46:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:22,244 INFO L225 Difference]: With dead ends: 7790 [2021-08-21 12:46:22,244 INFO L226 Difference]: Without dead ends: 7571 [2021-08-21 12:46:22,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2684.6ms TimeCoverageRelationStatistics Valid=561, Invalid=6081, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:46:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-08-21 12:46:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 5173. [2021-08-21 12:46:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 5172 states have (on average 2.991105955143078) internal successors, (15470), 5172 states have internal predecessors, (15470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 15470 transitions. [2021-08-21 12:46:22,328 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 15470 transitions. Word has length 37 [2021-08-21 12:46:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:22,328 INFO L470 AbstractCegarLoop]: Abstraction has 5173 states and 15470 transitions. [2021-08-21 12:46:22,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 15470 transitions. [2021-08-21 12:46:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:22,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:22,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:22,363 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 12:46:22,561 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 12:46:22,561 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash -348857049, now seen corresponding path program 28 times [2021-08-21 12:46:22,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:22,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952352928] [2021-08-21 12:46:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:22,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:23,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:23,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952352928] [2021-08-21 12:46:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952352928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:23,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709452503] [2021-08-21 12:46:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:23,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:23,083 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:23,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:46:25,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:46:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:25,571 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:46:25,571 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 31 treesize of output 15 [2021-08-21 12:46:25,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:25,955 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 29 treesize of output 17 [2021-08-21 12:46:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709452503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:26,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:26,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:46:26,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993076881] [2021-08-21 12:46:26,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:46:26,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:46:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:46:26,371 INFO L87 Difference]: Start difference. First operand 5173 states and 15470 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:29,239 INFO L93 Difference]: Finished difference Result 5910 states and 17477 transitions. [2021-08-21 12:46:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:46:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:29,248 INFO L225 Difference]: With dead ends: 5910 [2021-08-21 12:46:29,249 INFO L226 Difference]: Without dead ends: 5773 [2021-08-21 12:46:29,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2009.3ms TimeCoverageRelationStatistics Valid=202, Invalid=3104, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2021-08-21 12:46:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 5183. [2021-08-21 12:46:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9909301428020068) internal successors, (15499), 5182 states have internal predecessors, (15499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15499 transitions. [2021-08-21 12:46:29,313 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15499 transitions. Word has length 37 [2021-08-21 12:46:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:29,313 INFO L470 AbstractCegarLoop]: Abstraction has 5183 states and 15499 transitions. [2021-08-21 12:46:29,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15499 transitions. [2021-08-21 12:46:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:29,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:29,319 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:29,341 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 12:46:29,537 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 12:46:29,537 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1765397091, now seen corresponding path program 29 times [2021-08-21 12:46:29,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:29,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411593799] [2021-08-21 12:46:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:29,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:30,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:30,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411593799] [2021-08-21 12:46:30,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411593799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:30,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144149172] [2021-08-21 12:46:30,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:30,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:30,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:30,073 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:30,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:46:31,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:46:31,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:46:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:32,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:32,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:46:32,864 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-08-21 12:46:32,864 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 38 treesize of output 32 [2021-08-21 12:46:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:33,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144149172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:33,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:33,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:46:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960398583] [2021-08-21 12:46:33,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:46:33,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:46:33,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:46:33,237 INFO L87 Difference]: Start difference. First operand 5183 states and 15499 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:36,334 INFO L93 Difference]: Finished difference Result 5967 states and 17624 transitions. [2021-08-21 12:46:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:46:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:36,344 INFO L225 Difference]: With dead ends: 5967 [2021-08-21 12:46:36,344 INFO L226 Difference]: Without dead ends: 5823 [2021-08-21 12:46:36,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2085.7ms TimeCoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:46:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-08-21 12:46:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5180. [2021-08-21 12:46:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 5179 states have (on average 2.991117976443329) internal successors, (15491), 5179 states have internal predecessors, (15491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 15491 transitions. [2021-08-21 12:46:36,413 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 15491 transitions. Word has length 37 [2021-08-21 12:46:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:36,413 INFO L470 AbstractCegarLoop]: Abstraction has 5180 states and 15491 transitions. [2021-08-21 12:46:36,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 15491 transitions. [2021-08-21 12:46:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:36,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:36,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:36,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:36,641 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 12:46:36,642 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1214622711, now seen corresponding path program 30 times [2021-08-21 12:46:36,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:36,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485874189] [2021-08-21 12:46:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:36,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:37,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485874189] [2021-08-21 12:46:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485874189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635778216] [2021-08-21 12:46:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:37,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:37,129 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:37,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:46:39,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:46:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:46:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:39,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:39,841 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 27 treesize of output 15 [2021-08-21 12:46:40,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:40,272 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 29 treesize of output 17 [2021-08-21 12:46:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635778216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:40,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:40,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:46:40,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505170120] [2021-08-21 12:46:40,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:46:40,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:46:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:46:40,486 INFO L87 Difference]: Start difference. First operand 5180 states and 15491 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:43,467 INFO L93 Difference]: Finished difference Result 7267 states and 21249 transitions. [2021-08-21 12:46:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:46:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:43,478 INFO L225 Difference]: With dead ends: 7267 [2021-08-21 12:46:43,478 INFO L226 Difference]: Without dead ends: 7113 [2021-08-21 12:46:43,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2339.5ms TimeCoverageRelationStatistics Valid=474, Invalid=5532, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 12:46:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-08-21 12:46:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 5159. [2021-08-21 12:46:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.9910818146568436) internal successors, (15428), 5158 states have internal predecessors, (15428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15428 transitions. [2021-08-21 12:46:43,556 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15428 transitions. Word has length 37 [2021-08-21 12:46:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:43,556 INFO L470 AbstractCegarLoop]: Abstraction has 5159 states and 15428 transitions. [2021-08-21 12:46:43,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15428 transitions. [2021-08-21 12:46:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:43,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:43,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:43,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:43,776 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 12:46:43,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1052617481, now seen corresponding path program 31 times [2021-08-21 12:46:43,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:43,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127814604] [2021-08-21 12:46:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:43,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127814604] [2021-08-21 12:46:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127814604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832032513] [2021-08-21 12:46:44,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:44,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:44,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:44,280 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:44,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:46:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:46:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:47,052 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:46:47,052 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 29 treesize of output 13 [2021-08-21 12:46:47,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:47,424 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 29 treesize of output 17 [2021-08-21 12:46:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832032513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:47,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:47,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:46:47,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084285545] [2021-08-21 12:46:47,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:46:47,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:46:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:46:47,747 INFO L87 Difference]: Start difference. First operand 5159 states and 15428 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:50,851 INFO L93 Difference]: Finished difference Result 8233 states and 24200 transitions. [2021-08-21 12:46:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:46:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:46:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:50,863 INFO L225 Difference]: With dead ends: 8233 [2021-08-21 12:46:50,864 INFO L226 Difference]: Without dead ends: 7990 [2021-08-21 12:46:50,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2435.0ms TimeCoverageRelationStatistics Valid=470, Invalid=5850, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 12:46:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-08-21 12:46:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5145. [2021-08-21 12:46:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5145 states, 5144 states have (on average 2.9910575427682735) internal successors, (15386), 5144 states have internal predecessors, (15386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 15386 transitions. [2021-08-21 12:46:50,943 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 15386 transitions. Word has length 37 [2021-08-21 12:46:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:50,943 INFO L470 AbstractCegarLoop]: Abstraction has 5145 states and 15386 transitions. [2021-08-21 12:46:50,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:46:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 15386 transitions. [2021-08-21 12:46:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:50,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:50,949 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:50,974 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 12:46:51,170 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 12:46:51,171 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1546043575, now seen corresponding path program 32 times [2021-08-21 12:46:51,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:51,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032714698] [2021-08-21 12:46:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:51,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:51,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:51,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032714698] [2021-08-21 12:46:51,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032714698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:51,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239643271] [2021-08-21 12:46:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:51,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:51,631 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:51,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:46:53,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:53,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:53,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:46:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:54,416 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:54,417 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 27 treesize of output 15 [2021-08-21 12:46:54,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:46:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:54,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239643271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:54,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:54,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:46:54,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257632557] [2021-08-21 12:46:54,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:46:54,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:46:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:46:54,977 INFO L87 Difference]: Start difference. First operand 5145 states and 15386 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:46:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:56,124 INFO L93 Difference]: Finished difference Result 5402 states and 16038 transitions. [2021-08-21 12:46:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:46:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:46:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:56,137 INFO L225 Difference]: With dead ends: 5402 [2021-08-21 12:46:56,137 INFO L226 Difference]: Without dead ends: 5338 [2021-08-21 12:46:56,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1185.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:46:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-08-21 12:46:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 5145. [2021-08-21 12:46:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5145 states, 5144 states have (on average 2.9910575427682735) internal successors, (15386), 5144 states have internal predecessors, (15386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 15386 transitions. [2021-08-21 12:46:56,196 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 15386 transitions. Word has length 37 [2021-08-21 12:46:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 5145 states and 15386 transitions. [2021-08-21 12:46:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:46:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 15386 transitions. [2021-08-21 12:46:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:56,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:56,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:56,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:56,421 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 12:46:56,421 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -80374157, now seen corresponding path program 33 times [2021-08-21 12:46:56,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:56,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361727026] [2021-08-21 12:46:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:56,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:56,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:56,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361727026] [2021-08-21 12:46:56,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361727026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:56,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966911532] [2021-08-21 12:46:56,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:56,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:56,928 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:56,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:46:59,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:46:59,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:46:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:59,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:46:59,660 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 29 treesize of output 17 [2021-08-21 12:47:00,256 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 12:47:00,257 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 45 treesize of output 38 [2021-08-21 12:47:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966911532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:00,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:47:00,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942447016] [2021-08-21 12:47:00,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:47:00,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:47:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1391, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:47:00,652 INFO L87 Difference]: Start difference. First operand 5145 states and 15386 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:47:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:04,650 INFO L93 Difference]: Finished difference Result 9041 states and 26928 transitions. [2021-08-21 12:47:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:47:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:47:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:04,666 INFO L225 Difference]: With dead ends: 9041 [2021-08-21 12:47:04,666 INFO L226 Difference]: Without dead ends: 8918 [2021-08-21 12:47:04,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3009.4ms TimeCoverageRelationStatistics Valid=545, Invalid=6765, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 12:47:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2021-08-21 12:47:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 5638. [2021-08-21 12:47:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 3.008869966294128) internal successors, (16961), 5637 states have internal predecessors, (16961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 16961 transitions. [2021-08-21 12:47:04,753 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 16961 transitions. Word has length 37 [2021-08-21 12:47:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:04,754 INFO L470 AbstractCegarLoop]: Abstraction has 5638 states and 16961 transitions. [2021-08-21 12:47:04,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:47:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 16961 transitions. [2021-08-21 12:47:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:04,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:04,807 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:04,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:05,022 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 12:47:05,022 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1615932083, now seen corresponding path program 34 times [2021-08-21 12:47:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:05,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705187676] [2021-08-21 12:47:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:05,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:05,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:05,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705187676] [2021-08-21 12:47:05,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705187676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:05,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971046674] [2021-08-21 12:47:05,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:05,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:05,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:05,514 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:05,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:47:07,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:07,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:47:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:08,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:08,458 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 27 treesize of output 15 [2021-08-21 12:47:08,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:08,826 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 29 treesize of output 17 [2021-08-21 12:47:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971046674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:09,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:09,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:47:09,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629632863] [2021-08-21 12:47:09,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:47:09,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:47:09,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:47:09,183 INFO L87 Difference]: Start difference. First operand 5638 states and 16961 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:11,749 INFO L93 Difference]: Finished difference Result 6553 states and 19561 transitions. [2021-08-21 12:47:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:47:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:47:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:11,760 INFO L225 Difference]: With dead ends: 6553 [2021-08-21 12:47:11,760 INFO L226 Difference]: Without dead ends: 6501 [2021-08-21 12:47:11,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1668.3ms TimeCoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:47:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-08-21 12:47:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 5699. [2021-08-21 12:47:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 3.0077220077220077) internal successors, (17138), 5698 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 17138 transitions. [2021-08-21 12:47:11,830 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 17138 transitions. Word has length 37 [2021-08-21 12:47:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:11,831 INFO L470 AbstractCegarLoop]: Abstraction has 5699 states and 17138 transitions. [2021-08-21 12:47:11,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 17138 transitions. [2021-08-21 12:47:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:11,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:11,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:11,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:12,052 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 12:47:12,053 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash -564781073, now seen corresponding path program 35 times [2021-08-21 12:47:12,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:12,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610493075] [2021-08-21 12:47:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:12,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:12,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610493075] [2021-08-21 12:47:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610493075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964315171] [2021-08-21 12:47:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:12,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:12,404 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:12,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:47:14,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:47:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:14,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:47:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:15,316 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:15,316 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 27 treesize of output 15 [2021-08-21 12:47:15,937 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:47:15,937 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 47 treesize of output 34 [2021-08-21 12:47:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964315171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:16,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:16,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-08-21 12:47:16,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324356011] [2021-08-21 12:47:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:47:16,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:47:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:47:16,209 INFO L87 Difference]: Start difference. First operand 5699 states and 17138 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:47:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:17,591 INFO L93 Difference]: Finished difference Result 6140 states and 18244 transitions. [2021-08-21 12:47:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:47:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 37 [2021-08-21 12:47:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:17,601 INFO L225 Difference]: With dead ends: 6140 [2021-08-21 12:47:17,602 INFO L226 Difference]: Without dead ends: 6104 [2021-08-21 12:47:17,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1455.9ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:47:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-08-21 12:47:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5765. [2021-08-21 12:47:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 5764 states have (on average 3.001734906315059) internal successors, (17302), 5764 states have internal predecessors, (17302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 17302 transitions. [2021-08-21 12:47:17,676 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 17302 transitions. Word has length 37 [2021-08-21 12:47:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:17,676 INFO L470 AbstractCegarLoop]: Abstraction has 5765 states and 17302 transitions. [2021-08-21 12:47:17,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:47:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 17302 transitions. [2021-08-21 12:47:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:17,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:17,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:17,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:17,896 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 12:47:17,896 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -411405653, now seen corresponding path program 36 times [2021-08-21 12:47:17,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:17,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634576931] [2021-08-21 12:47:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:17,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:18,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:18,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634576931] [2021-08-21 12:47:18,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634576931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:18,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968916636] [2021-08-21 12:47:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:18,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:18,437 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:18,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:47:20,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:47:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:47:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:21,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:21,604 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 31 treesize of output 19 [2021-08-21 12:47:21,707 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:21,708 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 36 treesize of output 20 [2021-08-21 12:47:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968916636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:22,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-08-21 12:47:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066962807] [2021-08-21 12:47:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:47:22,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:47:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:47:22,014 INFO L87 Difference]: Start difference. First operand 5765 states and 17302 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 12:47:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:23,436 INFO L93 Difference]: Finished difference Result 7397 states and 21953 transitions. [2021-08-21 12:47:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:47:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 37 [2021-08-21 12:47:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:23,448 INFO L225 Difference]: With dead ends: 7397 [2021-08-21 12:47:23,448 INFO L226 Difference]: Without dead ends: 7133 [2021-08-21 12:47:23,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1354.9ms TimeCoverageRelationStatistics Valid=196, Invalid=2560, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:47:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7133 states. [2021-08-21 12:47:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7133 to 5974. [2021-08-21 12:47:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5974 states, 5973 states have (on average 2.9963167587476978) internal successors, (17897), 5973 states have internal predecessors, (17897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5974 states to 5974 states and 17897 transitions. [2021-08-21 12:47:23,524 INFO L78 Accepts]: Start accepts. Automaton has 5974 states and 17897 transitions. Word has length 37 [2021-08-21 12:47:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:23,524 INFO L470 AbstractCegarLoop]: Abstraction has 5974 states and 17897 transitions. [2021-08-21 12:47:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 12:47:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5974 states and 17897 transitions. [2021-08-21 12:47:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:23,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:23,531 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:23,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:23,754 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 12:47:23,754 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1102743625, now seen corresponding path program 37 times [2021-08-21 12:47:23,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:23,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332289715] [2021-08-21 12:47:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:23,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:24,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:24,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332289715] [2021-08-21 12:47:24,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332289715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:24,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163941801] [2021-08-21 12:47:24,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:24,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:24,160 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:24,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:47:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:47:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:27,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:27,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:47:27,482 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:27,483 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 29 treesize of output 17 [2021-08-21 12:47:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163941801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:27,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 12:47:27,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064717725] [2021-08-21 12:47:27,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:47:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:47:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:47:27,808 INFO L87 Difference]: Start difference. First operand 5974 states and 17897 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:47:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:30,100 INFO L93 Difference]: Finished difference Result 7394 states and 21901 transitions. [2021-08-21 12:47:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:47:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:47:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:30,113 INFO L225 Difference]: With dead ends: 7394 [2021-08-21 12:47:30,113 INFO L226 Difference]: Without dead ends: 7139 [2021-08-21 12:47:30,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1709.6ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:47:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2021-08-21 12:47:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6082. [2021-08-21 12:47:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6082 states, 6081 states have (on average 2.995888834073343) internal successors, (18218), 6081 states have internal predecessors, (18218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 18218 transitions. [2021-08-21 12:47:30,198 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 18218 transitions. Word has length 37 [2021-08-21 12:47:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:30,198 INFO L470 AbstractCegarLoop]: Abstraction has 6082 states and 18218 transitions. [2021-08-21 12:47:30,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:47:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 18218 transitions. [2021-08-21 12:47:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:30,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:30,206 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:30,231 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 12:47:30,420 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 12:47:30,421 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 673982597, now seen corresponding path program 38 times [2021-08-21 12:47:30,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:30,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548338466] [2021-08-21 12:47:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:30,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:31,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548338466] [2021-08-21 12:47:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548338466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872384632] [2021-08-21 12:47:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:31,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:31,049 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:31,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:47:33,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:33,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:47:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:34,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:34,282 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 27 treesize of output 15 [2021-08-21 12:47:34,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:34,587 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 29 treesize of output 17 [2021-08-21 12:47:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:34,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872384632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:34,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:34,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:47:34,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563959895] [2021-08-21 12:47:34,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:47:34,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:47:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:47:34,916 INFO L87 Difference]: Start difference. First operand 6082 states and 18218 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:37,610 INFO L93 Difference]: Finished difference Result 7356 states and 21847 transitions. [2021-08-21 12:47:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:47:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:47:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:37,622 INFO L225 Difference]: With dead ends: 7356 [2021-08-21 12:47:37,622 INFO L226 Difference]: Without dead ends: 7166 [2021-08-21 12:47:37,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1969.6ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:47:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7166 states. [2021-08-21 12:47:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7166 to 6145. [2021-08-21 12:47:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6145 states, 6144 states have (on average 2.9954427083333335) internal successors, (18404), 6144 states have internal predecessors, (18404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6145 states to 6145 states and 18404 transitions. [2021-08-21 12:47:37,698 INFO L78 Accepts]: Start accepts. Automaton has 6145 states and 18404 transitions. Word has length 37 [2021-08-21 12:47:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 6145 states and 18404 transitions. [2021-08-21 12:47:37,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6145 states and 18404 transitions. [2021-08-21 12:47:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:37,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:37,706 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:37,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 12:47:37,908 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 12:47:37,908 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:37,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1070381409, now seen corresponding path program 39 times [2021-08-21 12:47:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:37,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132129915] [2021-08-21 12:47:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:37,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:38,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:38,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132129915] [2021-08-21 12:47:38,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132129915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:38,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065376375] [2021-08-21 12:47:38,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:38,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:38,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:38,382 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:47:41,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:47:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:47:41,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:41,567 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:41,568 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 27 treesize of output 15 [2021-08-21 12:47:41,791 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:41,791 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 29 treesize of output 17 [2021-08-21 12:47:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:42,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065376375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:42,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:42,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:47:42,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347556593] [2021-08-21 12:47:42,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:47:42,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:47:42,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:47:42,022 INFO L87 Difference]: Start difference. First operand 6145 states and 18404 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:44,036 INFO L93 Difference]: Finished difference Result 7548 states and 22437 transitions. [2021-08-21 12:47:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:47:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:47:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:44,047 INFO L225 Difference]: With dead ends: 7548 [2021-08-21 12:47:44,048 INFO L226 Difference]: Without dead ends: 7361 [2021-08-21 12:47:44,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1522.6ms TimeCoverageRelationStatistics Valid=232, Invalid=3428, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:47:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2021-08-21 12:47:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 6130. [2021-08-21 12:47:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 2.994615761135585) internal successors, (18354), 6129 states have internal predecessors, (18354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 18354 transitions. [2021-08-21 12:47:44,131 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 18354 transitions. Word has length 37 [2021-08-21 12:47:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:44,131 INFO L470 AbstractCegarLoop]: Abstraction has 6130 states and 18354 transitions. [2021-08-21 12:47:44,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 18354 transitions. [2021-08-21 12:47:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:44,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:44,139 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:44,166 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 12:47:44,352 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 12:47:44,353 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1043872731, now seen corresponding path program 40 times [2021-08-21 12:47:44,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:44,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873642652] [2021-08-21 12:47:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:44,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:44,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:44,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873642652] [2021-08-21 12:47:44,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873642652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:44,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835441433] [2021-08-21 12:47:44,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:44,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:44,794 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:44,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:47:47,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:47:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:48,301 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:48,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:47:48,717 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:48,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 12:47:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:48,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835441433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:48,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:48,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:47:49,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221184132] [2021-08-21 12:47:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:47:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:47:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:47:49,000 INFO L87 Difference]: Start difference. First operand 6130 states and 18354 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:51,201 INFO L93 Difference]: Finished difference Result 7432 states and 22078 transitions. [2021-08-21 12:47:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:47:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:47:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:51,214 INFO L225 Difference]: With dead ends: 7432 [2021-08-21 12:47:51,214 INFO L226 Difference]: Without dead ends: 7232 [2021-08-21 12:47:51,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1800.5ms TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:47:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-08-21 12:47:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6160. [2021-08-21 12:47:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 2.9957785354765383) internal successors, (18451), 6159 states have internal predecessors, (18451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 18451 transitions. [2021-08-21 12:47:51,306 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 18451 transitions. Word has length 37 [2021-08-21 12:47:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:51,306 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 18451 transitions. [2021-08-21 12:47:51,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 18451 transitions. [2021-08-21 12:47:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:51,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:51,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:51,341 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 12:47:51,528 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 12:47:51,529 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2105562705, now seen corresponding path program 41 times [2021-08-21 12:47:51,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:51,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711865001] [2021-08-21 12:47:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:51,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:51,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:51,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711865001] [2021-08-21 12:47:51,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711865001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:51,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818995089] [2021-08-21 12:47:51,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:51,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:51,892 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:51,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:47:54,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:47:54,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:47:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:55,336 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:47:55,336 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 26 [2021-08-21 12:47:55,615 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:55,615 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 39 treesize of output 23 [2021-08-21 12:47:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:55,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818995089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:55,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:55,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:47:55,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047839137] [2021-08-21 12:47:55,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:47:55,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:47:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:47:55,987 INFO L87 Difference]: Start difference. First operand 6160 states and 18451 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:58,897 INFO L93 Difference]: Finished difference Result 7746 states and 23050 transitions. [2021-08-21 12:47:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:47:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:47:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:58,910 INFO L225 Difference]: With dead ends: 7746 [2021-08-21 12:47:58,910 INFO L226 Difference]: Without dead ends: 7559 [2021-08-21 12:47:58,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1911.4ms TimeCoverageRelationStatistics Valid=250, Invalid=3656, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:47:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2021-08-21 12:47:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 6166. [2021-08-21 12:47:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6166 states, 6165 states have (on average 2.994971613949716) internal successors, (18464), 6165 states have internal predecessors, (18464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 18464 transitions. [2021-08-21 12:47:58,998 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 18464 transitions. Word has length 37 [2021-08-21 12:47:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:58,998 INFO L470 AbstractCegarLoop]: Abstraction has 6166 states and 18464 transitions. [2021-08-21 12:47:58,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 18464 transitions. [2021-08-21 12:47:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:59,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:59,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:59,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:59,220 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 12:47:59,221 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 8691435, now seen corresponding path program 42 times [2021-08-21 12:47:59,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:59,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866812030] [2021-08-21 12:47:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:59,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:59,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:59,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866812030] [2021-08-21 12:47:59,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866812030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:59,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363214325] [2021-08-21 12:47:59,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:59,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:59,822 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:48:02,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:48:02,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:48:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:03,264 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:03,264 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 31 treesize of output 19 [2021-08-21 12:48:03,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:03,490 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 37 treesize of output 21 [2021-08-21 12:48:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:03,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363214325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:03,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:03,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:48:03,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866515489] [2021-08-21 12:48:03,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:48:03,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:48:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:48:03,727 INFO L87 Difference]: Start difference. First operand 6166 states and 18464 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:48:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:05,360 INFO L93 Difference]: Finished difference Result 7712 states and 22893 transitions. [2021-08-21 12:48:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:48:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:48:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:05,372 INFO L225 Difference]: With dead ends: 7712 [2021-08-21 12:48:05,372 INFO L226 Difference]: Without dead ends: 7496 [2021-08-21 12:48:05,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1367.4ms TimeCoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:48:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2021-08-21 12:48:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 6169. [2021-08-21 12:48:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6168 states have (on average 2.994649805447471) internal successors, (18471), 6168 states have internal predecessors, (18471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 18471 transitions. [2021-08-21 12:48:05,466 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 18471 transitions. Word has length 37 [2021-08-21 12:48:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 18471 transitions. [2021-08-21 12:48:05,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:48:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 18471 transitions. [2021-08-21 12:48:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:05,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:05,475 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:05,501 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 12:48:05,701 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 12:48:05,701 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2027399361, now seen corresponding path program 43 times [2021-08-21 12:48:05,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:05,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372565041] [2021-08-21 12:48:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:05,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:06,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:06,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372565041] [2021-08-21 12:48:06,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372565041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:06,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951808279] [2021-08-21 12:48:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:06,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:06,116 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:06,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:48:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:09,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:09,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:09,769 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 27 treesize of output 15 [2021-08-21 12:48:10,169 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:10,170 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 29 treesize of output 17 [2021-08-21 12:48:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:10,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951808279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:10,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:10,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:10,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686239614] [2021-08-21 12:48:10,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:10,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:10,532 INFO L87 Difference]: Start difference. First operand 6169 states and 18471 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:13,516 INFO L93 Difference]: Finished difference Result 7754 states and 23057 transitions. [2021-08-21 12:48:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:48:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:13,528 INFO L225 Difference]: With dead ends: 7754 [2021-08-21 12:48:13,528 INFO L226 Difference]: Without dead ends: 7522 [2021-08-21 12:48:13,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2024.7ms TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:48:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2021-08-21 12:48:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 6196. [2021-08-21 12:48:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 2.993381759483454) internal successors, (18544), 6195 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 18544 transitions. [2021-08-21 12:48:13,621 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 18544 transitions. Word has length 37 [2021-08-21 12:48:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:13,621 INFO L470 AbstractCegarLoop]: Abstraction has 6196 states and 18544 transitions. [2021-08-21 12:48:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 18544 transitions. [2021-08-21 12:48:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:13,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:13,629 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:13,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:48:13,848 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 12:48:13,849 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -153313795, now seen corresponding path program 44 times [2021-08-21 12:48:13,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:13,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810924689] [2021-08-21 12:48:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:13,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:14,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:14,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810924689] [2021-08-21 12:48:14,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810924689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:14,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166615536] [2021-08-21 12:48:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:14,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:14,191 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:14,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:48:17,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:17,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:17,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:48:18,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:18,139 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 30 treesize of output 18 [2021-08-21 12:48:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166615536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:18,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:18,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:18,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128012980] [2021-08-21 12:48:18,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:18,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:18,384 INFO L87 Difference]: Start difference. First operand 6196 states and 18544 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:20,928 INFO L93 Difference]: Finished difference Result 7812 states and 23269 transitions. [2021-08-21 12:48:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:48:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:20,940 INFO L225 Difference]: With dead ends: 7812 [2021-08-21 12:48:20,940 INFO L226 Difference]: Without dead ends: 7615 [2021-08-21 12:48:20,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1705.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:48:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7615 states. [2021-08-21 12:48:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7615 to 6229. [2021-08-21 12:48:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6229 states, 6228 states have (on average 2.993898522800257) internal successors, (18646), 6228 states have internal predecessors, (18646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6229 states to 6229 states and 18646 transitions. [2021-08-21 12:48:21,022 INFO L78 Accepts]: Start accepts. Automaton has 6229 states and 18646 transitions. Word has length 37 [2021-08-21 12:48:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:21,022 INFO L470 AbstractCegarLoop]: Abstraction has 6229 states and 18646 transitions. [2021-08-21 12:48:21,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 6229 states and 18646 transitions. [2021-08-21 12:48:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:21,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:21,031 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:21,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:48:21,249 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 12:48:21,249 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:21,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1360184945, now seen corresponding path program 45 times [2021-08-21 12:48:21,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:21,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22060119] [2021-08-21 12:48:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:21,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:21,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:21,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22060119] [2021-08-21 12:48:21,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22060119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:21,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337849577] [2021-08-21 12:48:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:21,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:21,688 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:48:24,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:48:24,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:25,554 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:25,555 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 27 treesize of output 15 [2021-08-21 12:48:25,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:25,933 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 30 treesize of output 18 [2021-08-21 12:48:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:26,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337849577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:26,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:26,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:26,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999821147] [2021-08-21 12:48:26,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:26,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:26,225 INFO L87 Difference]: Start difference. First operand 6229 states and 18646 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:28,785 INFO L93 Difference]: Finished difference Result 7906 states and 23566 transitions. [2021-08-21 12:48:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:48:28,785 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:28,799 INFO L225 Difference]: With dead ends: 7906 [2021-08-21 12:48:28,799 INFO L226 Difference]: Without dead ends: 7678 [2021-08-21 12:48:28,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1819.0ms TimeCoverageRelationStatistics Valid=222, Invalid=3084, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:48:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-08-21 12:48:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 6208. [2021-08-21 12:48:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6208 states, 6207 states have (on average 2.997905590462381) internal successors, (18608), 6207 states have internal predecessors, (18608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 18608 transitions. [2021-08-21 12:48:28,888 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 18608 transitions. Word has length 37 [2021-08-21 12:48:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:28,888 INFO L470 AbstractCegarLoop]: Abstraction has 6208 states and 18608 transitions. [2021-08-21 12:48:28,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 18608 transitions. [2021-08-21 12:48:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:28,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:28,896 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:28,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:29,108 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 12:48:29,109 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1510437841, now seen corresponding path program 46 times [2021-08-21 12:48:29,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:29,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112678170] [2021-08-21 12:48:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:29,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:29,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:29,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112678170] [2021-08-21 12:48:29,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112678170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:29,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195691547] [2021-08-21 12:48:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:29,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:29,827 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:29,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:48:32,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:33,410 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:33,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:48:33,512 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:33,512 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 29 treesize of output 17 [2021-08-21 12:48:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:33,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195691547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:33,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:33,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-08-21 12:48:33,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758933199] [2021-08-21 12:48:33,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:48:33,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:48:33,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:48:33,805 INFO L87 Difference]: Start difference. First operand 6208 states and 18608 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:48:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:36,009 INFO L93 Difference]: Finished difference Result 7508 states and 22250 transitions. [2021-08-21 12:48:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:48:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 37 [2021-08-21 12:48:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:36,021 INFO L225 Difference]: With dead ends: 7508 [2021-08-21 12:48:36,021 INFO L226 Difference]: Without dead ends: 7253 [2021-08-21 12:48:36,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1866.2ms TimeCoverageRelationStatistics Valid=214, Invalid=2866, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:48:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2021-08-21 12:48:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 6103. [2021-08-21 12:48:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.999836119305146) internal successors, (18305), 6102 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 18305 transitions. [2021-08-21 12:48:36,118 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 18305 transitions. Word has length 37 [2021-08-21 12:48:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:36,118 INFO L470 AbstractCegarLoop]: Abstraction has 6103 states and 18305 transitions. [2021-08-21 12:48:36,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:48:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 18305 transitions. [2021-08-21 12:48:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:36,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:36,126 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:36,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:36,340 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 12:48:36,341 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1081676813, now seen corresponding path program 47 times [2021-08-21 12:48:36,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:36,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219831940] [2021-08-21 12:48:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:36,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:36,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:36,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219831940] [2021-08-21 12:48:36,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219831940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:36,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760472592] [2021-08-21 12:48:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:36,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:36,715 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:36,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:48:40,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:48:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:48:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:40,859 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:48:40,859 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 26 [2021-08-21 12:48:41,186 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:41,186 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 36 treesize of output 20 [2021-08-21 12:48:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:41,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760472592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:41,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:41,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:41,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637020931] [2021-08-21 12:48:41,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:41,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:41,570 INFO L87 Difference]: Start difference. First operand 6103 states and 18305 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:44,082 INFO L93 Difference]: Finished difference Result 7439 states and 22078 transitions. [2021-08-21 12:48:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:48:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:44,093 INFO L225 Difference]: With dead ends: 7439 [2021-08-21 12:48:44,093 INFO L226 Difference]: Without dead ends: 7211 [2021-08-21 12:48:44,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1951.0ms TimeCoverageRelationStatistics Valid=226, Invalid=3196, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:48:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2021-08-21 12:48:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 6160. [2021-08-21 12:48:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 2.9996752719597337) internal successors, (18475), 6159 states have internal predecessors, (18475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 18475 transitions. [2021-08-21 12:48:44,183 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 18475 transitions. Word has length 37 [2021-08-21 12:48:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:44,183 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 18475 transitions. [2021-08-21 12:48:44,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 18475 transitions. [2021-08-21 12:48:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:44,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:44,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:44,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:44,412 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 12:48:44,413 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1859873719, now seen corresponding path program 48 times [2021-08-21 12:48:44,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:44,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575560401] [2021-08-21 12:48:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:44,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:44,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:44,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575560401] [2021-08-21 12:48:44,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575560401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:44,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781836078] [2021-08-21 12:48:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:44,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:44,847 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:44,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:48:48,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:48:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:48:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:48,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:48,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:48:48,880 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:48,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:48:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781836078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:49,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:49,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:49,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560069181] [2021-08-21 12:48:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:49,224 INFO L87 Difference]: Start difference. First operand 6160 states and 18475 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,857 INFO L93 Difference]: Finished difference Result 7791 states and 23166 transitions. [2021-08-21 12:48:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:48:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,872 INFO L225 Difference]: With dead ends: 7791 [2021-08-21 12:48:51,872 INFO L226 Difference]: Without dead ends: 7559 [2021-08-21 12:48:51,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1826.8ms TimeCoverageRelationStatistics Valid=246, Invalid=3414, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:48:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2021-08-21 12:48:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 6187. [2021-08-21 12:48:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 2.998383446492079) internal successors, (18548), 6186 states have internal predecessors, (18548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 18548 transitions. [2021-08-21 12:48:51,970 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 18548 transitions. Word has length 37 [2021-08-21 12:48:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 6187 states and 18548 transitions. [2021-08-21 12:48:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 18548 transitions. [2021-08-21 12:48:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:51,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,978 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:52,010 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 12:48:52,204 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 12:48:52,205 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 254380421, now seen corresponding path program 49 times [2021-08-21 12:48:52,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:52,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975323758] [2021-08-21 12:48:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:52,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:52,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:52,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975323758] [2021-08-21 12:48:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975323758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:52,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657034845] [2021-08-21 12:48:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:52,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:52,716 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:48:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:56,796 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:56,796 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 27 treesize of output 15 [2021-08-21 12:48:57,145 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:57,145 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 30 treesize of output 18 [2021-08-21 12:48:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:57,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657034845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:57,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:48:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127354080] [2021-08-21 12:48:57,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:48:57,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:48:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:48:57,404 INFO L87 Difference]: Start difference. First operand 6187 states and 18548 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:00,012 INFO L93 Difference]: Finished difference Result 7849 states and 23378 transitions. [2021-08-21 12:49:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:49:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:00,025 INFO L225 Difference]: With dead ends: 7849 [2021-08-21 12:49:00,025 INFO L226 Difference]: Without dead ends: 7652 [2021-08-21 12:49:00,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1935.9ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:49:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7652 states. [2021-08-21 12:49:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7652 to 6202. [2021-08-21 12:49:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6202 states, 6201 states have (on average 2.9987098855023384) internal successors, (18595), 6201 states have internal predecessors, (18595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6202 states to 6202 states and 18595 transitions. [2021-08-21 12:49:00,116 INFO L78 Accepts]: Start accepts. Automaton has 6202 states and 18595 transitions. Word has length 37 [2021-08-21 12:49:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:00,116 INFO L470 AbstractCegarLoop]: Abstraction has 6202 states and 18595 transitions. [2021-08-21 12:49:00,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6202 states and 18595 transitions. [2021-08-21 12:49:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:00,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:00,124 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:00,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:00,338 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 12:49:00,338 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash -952490729, now seen corresponding path program 50 times [2021-08-21 12:49:00,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:00,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365483291] [2021-08-21 12:49:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:00,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:00,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:00,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365483291] [2021-08-21 12:49:00,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365483291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:00,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531569938] [2021-08-21 12:49:00,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:00,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:00,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:00,780 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:00,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:49:04,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:04,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:04,881 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:04,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:49:05,213 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:05,213 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 30 treesize of output 18 [2021-08-21 12:49:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:05,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531569938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:05,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:05,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:05,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255734510] [2021-08-21 12:49:05,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:05,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:05,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:05,474 INFO L87 Difference]: Start difference. First operand 6202 states and 18595 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:08,147 INFO L93 Difference]: Finished difference Result 7943 states and 23675 transitions. [2021-08-21 12:49:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:49:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:08,159 INFO L225 Difference]: With dead ends: 7943 [2021-08-21 12:49:08,160 INFO L226 Difference]: Without dead ends: 7718 [2021-08-21 12:49:08,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1828.0ms TimeCoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:49:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2021-08-21 12:49:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 6148. [2021-08-21 12:49:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.0008134049129658) internal successors, (18446), 6147 states have internal predecessors, (18446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 18446 transitions. [2021-08-21 12:49:08,249 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 18446 transitions. Word has length 37 [2021-08-21 12:49:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 18446 transitions. [2021-08-21 12:49:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 18446 transitions. [2021-08-21 12:49:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:08,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:08,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:08,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:08,484 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 12:49:08,485 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1472913493, now seen corresponding path program 51 times [2021-08-21 12:49:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741837750] [2021-08-21 12:49:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:08,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:08,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:08,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741837750] [2021-08-21 12:49:08,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741837750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:08,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098703635] [2021-08-21 12:49:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:08,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:08,950 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:08,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:49:12,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:49:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:49:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:12,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:12,951 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 27 treesize of output 15 [2021-08-21 12:49:13,264 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 12:49:13,264 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 33 treesize of output 17 [2021-08-21 12:49:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098703635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:13,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:13,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171316935] [2021-08-21 12:49:13,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:13,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:13,575 INFO L87 Difference]: Start difference. First operand 6148 states and 18446 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:16,221 INFO L93 Difference]: Finished difference Result 7422 states and 22057 transitions. [2021-08-21 12:49:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:49:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:16,233 INFO L225 Difference]: With dead ends: 7422 [2021-08-21 12:49:16,233 INFO L226 Difference]: Without dead ends: 7232 [2021-08-21 12:49:16,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1960.2ms TimeCoverageRelationStatistics Valid=264, Invalid=3396, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:49:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-08-21 12:49:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6145. [2021-08-21 12:49:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6145 states, 6144 states have (on average 3.0009765625) internal successors, (18438), 6144 states have internal predecessors, (18438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6145 states to 6145 states and 18438 transitions. [2021-08-21 12:49:16,319 INFO L78 Accepts]: Start accepts. Automaton has 6145 states and 18438 transitions. Word has length 37 [2021-08-21 12:49:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:16,319 INFO L470 AbstractCegarLoop]: Abstraction has 6145 states and 18438 transitions. [2021-08-21 12:49:16,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6145 states and 18438 transitions. [2021-08-21 12:49:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:16,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:16,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:16,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:16,541 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 12:49:16,541 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1077689797, now seen corresponding path program 52 times [2021-08-21 12:49:16,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:16,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221793398] [2021-08-21 12:49:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:16,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:17,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:17,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221793398] [2021-08-21 12:49:17,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221793398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:17,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262963108] [2021-08-21 12:49:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:17,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:17,009 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:17,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:49:20,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:21,260 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:21,260 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 27 treesize of output 15 [2021-08-21 12:49:21,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:49:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262963108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:21,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:21,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:21,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761682606] [2021-08-21 12:49:21,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:21,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:21,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:21,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:21,987 INFO L87 Difference]: Start difference. First operand 6145 states and 18438 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:24,649 INFO L93 Difference]: Finished difference Result 7614 states and 22647 transitions. [2021-08-21 12:49:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:49:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:24,661 INFO L225 Difference]: With dead ends: 7614 [2021-08-21 12:49:24,661 INFO L226 Difference]: Without dead ends: 7427 [2021-08-21 12:49:24,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1979.7ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:49:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7427 states. [2021-08-21 12:49:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7427 to 6166. [2021-08-21 12:49:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6166 states, 6165 states have (on average 3.0004866180048664) internal successors, (18498), 6165 states have internal predecessors, (18498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 18498 transitions. [2021-08-21 12:49:24,758 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 18498 transitions. Word has length 37 [2021-08-21 12:49:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 6166 states and 18498 transitions. [2021-08-21 12:49:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 18498 transitions. [2021-08-21 12:49:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:24,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:24,766 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:24,797 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 12:49:24,993 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 12:49:24,993 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1103023359, now seen corresponding path program 53 times [2021-08-21 12:49:24,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:24,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380996832] [2021-08-21 12:49:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:24,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:25,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:25,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380996832] [2021-08-21 12:49:25,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380996832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:25,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033685474] [2021-08-21 12:49:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:25,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:25,534 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:25,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:49:29,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:49:29,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:49:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:29,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:29,777 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 31 treesize of output 19 [2021-08-21 12:49:30,183 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:30,184 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 37 treesize of output 21 [2021-08-21 12:49:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033685474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:30,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:30,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:30,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847406380] [2021-08-21 12:49:30,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:30,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:30,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:30,467 INFO L87 Difference]: Start difference. First operand 6166 states and 18498 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:32,799 INFO L93 Difference]: Finished difference Result 7566 states and 22436 transitions. [2021-08-21 12:49:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:49:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:32,811 INFO L225 Difference]: With dead ends: 7566 [2021-08-21 12:49:32,812 INFO L226 Difference]: Without dead ends: 7325 [2021-08-21 12:49:32,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1843.3ms TimeCoverageRelationStatistics Valid=284, Invalid=3498, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:49:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7325 states. [2021-08-21 12:49:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7325 to 6157. [2021-08-21 12:49:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6157 states, 6156 states have (on average 3.0014619883040936) internal successors, (18477), 6156 states have internal predecessors, (18477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 18477 transitions. [2021-08-21 12:49:32,897 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 18477 transitions. Word has length 37 [2021-08-21 12:49:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:32,898 INFO L470 AbstractCegarLoop]: Abstraction has 6157 states and 18477 transitions. [2021-08-21 12:49:32,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 18477 transitions. [2021-08-21 12:49:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:32,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:32,906 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:32,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:33,111 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 12:49:33,112 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -119496729, now seen corresponding path program 54 times [2021-08-21 12:49:33,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:33,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918668504] [2021-08-21 12:49:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:33,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:33,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918668504] [2021-08-21 12:49:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918668504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425362643] [2021-08-21 12:49:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:33,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:33,621 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:33,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:49:37,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:49:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:49:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:38,022 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:38,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:49:38,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:38,271 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 29 treesize of output 17 [2021-08-21 12:49:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:38,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425362643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:38,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:38,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:49:38,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876912851] [2021-08-21 12:49:38,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:49:38,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:49:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:49:38,552 INFO L87 Difference]: Start difference. First operand 6157 states and 18477 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:49:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:40,566 INFO L93 Difference]: Finished difference Result 7964 states and 23724 transitions. [2021-08-21 12:49:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:49:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:49:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:40,579 INFO L225 Difference]: With dead ends: 7964 [2021-08-21 12:49:40,580 INFO L226 Difference]: Without dead ends: 7714 [2021-08-21 12:49:40,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1523.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2738, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:49:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-08-21 12:49:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 6124. [2021-08-21 12:49:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 3.0042462845010616) internal successors, (18395), 6123 states have internal predecessors, (18395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 18395 transitions. [2021-08-21 12:49:40,661 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 18395 transitions. Word has length 37 [2021-08-21 12:49:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:40,662 INFO L470 AbstractCegarLoop]: Abstraction has 6124 states and 18395 transitions. [2021-08-21 12:49:40,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:49:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 18395 transitions. [2021-08-21 12:49:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:40,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:40,669 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:40,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:40,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 12:49:40,897 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1252488367, now seen corresponding path program 55 times [2021-08-21 12:49:40,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:40,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713355481] [2021-08-21 12:49:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:40,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:41,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:41,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713355481] [2021-08-21 12:49:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713355481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:41,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512112265] [2021-08-21 12:49:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:41,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:41,347 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:41,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:49:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:45,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:45,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:49:45,952 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:45,952 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 29 treesize of output 17 [2021-08-21 12:49:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:46,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512112265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:46,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:46,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:46,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625196873] [2021-08-21 12:49:46,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:46,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:46,260 INFO L87 Difference]: Start difference. First operand 6124 states and 18395 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:48,996 INFO L93 Difference]: Finished difference Result 7974 states and 23944 transitions. [2021-08-21 12:49:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:49:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:49,010 INFO L225 Difference]: With dead ends: 7974 [2021-08-21 12:49:49,010 INFO L226 Difference]: Without dead ends: 7895 [2021-08-21 12:49:49,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1877.6ms TimeCoverageRelationStatistics Valid=258, Invalid=3524, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:49:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2021-08-21 12:49:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 6123. [2021-08-21 12:49:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 6122 states have (on average 3.0042469781117283) internal successors, (18392), 6122 states have internal predecessors, (18392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 18392 transitions. [2021-08-21 12:49:49,139 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 18392 transitions. Word has length 37 [2021-08-21 12:49:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:49,139 INFO L470 AbstractCegarLoop]: Abstraction has 6123 states and 18392 transitions. [2021-08-21 12:49:49,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 18392 transitions. [2021-08-21 12:49:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:49,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:49,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:49,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:49,368 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 12:49:49,369 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 861765773, now seen corresponding path program 56 times [2021-08-21 12:49:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:49,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923436446] [2021-08-21 12:49:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:49,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:49,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:49,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923436446] [2021-08-21 12:49:49,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923436446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:49,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078406724] [2021-08-21 12:49:49,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:49,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:49,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:49,939 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:49,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:49:54,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:54,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:54,502 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:54,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:49:54,946 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:49:54,946 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 30 treesize of output 18 [2021-08-21 12:49:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:55,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078406724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:55,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:55,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:49:55,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804068775] [2021-08-21 12:49:55,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:49:55,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:49:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:55,178 INFO L87 Difference]: Start difference. First operand 6123 states and 18392 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:57,624 INFO L93 Difference]: Finished difference Result 8152 states and 24462 transitions. [2021-08-21 12:49:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:49:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:49:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:57,668 INFO L225 Difference]: With dead ends: 8152 [2021-08-21 12:49:57,668 INFO L226 Difference]: Without dead ends: 8073 [2021-08-21 12:49:57,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1902.6ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 12:49:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8073 states. [2021-08-21 12:49:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8073 to 6120. [2021-08-21 12:49:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.0044124857002776) internal successors, (18384), 6119 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 18384 transitions. [2021-08-21 12:49:57,747 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 18384 transitions. Word has length 37 [2021-08-21 12:49:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 18384 transitions. [2021-08-21 12:49:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 18384 transitions. [2021-08-21 12:49:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:57,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:57,754 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:57,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:57,964 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 12:49:57,965 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash -345105377, now seen corresponding path program 57 times [2021-08-21 12:49:57,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:57,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713466614] [2021-08-21 12:49:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:57,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:58,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:58,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713466614] [2021-08-21 12:49:58,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713466614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:58,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531002150] [2021-08-21 12:49:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:58,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:58,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:58,427 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:58,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:50:02,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:50:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:50:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:02,909 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:50:03,377 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:50:03,377 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 47 treesize of output 34 [2021-08-21 12:50:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:03,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531002150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:03,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:03,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:50:03,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104819310] [2021-08-21 12:50:03,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:03,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:03,530 INFO L87 Difference]: Start difference. First operand 6120 states and 18384 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:50:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:05,002 INFO L93 Difference]: Finished difference Result 6369 states and 18974 transitions. [2021-08-21 12:50:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:50:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:50:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:05,016 INFO L225 Difference]: With dead ends: 6369 [2021-08-21 12:50:05,016 INFO L226 Difference]: Without dead ends: 6342 [2021-08-21 12:50:05,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1561.6ms TimeCoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:50:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2021-08-21 12:50:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 6120. [2021-08-21 12:50:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.0044124857002776) internal successors, (18384), 6119 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 18384 transitions. [2021-08-21 12:50:05,102 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 18384 transitions. Word has length 37 [2021-08-21 12:50:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:05,102 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 18384 transitions. [2021-08-21 12:50:05,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:50:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 18384 transitions. [2021-08-21 12:50:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:05,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:05,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:05,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:05,330 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 12:50:05,330 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash 160338161, now seen corresponding path program 58 times [2021-08-21 12:50:05,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:05,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280959408] [2021-08-21 12:50:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:05,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:06,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:06,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280959408] [2021-08-21 12:50:06,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280959408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:06,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008328914] [2021-08-21 12:50:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:06,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:06,049 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:06,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:50:10,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:50:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:11,038 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:50:11,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:11,144 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 29 treesize of output 17 [2021-08-21 12:50:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008328914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:11,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-21 12:50:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298630289] [2021-08-21 12:50:11,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:50:11,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:50:11,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:50:11,416 INFO L87 Difference]: Start difference. First operand 6120 states and 18384 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:17,806 INFO L93 Difference]: Finished difference Result 15126 states and 44698 transitions. [2021-08-21 12:50:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 12:50:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:50:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:17,836 INFO L225 Difference]: With dead ends: 15126 [2021-08-21 12:50:17,836 INFO L226 Difference]: Without dead ends: 14755 [2021-08-21 12:50:17,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 4813.8ms TimeCoverageRelationStatistics Valid=1442, Invalid=13810, Unknown=0, NotChecked=0, Total=15252 [2021-08-21 12:50:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-08-21 12:50:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 7190. [2021-08-21 12:50:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0223953261927945) internal successors, (21728), 7189 states have internal predecessors, (21728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21728 transitions. [2021-08-21 12:50:18,019 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21728 transitions. Word has length 37 [2021-08-21 12:50:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:18,019 INFO L470 AbstractCegarLoop]: Abstraction has 7190 states and 21728 transitions. [2021-08-21 12:50:18,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21728 transitions. [2021-08-21 12:50:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:18,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:18,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:18,058 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 12:50:18,247 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 12:50:18,247 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1856644401, now seen corresponding path program 59 times [2021-08-21 12:50:18,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:18,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358428649] [2021-08-21 12:50:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:18,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:18,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:18,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358428649] [2021-08-21 12:50:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358428649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:18,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745839130] [2021-08-21 12:50:18,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:18,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:18,796 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:50:23,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:50:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:50:23,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:23,898 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:50:23,898 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 61 treesize of output 44 [2021-08-21 12:50:24,035 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:50:24,035 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 37 treesize of output 28 [2021-08-21 12:50:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745839130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:24,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:24,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:50:24,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081812312] [2021-08-21 12:50:24,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:24,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:24,387 INFO L87 Difference]: Start difference. First operand 7190 states and 21728 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:50:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:28,222 INFO L93 Difference]: Finished difference Result 11936 states and 35696 transitions. [2021-08-21 12:50:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 12:50:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:50:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:28,249 INFO L225 Difference]: With dead ends: 11936 [2021-08-21 12:50:28,249 INFO L226 Difference]: Without dead ends: 11465 [2021-08-21 12:50:28,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2473.7ms TimeCoverageRelationStatistics Valid=433, Invalid=6373, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 12:50:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-08-21 12:50:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 7611. [2021-08-21 12:50:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7611 states, 7610 states have (on average 3.026544021024967) internal successors, (23032), 7610 states have internal predecessors, (23032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7611 states to 7611 states and 23032 transitions. [2021-08-21 12:50:28,407 INFO L78 Accepts]: Start accepts. Automaton has 7611 states and 23032 transitions. Word has length 37 [2021-08-21 12:50:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 7611 states and 23032 transitions. [2021-08-21 12:50:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:50:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7611 states and 23032 transitions. [2021-08-21 12:50:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:28,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:28,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:28,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 12:50:28,645 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 12:50:28,645 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 47290237, now seen corresponding path program 60 times [2021-08-21 12:50:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:28,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195491547] [2021-08-21 12:50:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:28,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:29,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195491547] [2021-08-21 12:50:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195491547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:29,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957798919] [2021-08-21 12:50:29,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:29,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:29,183 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:29,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:50:33,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:50:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:50:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:34,482 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 12:50:34,482 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 41 treesize of output 30 [2021-08-21 12:50:34,591 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:34,592 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 23 [2021-08-21 12:50:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:34,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957798919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:34,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:34,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:50:34,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85280710] [2021-08-21 12:50:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:50:34,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:50:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:50:34,886 INFO L87 Difference]: Start difference. First operand 7611 states and 23032 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:37,838 INFO L93 Difference]: Finished difference Result 10860 states and 32501 transitions. [2021-08-21 12:50:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:50:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:50:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:37,855 INFO L225 Difference]: With dead ends: 10860 [2021-08-21 12:50:37,856 INFO L226 Difference]: Without dead ends: 10596 [2021-08-21 12:50:37,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2173.2ms TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:50:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2021-08-21 12:50:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 7615. [2021-08-21 12:50:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.026924087207775) internal successors, (23047), 7614 states have internal predecessors, (23047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 23047 transitions. [2021-08-21 12:50:37,982 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 23047 transitions. Word has length 37 [2021-08-21 12:50:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 7615 states and 23047 transitions. [2021-08-21 12:50:37,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 23047 transitions. [2021-08-21 12:50:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:37,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:37,992 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:38,024 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 12:50:38,215 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 12:50:38,215 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -183400359, now seen corresponding path program 61 times [2021-08-21 12:50:38,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:38,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853314293] [2021-08-21 12:50:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:38,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:38,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:38,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853314293] [2021-08-21 12:50:38,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853314293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:38,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042715692] [2021-08-21 12:50:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:38,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:38,789 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:38,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:50:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:50:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:44,161 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:50:44,289 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:50:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042715692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:44,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:44,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:50:44,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432206108] [2021-08-21 12:50:44,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:50:44,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:50:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:50:44,589 INFO L87 Difference]: Start difference. First operand 7615 states and 23047 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:47,772 INFO L93 Difference]: Finished difference Result 11450 states and 33946 transitions. [2021-08-21 12:50:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:50:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:50:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:47,792 INFO L225 Difference]: With dead ends: 11450 [2021-08-21 12:50:47,792 INFO L226 Difference]: Without dead ends: 11276 [2021-08-21 12:50:47,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2650.1ms TimeCoverageRelationStatistics Valid=584, Invalid=5422, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 12:50:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11276 states. [2021-08-21 12:50:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11276 to 7696. [2021-08-21 12:50:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7696 states, 7695 states have (on average 3.020142949967511) internal successors, (23240), 7695 states have internal predecessors, (23240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7696 states to 7696 states and 23240 transitions. [2021-08-21 12:50:47,922 INFO L78 Accepts]: Start accepts. Automaton has 7696 states and 23240 transitions. Word has length 37 [2021-08-21 12:50:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:47,922 INFO L470 AbstractCegarLoop]: Abstraction has 7696 states and 23240 transitions. [2021-08-21 12:50:47,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7696 states and 23240 transitions. [2021-08-21 12:50:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:47,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:47,932 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:47,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:50:48,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:50:48,157 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1512905881, now seen corresponding path program 62 times [2021-08-21 12:50:48,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:48,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886695053] [2021-08-21 12:50:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:48,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:48,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:48,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886695053] [2021-08-21 12:50:48,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886695053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:48,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313267774] [2021-08-21 12:50:48,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:48,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:48,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:48,722 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:48,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:50:53,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:50:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:53,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:50:54,114 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:50:54,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:50:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:54,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313267774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:54,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:54,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-08-21 12:50:54,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738281937] [2021-08-21 12:50:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:50:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:50:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:50:54,509 INFO L87 Difference]: Start difference. First operand 7696 states and 23240 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:50:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:57,170 INFO L93 Difference]: Finished difference Result 9167 states and 27468 transitions. [2021-08-21 12:50:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:50:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 37 [2021-08-21 12:50:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:57,186 INFO L225 Difference]: With dead ends: 9167 [2021-08-21 12:50:57,186 INFO L226 Difference]: Without dead ends: 8935 [2021-08-21 12:50:57,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1869.2ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:50:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2021-08-21 12:50:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 7666. [2021-08-21 12:50:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 3.0251793868232224) internal successors, (23188), 7665 states have internal predecessors, (23188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 23188 transitions. [2021-08-21 12:50:57,308 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 23188 transitions. Word has length 37 [2021-08-21 12:50:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 23188 transitions. [2021-08-21 12:50:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 12:50:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 23188 transitions. [2021-08-21 12:50:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:50:57,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:57,318 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:57,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:57,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:50:57,531 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -612161387, now seen corresponding path program 63 times [2021-08-21 12:50:57,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:57,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189832572] [2021-08-21 12:50:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:57,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:58,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:58,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189832572] [2021-08-21 12:50:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189832572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:58,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022007262] [2021-08-21 12:50:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:58,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:58,242 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:58,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:51:02,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:51:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:51:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:03,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:03,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:51:03,635 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:03,635 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 29 treesize of output 17 [2021-08-21 12:51:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022007262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27337100] [2021-08-21 12:51:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:03,984 INFO L87 Difference]: Start difference. First operand 7666 states and 23188 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:07,667 INFO L93 Difference]: Finished difference Result 12772 states and 37904 transitions. [2021-08-21 12:51:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:51:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:07,689 INFO L225 Difference]: With dead ends: 12772 [2021-08-21 12:51:07,689 INFO L226 Difference]: Without dead ends: 12493 [2021-08-21 12:51:07,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2970.7ms TimeCoverageRelationStatistics Valid=653, Invalid=6319, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:51:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2021-08-21 12:51:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 7750. [2021-08-21 12:51:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.0228416569879983) internal successors, (23424), 7749 states have internal predecessors, (23424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 23424 transitions. [2021-08-21 12:51:07,824 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 23424 transitions. Word has length 37 [2021-08-21 12:51:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:07,824 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 23424 transitions. [2021-08-21 12:51:07,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 23424 transitions. [2021-08-21 12:51:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:07,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:07,834 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:07,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:08,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:51:08,049 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1084144853, now seen corresponding path program 64 times [2021-08-21 12:51:08,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:08,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729486330] [2021-08-21 12:51:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:08,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:08,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:08,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729486330] [2021-08-21 12:51:08,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729486330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:08,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786162607] [2021-08-21 12:51:08,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:08,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:08,447 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:51:13,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:13,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:51:13,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:13,735 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:13,735 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 27 treesize of output 15 [2021-08-21 12:51:14,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:14,044 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 29 treesize of output 17 [2021-08-21 12:51:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786162607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:14,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:14,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:14,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377287737] [2021-08-21 12:51:14,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:14,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:14,433 INFO L87 Difference]: Start difference. First operand 7750 states and 23424 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:16,948 INFO L93 Difference]: Finished difference Result 9300 states and 27867 transitions. [2021-08-21 12:51:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:51:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:16,964 INFO L225 Difference]: With dead ends: 9300 [2021-08-21 12:51:16,965 INFO L226 Difference]: Without dead ends: 9133 [2021-08-21 12:51:16,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1945.5ms TimeCoverageRelationStatistics Valid=249, Invalid=3533, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:51:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2021-08-21 12:51:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 7735. [2021-08-21 12:51:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 7734 states have (on average 3.0243082492888544) internal successors, (23390), 7734 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 23390 transitions. [2021-08-21 12:51:17,081 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 23390 transitions. Word has length 37 [2021-08-21 12:51:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:17,081 INFO L470 AbstractCegarLoop]: Abstraction has 7735 states and 23390 transitions. [2021-08-21 12:51:17,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 23390 transitions. [2021-08-21 12:51:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:17,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:17,091 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:17,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 12:51:17,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 12:51:17,305 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1618901641, now seen corresponding path program 65 times [2021-08-21 12:51:17,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:17,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313839637] [2021-08-21 12:51:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:17,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:17,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:17,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313839637] [2021-08-21 12:51:17,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313839637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:17,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18220675] [2021-08-21 12:51:17,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:17,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:17,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:17,872 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:17,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:51:22,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:51:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:51:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:23,147 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:23,148 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 31 treesize of output 19 [2021-08-21 12:51:23,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:23,407 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 36 treesize of output 20 [2021-08-21 12:51:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18220675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:23,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:23,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:23,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641282317] [2021-08-21 12:51:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:23,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:23,696 INFO L87 Difference]: Start difference. First operand 7735 states and 23390 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:26,283 INFO L93 Difference]: Finished difference Result 11219 states and 33580 transitions. [2021-08-21 12:51:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:51:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:26,303 INFO L225 Difference]: With dead ends: 11219 [2021-08-21 12:51:26,304 INFO L226 Difference]: Without dead ends: 10978 [2021-08-21 12:51:26,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1840.5ms TimeCoverageRelationStatistics Valid=286, Invalid=3746, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 12:51:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10978 states. [2021-08-21 12:51:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10978 to 7765. [2021-08-21 12:51:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7765 states, 7764 states have (on average 3.024729520865533) internal successors, (23484), 7764 states have internal predecessors, (23484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7765 states to 7765 states and 23484 transitions. [2021-08-21 12:51:26,451 INFO L78 Accepts]: Start accepts. Automaton has 7765 states and 23484 transitions. Word has length 37 [2021-08-21 12:51:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 7765 states and 23484 transitions. [2021-08-21 12:51:26,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7765 states and 23484 transitions. [2021-08-21 12:51:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:26,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:26,463 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:26,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:51:26,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:26,677 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:26,677 INFO L82 PathProgramCache]: Analyzing trace with hash 741255377, now seen corresponding path program 66 times [2021-08-21 12:51:26,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:26,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636328373] [2021-08-21 12:51:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:26,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:27,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:27,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636328373] [2021-08-21 12:51:27,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636328373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:27,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470866926] [2021-08-21 12:51:27,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:27,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:27,139 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:51:32,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:51:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:51:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:32,589 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:51:32,889 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:32,890 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 29 treesize of output 17 [2021-08-21 12:51:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:33,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470866926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:33,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:33,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:33,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069454342] [2021-08-21 12:51:33,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:33,212 INFO L87 Difference]: Start difference. First operand 7765 states and 23484 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:36,532 INFO L93 Difference]: Finished difference Result 10846 states and 31929 transitions. [2021-08-21 12:51:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:51:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:36,549 INFO L225 Difference]: With dead ends: 10846 [2021-08-21 12:51:36,549 INFO L226 Difference]: Without dead ends: 10643 [2021-08-21 12:51:36,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 2679.1ms TimeCoverageRelationStatistics Valid=551, Invalid=5769, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 12:51:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2021-08-21 12:51:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 7806. [2021-08-21 12:51:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7806 states, 7805 states have (on average 3.0226777706598336) internal successors, (23592), 7805 states have internal predecessors, (23592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7806 states to 7806 states and 23592 transitions. [2021-08-21 12:51:36,674 INFO L78 Accepts]: Start accepts. Automaton has 7806 states and 23592 transitions. Word has length 37 [2021-08-21 12:51:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:36,674 INFO L470 AbstractCegarLoop]: Abstraction has 7806 states and 23592 transitions. [2021-08-21 12:51:36,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7806 states and 23592 transitions. [2021-08-21 12:51:36,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:36,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:36,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:36,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 12:51:36,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:36,909 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1857405679, now seen corresponding path program 67 times [2021-08-21 12:51:36,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:36,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295005857] [2021-08-21 12:51:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:36,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:37,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:37,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295005857] [2021-08-21 12:51:37,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295005857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:37,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274201889] [2021-08-21 12:51:37,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:37,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:37,578 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:37,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:51:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:51:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:42,969 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:42,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:51:43,278 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:43,278 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 29 treesize of output 17 [2021-08-21 12:51:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:43,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274201889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:43,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:43,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:43,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851825593] [2021-08-21 12:51:43,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:43,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:43,677 INFO L87 Difference]: Start difference. First operand 7806 states and 23592 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:46,160 INFO L93 Difference]: Finished difference Result 9447 states and 28401 transitions. [2021-08-21 12:51:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:51:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:46,177 INFO L225 Difference]: With dead ends: 9447 [2021-08-21 12:51:46,177 INFO L226 Difference]: Without dead ends: 9283 [2021-08-21 12:51:46,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1866.7ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:51:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2021-08-21 12:51:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 7876. [2021-08-21 12:51:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 3.0233650793650795) internal successors, (23809), 7875 states have internal predecessors, (23809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 23809 transitions. [2021-08-21 12:51:46,304 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 23809 transitions. Word has length 37 [2021-08-21 12:51:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:46,304 INFO L470 AbstractCegarLoop]: Abstraction has 7876 states and 23809 transitions. [2021-08-21 12:51:46,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 23809 transitions. [2021-08-21 12:51:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:46,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:46,315 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:46,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:46,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:46,540 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 256848461, now seen corresponding path program 68 times [2021-08-21 12:51:46,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:46,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918551066] [2021-08-21 12:51:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:46,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:46,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:46,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918551066] [2021-08-21 12:51:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918551066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:46,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745164921] [2021-08-21 12:51:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:46,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:46,995 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:51:51,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:51,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:51,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:51:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:52,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:52,373 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 27 treesize of output 15 [2021-08-21 12:51:52,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:51:52,647 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 30 treesize of output 18 [2021-08-21 12:51:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:52,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745164921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:52,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:52,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:51:52,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251388687] [2021-08-21 12:51:52,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:52,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:52,881 INFO L87 Difference]: Start difference. First operand 7876 states and 23809 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:55,149 INFO L93 Difference]: Finished difference Result 9506 states and 28655 transitions. [2021-08-21 12:51:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:51:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:51:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:55,166 INFO L225 Difference]: With dead ends: 9506 [2021-08-21 12:51:55,166 INFO L226 Difference]: Without dead ends: 9332 [2021-08-21 12:51:55,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1536.2ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:51:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-08-21 12:51:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 7909. [2021-08-21 12:51:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 3.0236469398077896) internal successors, (23911), 7908 states have internal predecessors, (23911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 23911 transitions. [2021-08-21 12:51:55,279 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 23911 transitions. Word has length 37 [2021-08-21 12:51:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:55,279 INFO L470 AbstractCegarLoop]: Abstraction has 7909 states and 23911 transitions. [2021-08-21 12:51:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 23911 transitions. [2021-08-21 12:51:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:55,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:55,289 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:55,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 12:51:55,513 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -950022689, now seen corresponding path program 69 times [2021-08-21 12:51:55,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:55,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828901358] [2021-08-21 12:51:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:55,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:55,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:55,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828901358] [2021-08-21 12:51:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828901358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:55,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840431431] [2021-08-21 12:51:55,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:55,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:55,902 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:55,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:52:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:52:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:52:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:01,335 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:01,336 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 27 treesize of output 15 [2021-08-21 12:52:01,614 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:01,615 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 30 treesize of output 18 [2021-08-21 12:52:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:01,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840431431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:01,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:01,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:52:01,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258786502] [2021-08-21 12:52:01,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:52:01,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:52:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:52:01,870 INFO L87 Difference]: Start difference. First operand 7909 states and 23911 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:03,694 INFO L93 Difference]: Finished difference Result 9672 states and 29165 transitions. [2021-08-21 12:52:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:52:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:52:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:03,710 INFO L225 Difference]: With dead ends: 9672 [2021-08-21 12:52:03,710 INFO L226 Difference]: Without dead ends: 9485 [2021-08-21 12:52:03,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1435.7ms TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:52:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9485 states. [2021-08-21 12:52:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9485 to 7924. [2021-08-21 12:52:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7924 states, 7923 states have (on average 3.023854600530102) internal successors, (23958), 7923 states have internal predecessors, (23958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7924 states to 7924 states and 23958 transitions. [2021-08-21 12:52:03,821 INFO L78 Accepts]: Start accepts. Automaton has 7924 states and 23958 transitions. Word has length 37 [2021-08-21 12:52:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:03,821 INFO L470 AbstractCegarLoop]: Abstraction has 7924 states and 23958 transitions. [2021-08-21 12:52:03,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7924 states and 23958 transitions. [2021-08-21 12:52:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:03,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:03,831 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:03,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:04,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:04,057 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1726408661, now seen corresponding path program 70 times [2021-08-21 12:52:04,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:04,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004832387] [2021-08-21 12:52:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:04,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:04,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:04,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004832387] [2021-08-21 12:52:04,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004832387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:04,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42249025] [2021-08-21 12:52:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:04,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:04,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:04,513 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:04,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:52:09,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:09,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:52:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:10,162 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:10,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:52:10,533 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 12:52:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42249025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:10,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:52:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070693186] [2021-08-21 12:52:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:52:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:52:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:52:10,878 INFO L87 Difference]: Start difference. First operand 7924 states and 23958 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:13,245 INFO L93 Difference]: Finished difference Result 9339 states and 28128 transitions. [2021-08-21 12:52:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:52:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:52:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:13,260 INFO L225 Difference]: With dead ends: 9339 [2021-08-21 12:52:13,261 INFO L226 Difference]: Without dead ends: 9124 [2021-08-21 12:52:13,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1918.3ms TimeCoverageRelationStatistics Valid=211, Invalid=3095, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:52:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9124 states. [2021-08-21 12:52:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9124 to 7909. [2021-08-21 12:52:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 3.0279463834092057) internal successors, (23945), 7908 states have internal predecessors, (23945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 23945 transitions. [2021-08-21 12:52:13,374 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 23945 transitions. Word has length 37 [2021-08-21 12:52:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:13,374 INFO L470 AbstractCegarLoop]: Abstraction has 7909 states and 23945 transitions. [2021-08-21 12:52:13,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 23945 transitions. [2021-08-21 12:52:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:13,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:13,384 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:13,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:13,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:13,613 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash -716117893, now seen corresponding path program 71 times [2021-08-21 12:52:13,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:13,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715084427] [2021-08-21 12:52:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:13,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:14,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:14,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715084427] [2021-08-21 12:52:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715084427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:14,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463330892] [2021-08-21 12:52:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:14,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:14,119 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:14,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:52:19,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:52:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 12:52:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:20,040 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:20,040 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 31 treesize of output 19 [2021-08-21 12:52:20,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:20,132 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 36 treesize of output 20 [2021-08-21 12:52:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:20,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463330892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:20,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:20,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-08-21 12:52:20,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018320267] [2021-08-21 12:52:20,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:52:20,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:52:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:52:20,382 INFO L87 Difference]: Start difference. First operand 7909 states and 23945 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:24,114 INFO L93 Difference]: Finished difference Result 16468 states and 48789 transitions. [2021-08-21 12:52:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:52:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:52:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:24,145 INFO L225 Difference]: With dead ends: 16468 [2021-08-21 12:52:24,145 INFO L226 Difference]: Without dead ends: 16134 [2021-08-21 12:52:24,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 2968.3ms TimeCoverageRelationStatistics Valid=1111, Invalid=9601, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 12:52:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2021-08-21 12:52:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 8286. [2021-08-21 12:52:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 8285 states have (on average 3.0292094146047073) internal successors, (25097), 8285 states have internal predecessors, (25097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 25097 transitions. [2021-08-21 12:52:24,318 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 25097 transitions. Word has length 37 [2021-08-21 12:52:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:24,318 INFO L470 AbstractCegarLoop]: Abstraction has 8286 states and 25097 transitions. [2021-08-21 12:52:24,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 25097 transitions. [2021-08-21 12:52:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:24,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:24,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:24,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:52:24,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:52:24,542 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 980188347, now seen corresponding path program 72 times [2021-08-21 12:52:24,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:24,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483961265] [2021-08-21 12:52:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:24,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:24,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:24,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483961265] [2021-08-21 12:52:24,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483961265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:24,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218289642] [2021-08-21 12:52:24,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:24,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:24,953 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:24,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:52:30,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:52:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:52:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:30,773 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:52:30,875 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:30,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:52:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218289642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:31,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:31,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-08-21 12:52:31,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177271256] [2021-08-21 12:52:31,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:52:31,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:52:31,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:52:31,217 INFO L87 Difference]: Start difference. First operand 8286 states and 25097 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:52:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:36,196 INFO L93 Difference]: Finished difference Result 13209 states and 39646 transitions. [2021-08-21 12:52:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 12:52:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:52:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:36,221 INFO L225 Difference]: With dead ends: 13209 [2021-08-21 12:52:36,221 INFO L226 Difference]: Without dead ends: 12836 [2021-08-21 12:52:36,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 3034.9ms TimeCoverageRelationStatistics Valid=535, Invalid=8021, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 12:52:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12836 states. [2021-08-21 12:52:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12836 to 8268. [2021-08-21 12:52:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8268 states, 8267 states have (on average 3.035805007862586) internal successors, (25097), 8267 states have internal predecessors, (25097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 25097 transitions. [2021-08-21 12:52:36,370 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 25097 transitions. Word has length 37 [2021-08-21 12:52:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 8268 states and 25097 transitions. [2021-08-21 12:52:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:52:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 25097 transitions. [2021-08-21 12:52:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:36,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:36,381 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:36,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:52:36,590 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:36,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1956382839, now seen corresponding path program 73 times [2021-08-21 12:52:36,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:36,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691858471] [2021-08-21 12:52:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:36,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:37,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:37,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691858471] [2021-08-21 12:52:37,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691858471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:37,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188177076] [2021-08-21 12:52:37,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:37,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:37,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:37,181 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:37,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:52:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:52:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:42,912 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:42,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:52:43,029 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:43,030 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 29 treesize of output 17 [2021-08-21 12:52:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188177076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:43,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-21 12:52:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168220298] [2021-08-21 12:52:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:52:43,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:52:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:52:43,354 INFO L87 Difference]: Start difference. First operand 8268 states and 25097 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:48,285 INFO L93 Difference]: Finished difference Result 17271 states and 51095 transitions. [2021-08-21 12:52:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:52:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:52:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:48,316 INFO L225 Difference]: With dead ends: 17271 [2021-08-21 12:52:48,316 INFO L226 Difference]: Without dead ends: 17000 [2021-08-21 12:52:48,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3191 ImplicationChecksByTransitivity, 3790.7ms TimeCoverageRelationStatistics Valid=1112, Invalid=10444, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 12:52:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17000 states. [2021-08-21 12:52:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17000 to 8390. [2021-08-21 12:52:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8389 states have (on average 3.029681726069853) internal successors, (25416), 8389 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 25416 transitions. [2021-08-21 12:52:48,528 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 25416 transitions. Word has length 37 [2021-08-21 12:52:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:48,529 INFO L470 AbstractCegarLoop]: Abstraction has 8390 states and 25416 transitions. [2021-08-21 12:52:48,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 25416 transitions. [2021-08-21 12:52:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:52:48,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:48,539 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:48,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:48,765 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -260076599, now seen corresponding path program 74 times [2021-08-21 12:52:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:48,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602207542] [2021-08-21 12:52:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:48,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:49,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602207542] [2021-08-21 12:52:49,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602207542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043854741] [2021-08-21 12:52:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:49,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:49,270 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:52:54,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:52:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:55,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:52:55,439 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:52:55,439 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 29 treesize of output 17 [2021-08-21 12:52:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:55,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043854741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:55,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:52:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55622832] [2021-08-21 12:52:55,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:52:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:52:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:52:55,826 INFO L87 Difference]: Start difference. First operand 8390 states and 25416 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:01,214 INFO L93 Difference]: Finished difference Result 13469 states and 40380 transitions. [2021-08-21 12:53:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 12:53:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:01,240 INFO L225 Difference]: With dead ends: 13469 [2021-08-21 12:53:01,240 INFO L226 Difference]: Without dead ends: 13165 [2021-08-21 12:53:01,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 3586.6ms TimeCoverageRelationStatistics Valid=542, Invalid=8200, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 12:53:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13165 states. [2021-08-21 12:53:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13165 to 8288. [2021-08-21 12:53:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 3.0330638349221672) internal successors, (25135), 8287 states have internal predecessors, (25135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 25135 transitions. [2021-08-21 12:53:01,413 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 25135 transitions. Word has length 37 [2021-08-21 12:53:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:01,413 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 25135 transitions. [2021-08-21 12:53:01,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 25135 transitions. [2021-08-21 12:53:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:01,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:01,424 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:01,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:01,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:01,649 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1427588525, now seen corresponding path program 75 times [2021-08-21 12:53:01,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:01,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116922125] [2021-08-21 12:53:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:01,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:02,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116922125] [2021-08-21 12:53:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116922125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545794594] [2021-08-21 12:53:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:02,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:02,116 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:02,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:53:07,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:53:07,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:07,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:53:07,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:08,264 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:08,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:53:08,572 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:53:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:08,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545794594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:08,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:08,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:53:08,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726607207] [2021-08-21 12:53:08,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:08,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:08,901 INFO L87 Difference]: Start difference. First operand 8288 states and 25135 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:13,691 INFO L93 Difference]: Finished difference Result 16372 states and 48763 transitions. [2021-08-21 12:53:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 12:53:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:13,721 INFO L225 Difference]: With dead ends: 16372 [2021-08-21 12:53:13,721 INFO L226 Difference]: Without dead ends: 16093 [2021-08-21 12:53:13,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3662.9ms TimeCoverageRelationStatistics Valid=1041, Invalid=9671, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 12:53:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16093 states. [2021-08-21 12:53:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16093 to 8506. [2021-08-21 12:53:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 3.0322163433274545) internal successors, (25789), 8505 states have internal predecessors, (25789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 25789 transitions. [2021-08-21 12:53:13,893 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 25789 transitions. Word has length 37 [2021-08-21 12:53:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:13,894 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 25789 transitions. [2021-08-21 12:53:13,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 25789 transitions. [2021-08-21 12:53:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:13,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:13,904 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:13,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:53:14,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 12:53:14,111 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1171072531, now seen corresponding path program 76 times [2021-08-21 12:53:14,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:14,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43211548] [2021-08-21 12:53:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:14,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:14,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:14,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43211548] [2021-08-21 12:53:14,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43211548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:14,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619991011] [2021-08-21 12:53:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:14,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:14,682 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:14,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:53:20,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:20,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:53:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:20,761 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:20,761 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 27 treesize of output 15 [2021-08-21 12:53:21,095 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:21,095 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 29 treesize of output 17 [2021-08-21 12:53:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619991011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:21,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:53:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137788610] [2021-08-21 12:53:21,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:21,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:21,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:21,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:21,517 INFO L87 Difference]: Start difference. First operand 8506 states and 25789 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:26,504 INFO L93 Difference]: Finished difference Result 12379 states and 37110 transitions. [2021-08-21 12:53:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 12:53:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:26,523 INFO L225 Difference]: With dead ends: 12379 [2021-08-21 12:53:26,524 INFO L226 Difference]: Without dead ends: 12095 [2021-08-21 12:53:26,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3548.6ms TimeCoverageRelationStatistics Valid=597, Invalid=8523, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 12:53:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12095 states. [2021-08-21 12:53:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12095 to 8506. [2021-08-21 12:53:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 3.0331569664902998) internal successors, (25797), 8505 states have internal predecessors, (25797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 25797 transitions. [2021-08-21 12:53:26,660 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 25797 transitions. Word has length 37 [2021-08-21 12:53:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:26,661 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 25797 transitions. [2021-08-21 12:53:26,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 25797 transitions. [2021-08-21 12:53:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:26,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:26,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:26,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:26,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:26,885 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash -636315743, now seen corresponding path program 77 times [2021-08-21 12:53:26,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:26,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483603601] [2021-08-21 12:53:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:26,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:27,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:27,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483603601] [2021-08-21 12:53:27,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483603601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:27,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490510077] [2021-08-21 12:53:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:27,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:27,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:27,397 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:27,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:53:33,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:53:33,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:53:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:33,641 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:33,641 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 27 treesize of output 15 [2021-08-21 12:53:33,896 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:53:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:34,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490510077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:34,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:34,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:53:34,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752601691] [2021-08-21 12:53:34,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:34,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:34,109 INFO L87 Difference]: Start difference. First operand 8506 states and 25797 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:37,133 INFO L93 Difference]: Finished difference Result 13781 states and 41240 transitions. [2021-08-21 12:53:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-21 12:53:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:37,165 INFO L225 Difference]: With dead ends: 13781 [2021-08-21 12:53:37,165 INFO L226 Difference]: Without dead ends: 13471 [2021-08-21 12:53:37,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2103.6ms TimeCoverageRelationStatistics Valid=489, Invalid=6821, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 12:53:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13471 states. [2021-08-21 12:53:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13471 to 8477. [2021-08-21 12:53:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 8476 states have (on average 3.033506370929684) internal successors, (25712), 8476 states have internal predecessors, (25712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 25712 transitions. [2021-08-21 12:53:37,316 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 25712 transitions. Word has length 37 [2021-08-21 12:53:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 8477 states and 25712 transitions. [2021-08-21 12:53:37,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 25712 transitions. [2021-08-21 12:53:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:37,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:37,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:37,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:37,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:37,553 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1513962007, now seen corresponding path program 78 times [2021-08-21 12:53:37,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:37,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131888210] [2021-08-21 12:53:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:37,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:37,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:37,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131888210] [2021-08-21 12:53:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131888210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:37,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955518568] [2021-08-21 12:53:37,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:37,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:37,917 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:37,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:53:43,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:53:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:53:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:43,786 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:43,787 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 27 treesize of output 15 [2021-08-21 12:53:44,054 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:44,054 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 29 treesize of output 17 [2021-08-21 12:53:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:44,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955518568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:44,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:44,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:53:44,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026939685] [2021-08-21 12:53:44,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:44,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:44,351 INFO L87 Difference]: Start difference. First operand 8477 states and 25712 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:47,988 INFO L93 Difference]: Finished difference Result 16751 states and 49916 transitions. [2021-08-21 12:53:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 12:53:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:48,018 INFO L225 Difference]: With dead ends: 16751 [2021-08-21 12:53:48,018 INFO L226 Difference]: Without dead ends: 16472 [2021-08-21 12:53:48,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 2658.6ms TimeCoverageRelationStatistics Valid=784, Invalid=8146, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 12:53:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16472 states. [2021-08-21 12:53:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16472 to 8591. [2021-08-21 12:53:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 3.032013969732247) internal successors, (26045), 8590 states have internal predecessors, (26045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 26045 transitions. [2021-08-21 12:53:48,186 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 26045 transitions. Word has length 37 [2021-08-21 12:53:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:48,186 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 26045 transitions. [2021-08-21 12:53:48,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 26045 transitions. [2021-08-21 12:53:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:48,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:48,197 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:48,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 12:53:48,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 12:53:48,413 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash 182344233, now seen corresponding path program 79 times [2021-08-21 12:53:48,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:48,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330560150] [2021-08-21 12:53:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:48,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:48,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:48,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330560150] [2021-08-21 12:53:48,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330560150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:48,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408653100] [2021-08-21 12:53:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:48,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:48,959 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:53:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:53:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:55,408 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:55,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:53:55,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:53:55,662 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 29 treesize of output 17 [2021-08-21 12:53:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:55,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408653100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:55,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:55,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:53:55,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862969057] [2021-08-21 12:53:55,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:55,994 INFO L87 Difference]: Start difference. First operand 8591 states and 26045 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:58,763 INFO L93 Difference]: Finished difference Result 11538 states and 34609 transitions. [2021-08-21 12:53:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:53:58,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:53:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:58,781 INFO L225 Difference]: With dead ends: 11538 [2021-08-21 12:53:58,782 INFO L226 Difference]: Without dead ends: 11305 [2021-08-21 12:53:58,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1934.2ms TimeCoverageRelationStatistics Valid=296, Invalid=4396, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:53:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11305 states. [2021-08-21 12:53:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 8579. [2021-08-21 12:53:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8579 states, 8578 states have (on average 3.0328747959897413) internal successors, (26016), 8578 states have internal predecessors, (26016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8579 states to 8579 states and 26016 transitions. [2021-08-21 12:53:58,914 INFO L78 Accepts]: Start accepts. Automaton has 8579 states and 26016 transitions. Word has length 37 [2021-08-21 12:53:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:58,914 INFO L470 AbstractCegarLoop]: Abstraction has 8579 states and 26016 transitions. [2021-08-21 12:53:58,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8579 states and 26016 transitions. [2021-08-21 12:53:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:53:58,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:58,924 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:58,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:59,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:59,141 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 280751871, now seen corresponding path program 80 times [2021-08-21 12:53:59,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:59,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50967371] [2021-08-21 12:53:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:59,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:59,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:59,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50967371] [2021-08-21 12:53:59,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50967371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:59,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642781782] [2021-08-21 12:53:59,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:59,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:59,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:59,615 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:54:05,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:54:05,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:06,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:06,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:54:06,453 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:06,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 12:54:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642781782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:06,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:54:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678863607] [2021-08-21 12:54:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:54:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:54:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:54:06,736 INFO L87 Difference]: Start difference. First operand 8579 states and 26016 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:09,383 INFO L93 Difference]: Finished difference Result 12267 states and 36763 transitions. [2021-08-21 12:54:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 12:54:09,383 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:54:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:09,403 INFO L225 Difference]: With dead ends: 12267 [2021-08-21 12:54:09,404 INFO L226 Difference]: Without dead ends: 11939 [2021-08-21 12:54:09,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2003.8ms TimeCoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:54:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11939 states. [2021-08-21 12:54:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11939 to 8564. [2021-08-21 12:54:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8564 states, 8563 states have (on average 3.0326988205068317) internal successors, (25969), 8563 states have internal predecessors, (25969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8564 states to 8564 states and 25969 transitions. [2021-08-21 12:54:09,544 INFO L78 Accepts]: Start accepts. Automaton has 8564 states and 25969 transitions. Word has length 37 [2021-08-21 12:54:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:09,544 INFO L470 AbstractCegarLoop]: Abstraction has 8564 states and 25969 transitions. [2021-08-21 12:54:09,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8564 states and 25969 transitions. [2021-08-21 12:54:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:54:09,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:09,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:09,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:09,756 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash -926119279, now seen corresponding path program 81 times [2021-08-21 12:54:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:09,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012460268] [2021-08-21 12:54:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:09,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:10,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:10,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012460268] [2021-08-21 12:54:10,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012460268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:10,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160478887] [2021-08-21 12:54:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:10,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:10,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:10,301 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:10,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:54:16,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:54:16,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:54:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:16,744 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:16,744 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 27 treesize of output 15 [2021-08-21 12:54:17,114 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 12:54:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:17,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160478887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:17,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:17,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:54:17,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336077075] [2021-08-21 12:54:17,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:54:17,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:17,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:54:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:54:17,401 INFO L87 Difference]: Start difference. First operand 8564 states and 25969 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:20,406 INFO L93 Difference]: Finished difference Result 11980 states and 35859 transitions. [2021-08-21 12:54:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:54:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:54:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:20,432 INFO L225 Difference]: With dead ends: 11980 [2021-08-21 12:54:20,432 INFO L226 Difference]: Without dead ends: 11672 [2021-08-21 12:54:20,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2108.2ms TimeCoverageRelationStatistics Valid=277, Invalid=3883, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:54:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11672 states. [2021-08-21 12:54:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11672 to 8524. [2021-08-21 12:54:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8524 states, 8523 states have (on average 3.0356681919511908) internal successors, (25873), 8523 states have internal predecessors, (25873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 25873 transitions. [2021-08-21 12:54:20,608 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 25873 transitions. Word has length 37 [2021-08-21 12:54:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 8524 states and 25873 transitions. [2021-08-21 12:54:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 25873 transitions. [2021-08-21 12:54:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:54:20,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:20,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:20,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 12:54:20,845 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1280542197, now seen corresponding path program 82 times [2021-08-21 12:54:20,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:20,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575633124] [2021-08-21 12:54:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:20,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:21,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:21,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575633124] [2021-08-21 12:54:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575633124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:21,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99991167] [2021-08-21 12:54:21,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:21,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:21,485 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:21,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:54:27,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:27,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:54:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:28,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:54:28,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:28,368 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 29 treesize of output 17 [2021-08-21 12:54:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99991167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:28,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-08-21 12:54:28,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957387952] [2021-08-21 12:54:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:54:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:54:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:54:28,699 INFO L87 Difference]: Start difference. First operand 8524 states and 25873 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:32,408 INFO L93 Difference]: Finished difference Result 12922 states and 38344 transitions. [2021-08-21 12:54:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:54:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:54:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:32,431 INFO L225 Difference]: With dead ends: 12922 [2021-08-21 12:54:32,431 INFO L226 Difference]: Without dead ends: 12740 [2021-08-21 12:54:32,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 3182.1ms TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 12:54:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12740 states. [2021-08-21 12:54:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12740 to 8634. [2021-08-21 12:54:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 3.0288428124638016) internal successors, (26148), 8633 states have internal predecessors, (26148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 26148 transitions. [2021-08-21 12:54:32,584 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 26148 transitions. Word has length 37 [2021-08-21 12:54:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:32,584 INFO L470 AbstractCegarLoop]: Abstraction has 8634 states and 26148 transitions. [2021-08-21 12:54:32,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 26148 transitions. [2021-08-21 12:54:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:54:32,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:32,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:32,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:32,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:32,812 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:32,813 INFO L82 PathProgramCache]: Analyzing trace with hash 415764043, now seen corresponding path program 83 times [2021-08-21 12:54:32,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:32,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275675799] [2021-08-21 12:54:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:32,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:33,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:33,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275675799] [2021-08-21 12:54:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275675799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:33,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218339286] [2021-08-21 12:54:33,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:54:33,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:33,369 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:54:39,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:54:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:54:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:40,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:40,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:54:40,439 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:54:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218339286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:40,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:40,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:54:40,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601659385] [2021-08-21 12:54:40,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:54:40,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:40,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:54:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:54:40,840 INFO L87 Difference]: Start difference. First operand 8634 states and 26148 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:44,020 INFO L93 Difference]: Finished difference Result 10005 states and 30091 transitions. [2021-08-21 12:54:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:54:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:54:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:44,037 INFO L225 Difference]: With dead ends: 10005 [2021-08-21 12:54:44,037 INFO L226 Difference]: Without dead ends: 9764 [2021-08-21 12:54:44,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3547, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:54:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-08-21 12:54:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 8540. [2021-08-21 12:54:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8540 states, 8539 states have (on average 3.0351329195456143) internal successors, (25917), 8539 states have internal predecessors, (25917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8540 states to 8540 states and 25917 transitions. [2021-08-21 12:54:44,157 INFO L78 Accepts]: Start accepts. Automaton has 8540 states and 25917 transitions. Word has length 37 [2021-08-21 12:54:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:44,157 INFO L470 AbstractCegarLoop]: Abstraction has 8540 states and 25917 transitions. [2021-08-21 12:54:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8540 states and 25917 transitions. [2021-08-21 12:54:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:54:44,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:44,168 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:44,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 12:54:44,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:44,385 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1830773055, now seen corresponding path program 84 times [2021-08-21 12:54:44,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:44,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037346315] [2021-08-21 12:54:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:44,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:44,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:44,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037346315] [2021-08-21 12:54:44,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037346315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:44,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260080859] [2021-08-21 12:54:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:54:44,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:44,971 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:44,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:54:51,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:54:51,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:54:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:51,818 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 12:54:51,818 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 41 treesize of output 30 [2021-08-21 12:54:51,924 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:54:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-08-21 12:54:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:52,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260080859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:52,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:52,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-08-21 12:54:52,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995913834] [2021-08-21 12:54:52,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:54:52,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:52,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:54:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:54:52,115 INFO L87 Difference]: Start difference. First operand 8540 states and 25917 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:54:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:55,270 INFO L93 Difference]: Finished difference Result 12741 states and 37723 transitions. [2021-08-21 12:54:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:54:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:54:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:55,292 INFO L225 Difference]: With dead ends: 12741 [2021-08-21 12:54:55,292 INFO L226 Difference]: Without dead ends: 12464 [2021-08-21 12:54:55,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2581.0ms TimeCoverageRelationStatistics Valid=580, Invalid=5426, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 12:54:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12464 states. [2021-08-21 12:54:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12464 to 8609. [2021-08-21 12:54:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 3.0340381040892193) internal successors, (26117), 8608 states have internal predecessors, (26117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 26117 transitions. [2021-08-21 12:54:55,433 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 26117 transitions. Word has length 37 [2021-08-21 12:54:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:55,433 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 26117 transitions. [2021-08-21 12:54:55,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:54:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 26117 transitions. [2021-08-21 12:54:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:54:55,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:55,445 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:55,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:54:55,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:55,665 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -906117319, now seen corresponding path program 85 times [2021-08-21 12:54:55,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:55,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241432986] [2021-08-21 12:54:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:55,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:56,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241432986] [2021-08-21 12:54:56,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241432986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090489733] [2021-08-21 12:54:56,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:54:56,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:56,197 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:56,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:55:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:55:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:03,290 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:03,290 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 27 treesize of output 15 [2021-08-21 12:55:03,622 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:03,622 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 29 treesize of output 17 [2021-08-21 12:55:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:03,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090489733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:03,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:03,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:55:03,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668122058] [2021-08-21 12:55:03,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:55:03,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:55:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:55:03,976 INFO L87 Difference]: Start difference. First operand 8609 states and 26117 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:08,289 INFO L93 Difference]: Finished difference Result 12962 states and 38491 transitions. [2021-08-21 12:55:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:55:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:55:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:08,314 INFO L225 Difference]: With dead ends: 12962 [2021-08-21 12:55:08,315 INFO L226 Difference]: Without dead ends: 12780 [2021-08-21 12:55:08,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 3097.5ms TimeCoverageRelationStatistics Valid=539, Invalid=6103, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:55:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2021-08-21 12:55:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 8702. [2021-08-21 12:55:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8702 states, 8701 states have (on average 3.032639926445236) internal successors, (26387), 8701 states have internal predecessors, (26387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8702 states to 8702 states and 26387 transitions. [2021-08-21 12:55:08,468 INFO L78 Accepts]: Start accepts. Automaton has 8702 states and 26387 transitions. Word has length 37 [2021-08-21 12:55:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 8702 states and 26387 transitions. [2021-08-21 12:55:08,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8702 states and 26387 transitions. [2021-08-21 12:55:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:55:08,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:08,479 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:08,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:08,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 12:55:08,693 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash 790188921, now seen corresponding path program 86 times [2021-08-21 12:55:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:08,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689694006] [2021-08-21 12:55:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:08,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:09,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689694006] [2021-08-21 12:55:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689694006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021040432] [2021-08-21 12:55:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:09,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:09,203 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:09,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:55:15,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:15,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:55:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:16,156 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:16,157 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 27 treesize of output 15 [2021-08-21 12:55:16,465 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:16,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-21 12:55:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:16,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021040432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:16,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:16,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:55:16,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855970320] [2021-08-21 12:55:16,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:55:16,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:55:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:55:16,769 INFO L87 Difference]: Start difference. First operand 8702 states and 26387 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:19,055 INFO L93 Difference]: Finished difference Result 10226 states and 30869 transitions. [2021-08-21 12:55:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:55:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:55:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:19,076 INFO L225 Difference]: With dead ends: 10226 [2021-08-21 12:55:19,076 INFO L226 Difference]: Without dead ends: 10062 [2021-08-21 12:55:19,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1637.0ms TimeCoverageRelationStatistics Valid=216, Invalid=3206, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:55:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10062 states. [2021-08-21 12:55:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10062 to 8690. [2021-08-21 12:55:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8690 states, 8689 states have (on average 3.033490620324548) internal successors, (26358), 8689 states have internal predecessors, (26358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8690 states to 8690 states and 26358 transitions. [2021-08-21 12:55:19,207 INFO L78 Accepts]: Start accepts. Automaton has 8690 states and 26358 transitions. Word has length 37 [2021-08-21 12:55:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:19,207 INFO L470 AbstractCegarLoop]: Abstraction has 8690 states and 26358 transitions. [2021-08-21 12:55:19,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8690 states and 26358 transitions. [2021-08-21 12:55:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:55:19,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:19,219 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:19,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:55:19,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:19,445 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 888596559, now seen corresponding path program 87 times [2021-08-21 12:55:19,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:19,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739356836] [2021-08-21 12:55:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:19,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:19,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:19,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739356836] [2021-08-21 12:55:19,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739356836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:19,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308264128] [2021-08-21 12:55:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:19,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:19,860 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:19,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:55:26,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:55:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:55:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:26,875 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-21 12:55:27,250 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:27,251 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 30 treesize of output 18 [2021-08-21 12:55:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308264128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:27,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:27,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:55:27,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224327550] [2021-08-21 12:55:27,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:55:27,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:55:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:55:27,481 INFO L87 Difference]: Start difference. First operand 8690 states and 26358 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:30,010 INFO L93 Difference]: Finished difference Result 10566 states and 31843 transitions. [2021-08-21 12:55:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:55:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:55:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:30,029 INFO L225 Difference]: With dead ends: 10566 [2021-08-21 12:55:30,029 INFO L226 Difference]: Without dead ends: 10317 [2021-08-21 12:55:30,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1788.0ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:55:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10317 states. [2021-08-21 12:55:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10317 to 8669. [2021-08-21 12:55:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8669 states, 8668 states have (on average 3.03322565759114) internal successors, (26292), 8668 states have internal predecessors, (26292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8669 states to 8669 states and 26292 transitions. [2021-08-21 12:55:30,173 INFO L78 Accepts]: Start accepts. Automaton has 8669 states and 26292 transitions. Word has length 37 [2021-08-21 12:55:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 8669 states and 26292 transitions. [2021-08-21 12:55:30,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8669 states and 26292 transitions. [2021-08-21 12:55:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:55:30,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:30,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:30,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:55:30,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:30,401 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash -318274591, now seen corresponding path program 88 times [2021-08-21 12:55:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:30,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186183987] [2021-08-21 12:55:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:30,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:30,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:30,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186183987] [2021-08-21 12:55:30,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186183987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:30,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845498881] [2021-08-21 12:55:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:55:30,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:30,923 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:30,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:55:37,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:55:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:55:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:37,945 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:37,946 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 27 treesize of output 15 [2021-08-21 12:55:38,285 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:38,285 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 30 treesize of output 18 [2021-08-21 12:55:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:38,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845498881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:38,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:38,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:55:38,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335569774] [2021-08-21 12:55:38,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:55:38,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:55:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:55:38,596 INFO L87 Difference]: Start difference. First operand 8669 states and 26292 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:41,321 INFO L93 Difference]: Finished difference Result 10644 states and 32123 transitions. [2021-08-21 12:55:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:55:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:55:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:41,344 INFO L225 Difference]: With dead ends: 10644 [2021-08-21 12:55:41,344 INFO L226 Difference]: Without dead ends: 10416 [2021-08-21 12:55:41,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1834.1ms TimeCoverageRelationStatistics Valid=211, Invalid=2981, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:55:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10416 states. [2021-08-21 12:55:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10416 to 8612. [2021-08-21 12:55:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8612 states, 8611 states have (on average 3.0361165950528393) internal successors, (26144), 8611 states have internal predecessors, (26144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8612 states to 8612 states and 26144 transitions. [2021-08-21 12:55:41,516 INFO L78 Accepts]: Start accepts. Automaton has 8612 states and 26144 transitions. Word has length 37 [2021-08-21 12:55:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:41,516 INFO L470 AbstractCegarLoop]: Abstraction has 8612 states and 26144 transitions. [2021-08-21 12:55:41,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8612 states and 26144 transitions. [2021-08-21 12:55:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:55:41,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:41,528 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:41,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 12:55:41,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:41,741 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1573168241, now seen corresponding path program 89 times [2021-08-21 12:55:41,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:41,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003184214] [2021-08-21 12:55:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:41,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:42,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:42,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003184214] [2021-08-21 12:55:42,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003184214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:42,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610749920] [2021-08-21 12:55:42,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:55:42,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:42,286 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:42,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:55:49,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:55:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:55:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:49,697 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:49,697 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 33 [2021-08-21 12:55:49,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:55:49,778 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 29 treesize of output 17 [2021-08-21 12:55:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610749920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:49,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2021-08-21 12:55:49,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432922726] [2021-08-21 12:55:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:55:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:55:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:55:49,914 INFO L87 Difference]: Start difference. First operand 8612 states and 26144 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:55:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:52,185 INFO L93 Difference]: Finished difference Result 12751 states and 37712 transitions. [2021-08-21 12:55:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:55:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 37 [2021-08-21 12:55:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:52,209 INFO L225 Difference]: With dead ends: 12751 [2021-08-21 12:55:52,209 INFO L226 Difference]: Without dead ends: 12474 [2021-08-21 12:55:52,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1770.7ms TimeCoverageRelationStatistics Valid=500, Invalid=4330, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:55:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12474 states. [2021-08-21 12:55:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12474 to 8774. [2021-08-21 12:55:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8774 states, 8773 states have (on average 3.0344238002963637) internal successors, (26621), 8773 states have internal predecessors, (26621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8774 states to 8774 states and 26621 transitions. [2021-08-21 12:55:52,396 INFO L78 Accepts]: Start accepts. Automaton has 8774 states and 26621 transitions. Word has length 37 [2021-08-21 12:55:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:52,396 INFO L470 AbstractCegarLoop]: Abstraction has 8774 states and 26621 transitions. [2021-08-21 12:55:52,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 12:55:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8774 states and 26621 transitions. [2021-08-21 12:55:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:55:52,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:52,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:52,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:55:52,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:52,621 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1144407213, now seen corresponding path program 90 times [2021-08-21 12:55:52,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:52,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863485854] [2021-08-21 12:55:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:52,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:53,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:53,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863485854] [2021-08-21 12:55:53,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863485854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:53,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923268798] [2021-08-21 12:55:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:53,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:53,229 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:53,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:55:59,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:55:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:55:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:00,560 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:00,560 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 27 treesize of output 15 [2021-08-21 12:56:00,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:00,847 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 31 treesize of output 19 [2021-08-21 12:56:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:01,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923268798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:01,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:01,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:56:01,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975524191] [2021-08-21 12:56:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:56:01,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:56:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:56:01,174 INFO L87 Difference]: Start difference. First operand 8774 states and 26621 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:56:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:03,796 INFO L93 Difference]: Finished difference Result 13217 states and 39286 transitions. [2021-08-21 12:56:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:56:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:56:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:03,818 INFO L225 Difference]: With dead ends: 13217 [2021-08-21 12:56:03,818 INFO L226 Difference]: Without dead ends: 13035 [2021-08-21 12:56:03,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 2266.0ms TimeCoverageRelationStatistics Valid=668, Invalid=5974, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:56:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13035 states. [2021-08-21 12:56:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13035 to 8828. [2021-08-21 12:56:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8828 states, 8827 states have (on average 3.0319474340092896) internal successors, (26763), 8827 states have internal predecessors, (26763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8828 states to 8828 states and 26763 transitions. [2021-08-21 12:56:03,962 INFO L78 Accepts]: Start accepts. Automaton has 8828 states and 26763 transitions. Word has length 37 [2021-08-21 12:56:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:03,962 INFO L470 AbstractCegarLoop]: Abstraction has 8828 states and 26763 transitions. [2021-08-21 12:56:03,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:56:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8828 states and 26763 transitions. [2021-08-21 12:56:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:56:03,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:03,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:04,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:04,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:56:04,189 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1454253843, now seen corresponding path program 91 times [2021-08-21 12:56:04,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:04,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460574874] [2021-08-21 12:56:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:04,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:04,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:04,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460574874] [2021-08-21 12:56:04,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460574874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:04,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4498629] [2021-08-21 12:56:04,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:56:04,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:04,562 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:04,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:56:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:56:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:11,833 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:56:12,151 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:12,152 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 29 treesize of output 17 [2021-08-21 12:56:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:12,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4498629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:12,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:12,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:56:12,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158729170] [2021-08-21 12:56:12,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:12,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:12,454 INFO L87 Difference]: Start difference. First operand 8828 states and 26763 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:14,906 INFO L93 Difference]: Finished difference Result 9968 states and 30032 transitions. [2021-08-21 12:56:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:56:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:56:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:14,924 INFO L225 Difference]: With dead ends: 9968 [2021-08-21 12:56:14,925 INFO L226 Difference]: Without dead ends: 9801 [2021-08-21 12:56:14,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1639.1ms TimeCoverageRelationStatistics Valid=214, Invalid=3092, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:56:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-08-21 12:56:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 8825. [2021-08-21 12:56:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8825 states, 8824 states have (on average 3.0320716228467814) internal successors, (26755), 8824 states have internal predecessors, (26755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8825 states to 8825 states and 26755 transitions. [2021-08-21 12:56:15,050 INFO L78 Accepts]: Start accepts. Automaton has 8825 states and 26755 transitions. Word has length 37 [2021-08-21 12:56:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:15,050 INFO L470 AbstractCegarLoop]: Abstraction has 8825 states and 26755 transitions. [2021-08-21 12:56:15,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8825 states and 26755 transitions. [2021-08-21 12:56:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:56:15,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:15,061 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:15,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:56:15,287 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1096349447, now seen corresponding path program 92 times [2021-08-21 12:56:15,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:15,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990723179] [2021-08-21 12:56:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:15,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:15,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990723179] [2021-08-21 12:56:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990723179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:15,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650696948] [2021-08-21 12:56:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:56:15,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:15,763 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:56:22,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:56:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:56:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:22,969 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:22,969 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 27 treesize of output 15 [2021-08-21 12:56:23,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:23,318 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 29 treesize of output 17 [2021-08-21 12:56:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650696948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:23,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:23,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:56:23,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427547291] [2021-08-21 12:56:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:23,724 INFO L87 Difference]: Start difference. First operand 8825 states and 26755 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:26,349 INFO L93 Difference]: Finished difference Result 10160 states and 30619 transitions. [2021-08-21 12:56:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:56:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:56:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:26,369 INFO L225 Difference]: With dead ends: 10160 [2021-08-21 12:56:26,370 INFO L226 Difference]: Without dead ends: 9996 [2021-08-21 12:56:26,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1817.3ms TimeCoverageRelationStatistics Valid=208, Invalid=3098, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:56:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9996 states. [2021-08-21 12:56:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9996 to 8846. [2021-08-21 12:56:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8846 states, 8845 states have (on average 3.031656302996043) internal successors, (26815), 8845 states have internal predecessors, (26815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8846 states to 8846 states and 26815 transitions. [2021-08-21 12:56:26,508 INFO L78 Accepts]: Start accepts. Automaton has 8846 states and 26815 transitions. Word has length 37 [2021-08-21 12:56:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:26,508 INFO L470 AbstractCegarLoop]: Abstraction has 8846 states and 26815 transitions. [2021-08-21 12:56:26,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8846 states and 26815 transitions. [2021-08-21 12:56:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:56:26,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:26,521 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:26,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:26,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:26,739 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1084363709, now seen corresponding path program 93 times [2021-08-21 12:56:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581204302] [2021-08-21 12:56:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:26,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:27,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:27,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581204302] [2021-08-21 12:56:27,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581204302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:27,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788825186] [2021-08-21 12:56:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:56:27,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:27,290 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:27,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:56:34,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:56:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:56:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:34,720 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:34,720 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 27 treesize of output 15 [2021-08-21 12:56:35,108 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:35,109 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 30 treesize of output 18 [2021-08-21 12:56:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:35,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788825186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:35,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:35,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:56:35,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909803962] [2021-08-21 12:56:35,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:35,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:35,429 INFO L87 Difference]: Start difference. First operand 8846 states and 26815 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:38,073 INFO L93 Difference]: Finished difference Result 10041 states and 30317 transitions. [2021-08-21 12:56:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:56:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:56:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:38,094 INFO L225 Difference]: With dead ends: 10041 [2021-08-21 12:56:38,094 INFO L226 Difference]: Without dead ends: 9864 [2021-08-21 12:56:38,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1714.7ms TimeCoverageRelationStatistics Valid=204, Invalid=3102, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:56:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9864 states. [2021-08-21 12:56:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9864 to 8891. [2021-08-21 12:56:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8891 states, 8890 states have (on average 3.032508436445444) internal successors, (26959), 8890 states have internal predecessors, (26959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 26959 transitions. [2021-08-21 12:56:38,222 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 26959 transitions. Word has length 37 [2021-08-21 12:56:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 8891 states and 26959 transitions. [2021-08-21 12:56:38,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 26959 transitions. [2021-08-21 12:56:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:56:38,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:38,236 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:38,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:38,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:38,465 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 61168151, now seen corresponding path program 94 times [2021-08-21 12:56:38,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:38,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062910086] [2021-08-21 12:56:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:38,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:39,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:39,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062910086] [2021-08-21 12:56:39,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062910086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:39,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880269213] [2021-08-21 12:56:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:39,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:39,044 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:39,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:56:45,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:56:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:46,155 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:46,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:56:46,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:46,471 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 29 treesize of output 17 [2021-08-21 12:56:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:46,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880269213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:46,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:46,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:56:46,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17092453] [2021-08-21 12:56:46,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:46,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:46,871 INFO L87 Difference]: Start difference. First operand 8891 states and 26959 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:49,706 INFO L93 Difference]: Finished difference Result 10334 states and 31174 transitions. [2021-08-21 12:56:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:56:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:56:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:49,724 INFO L225 Difference]: With dead ends: 10334 [2021-08-21 12:56:49,724 INFO L226 Difference]: Without dead ends: 10170 [2021-08-21 12:56:49,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1971.9ms TimeCoverageRelationStatistics Valid=220, Invalid=3202, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:56:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-08-21 12:56:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 8885. [2021-08-21 12:56:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8885 states, 8884 states have (on average 3.0327555155335433) internal successors, (26943), 8884 states have internal predecessors, (26943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8885 states to 8885 states and 26943 transitions. [2021-08-21 12:56:49,846 INFO L78 Accepts]: Start accepts. Automaton has 8885 states and 26943 transitions. Word has length 37 [2021-08-21 12:56:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:49,846 INFO L470 AbstractCegarLoop]: Abstraction has 8885 states and 26943 transitions. [2021-08-21 12:56:49,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8885 states and 26943 transitions. [2021-08-21 12:56:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:56:49,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:49,857 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:49,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:50,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 12:56:50,073 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2119545005, now seen corresponding path program 95 times [2021-08-21 12:56:50,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:50,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604183791] [2021-08-21 12:56:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:50,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:50,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:50,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604183791] [2021-08-21 12:56:50,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604183791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:50,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269378507] [2021-08-21 12:56:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:50,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:50,464 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:50,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:56:57,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:56:57,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:56:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:57,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:57,804 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 27 treesize of output 15 [2021-08-21 12:56:58,109 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:56:58,110 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 32 treesize of output 20 [2021-08-21 12:56:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269378507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:58,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:58,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:56:58,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072001819] [2021-08-21 12:56:58,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:56:58,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:56:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:56:58,364 INFO L87 Difference]: Start difference. First operand 8885 states and 26943 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:00,160 INFO L93 Difference]: Finished difference Result 10377 states and 31331 transitions. [2021-08-21 12:57:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:57:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:57:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:00,178 INFO L225 Difference]: With dead ends: 10377 [2021-08-21 12:57:00,178 INFO L226 Difference]: Without dead ends: 10184 [2021-08-21 12:57:00,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1347.0ms TimeCoverageRelationStatistics Valid=210, Invalid=2760, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:57:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-08-21 12:57:00,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 8943. [2021-08-21 12:57:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8943 states, 8942 states have (on average 3.0324312234399464) internal successors, (27116), 8942 states have internal predecessors, (27116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8943 states to 8943 states and 27116 transitions. [2021-08-21 12:57:00,300 INFO L78 Accepts]: Start accepts. Automaton has 8943 states and 27116 transitions. Word has length 37 [2021-08-21 12:57:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:00,300 INFO L470 AbstractCegarLoop]: Abstraction has 8943 states and 27116 transitions. [2021-08-21 12:57:00,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8943 states and 27116 transitions. [2021-08-21 12:57:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:57:00,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:00,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:00,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:00,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:00,537 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1797143319, now seen corresponding path program 96 times [2021-08-21 12:57:00,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:00,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686139888] [2021-08-21 12:57:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:00,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:01,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:01,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686139888] [2021-08-21 12:57:01,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686139888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:01,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871120426] [2021-08-21 12:57:01,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:01,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:01,081 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:01,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:57:08,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:57:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:08,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:57:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:08,625 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:57:08,890 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:08,890 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 29 treesize of output 17 [2021-08-21 12:57:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:09,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871120426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:09,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:09,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-08-21 12:57:09,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369891947] [2021-08-21 12:57:09,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:57:09,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:57:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:57:09,233 INFO L87 Difference]: Start difference. First operand 8943 states and 27116 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:57:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:12,305 INFO L93 Difference]: Finished difference Result 13736 states and 40981 transitions. [2021-08-21 12:57:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:57:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 37 [2021-08-21 12:57:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:12,331 INFO L225 Difference]: With dead ends: 13736 [2021-08-21 12:57:12,331 INFO L226 Difference]: Without dead ends: 13554 [2021-08-21 12:57:12,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 2153.1ms TimeCoverageRelationStatistics Valid=529, Invalid=6113, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:57:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13554 states. [2021-08-21 12:57:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13554 to 8998. [2021-08-21 12:57:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8998 states, 8997 states have (on average 3.0305657441369345) internal successors, (27266), 8997 states have internal predecessors, (27266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8998 states to 8998 states and 27266 transitions. [2021-08-21 12:57:12,489 INFO L78 Accepts]: Start accepts. Automaton has 8998 states and 27266 transitions. Word has length 37 [2021-08-21 12:57:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:12,489 INFO L470 AbstractCegarLoop]: Abstraction has 8998 states and 27266 transitions. [2021-08-21 12:57:12,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 12:57:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8998 states and 27266 transitions. [2021-08-21 12:57:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:57:12,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:12,500 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:12,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:12,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:57:12,719 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash -100837079, now seen corresponding path program 97 times [2021-08-21 12:57:12,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:12,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297245553] [2021-08-21 12:57:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:12,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:13,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:13,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297245553] [2021-08-21 12:57:13,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297245553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:13,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780852720] [2021-08-21 12:57:13,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:13,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:13,368 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:57:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:57:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:20,824 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:57:21,147 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:21,147 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 29 treesize of output 17 [2021-08-21 12:57:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780852720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:21,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:57:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314423236] [2021-08-21 12:57:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:57:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:57:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:57:21,577 INFO L87 Difference]: Start difference. First operand 8998 states and 27266 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:24,533 INFO L93 Difference]: Finished difference Result 10343 states and 31194 transitions. [2021-08-21 12:57:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:57:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:57:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:24,573 INFO L225 Difference]: With dead ends: 10343 [2021-08-21 12:57:24,573 INFO L226 Difference]: Without dead ends: 10179 [2021-08-21 12:57:24,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1952.6ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:57:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-08-21 12:57:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 8999. [2021-08-21 12:57:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 3.0307846188041787) internal successors, (27271), 8998 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 27271 transitions. [2021-08-21 12:57:24,699 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 27271 transitions. Word has length 37 [2021-08-21 12:57:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:24,699 INFO L470 AbstractCegarLoop]: Abstraction has 8999 states and 27271 transitions. [2021-08-21 12:57:24,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 27271 transitions. [2021-08-21 12:57:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:57:24,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:24,712 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:24,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:57:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:57:24,919 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2013417061, now seen corresponding path program 98 times [2021-08-21 12:57:24,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:24,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710747185] [2021-08-21 12:57:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:24,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:25,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710747185] [2021-08-21 12:57:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710747185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999438153] [2021-08-21 12:57:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:25,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:25,477 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:25,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:57:32,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:32,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:57:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:33,268 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:33,268 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 27 treesize of output 15 [2021-08-21 12:57:33,648 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:33,648 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 30 treesize of output 18 [2021-08-21 12:57:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:33,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999438153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:33,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:33,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:57:33,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849483880] [2021-08-21 12:57:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:57:33,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:57:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:57:33,903 INFO L87 Difference]: Start difference. First operand 8999 states and 27271 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:36,288 INFO L93 Difference]: Finished difference Result 10464 states and 31632 transitions. [2021-08-21 12:57:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:57:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:57:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:36,307 INFO L225 Difference]: With dead ends: 10464 [2021-08-21 12:57:36,307 INFO L226 Difference]: Without dead ends: 10290 [2021-08-21 12:57:36,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1749.2ms TimeCoverageRelationStatistics Valid=217, Invalid=3205, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:57:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2021-08-21 12:57:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 9011. [2021-08-21 12:57:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 3.0310765815760266) internal successors, (27310), 9010 states have internal predecessors, (27310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 27310 transitions. [2021-08-21 12:57:36,435 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 27310 transitions. Word has length 37 [2021-08-21 12:57:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:36,435 INFO L470 AbstractCegarLoop]: Abstraction has 9011 states and 27310 transitions. [2021-08-21 12:57:36,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 27310 transitions. [2021-08-21 12:57:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:57:36,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:36,446 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:36,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:36,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 12:57:36,673 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash 806545911, now seen corresponding path program 99 times [2021-08-21 12:57:36,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:36,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838662929] [2021-08-21 12:57:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:36,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:37,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:37,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838662929] [2021-08-21 12:57:37,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838662929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:37,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653629769] [2021-08-21 12:57:37,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:37,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:37,265 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:37,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:57:44,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:57:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:57:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:44,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:44,902 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 27 treesize of output 15 [2021-08-21 12:57:45,295 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:45,295 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 30 treesize of output 18 [2021-08-21 12:57:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:45,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653629769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:45,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:45,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:57:45,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809638496] [2021-08-21 12:57:45,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:57:45,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:57:45,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:57:45,622 INFO L87 Difference]: Start difference. First operand 9011 states and 27310 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:48,292 INFO L93 Difference]: Finished difference Result 10630 states and 32142 transitions. [2021-08-21 12:57:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:57:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:57:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:48,309 INFO L225 Difference]: With dead ends: 10630 [2021-08-21 12:57:48,309 INFO L226 Difference]: Without dead ends: 10443 [2021-08-21 12:57:48,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1772.5ms TimeCoverageRelationStatistics Valid=198, Invalid=2882, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:57:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-08-21 12:57:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9022. [2021-08-21 12:57:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.03114953996231) internal successors, (27344), 9021 states have internal predecessors, (27344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 27344 transitions. [2021-08-21 12:57:48,424 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 27344 transitions. Word has length 37 [2021-08-21 12:57:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:48,424 INFO L470 AbstractCegarLoop]: Abstraction has 9022 states and 27344 transitions. [2021-08-21 12:57:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 27344 transitions. [2021-08-21 12:57:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:57:48,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:48,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:48,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:48,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:48,655 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash 30159939, now seen corresponding path program 100 times [2021-08-21 12:57:48,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:48,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723168159] [2021-08-21 12:57:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:48,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:49,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:49,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723168159] [2021-08-21 12:57:49,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723168159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:49,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367585625] [2021-08-21 12:57:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:49,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:49,226 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:49,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:57:56,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:57:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:57,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:57,253 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 27 treesize of output 15 [2021-08-21 12:57:57,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:57:57,660 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 30 treesize of output 18 [2021-08-21 12:57:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:58,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367585625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:58,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:58,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-21 12:57:58,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792149331] [2021-08-21 12:57:58,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:57:58,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:57:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:57:58,001 INFO L87 Difference]: Start difference. First operand 9022 states and 27344 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:00,687 INFO L93 Difference]: Finished difference Result 10225 states and 30885 transitions. [2021-08-21 12:58:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:58:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:58:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:00,703 INFO L225 Difference]: With dead ends: 10225 [2021-08-21 12:58:00,704 INFO L226 Difference]: Without dead ends: 10013 [2021-08-21 12:58:00,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1931.9ms TimeCoverageRelationStatistics Valid=192, Invalid=2888, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:58:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2021-08-21 12:58:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 8992. [2021-08-21 12:58:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8992 states, 8991 states have (on average 3.033366700033367) internal successors, (27273), 8991 states have internal predecessors, (27273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8992 states to 8992 states and 27273 transitions. [2021-08-21 12:58:00,825 INFO L78 Accepts]: Start accepts. Automaton has 8992 states and 27273 transitions. Word has length 37 [2021-08-21 12:58:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:00,825 INFO L470 AbstractCegarLoop]: Abstraction has 8992 states and 27273 transitions. [2021-08-21 12:58:00,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8992 states and 27273 transitions. [2021-08-21 12:58:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:58:00,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:00,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:00,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:01,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:01,065 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1410183093, now seen corresponding path program 101 times [2021-08-21 12:58:01,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:01,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031244647] [2021-08-21 12:58:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:01,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:01,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:01,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031244647] [2021-08-21 12:58:01,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031244647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:01,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548326271] [2021-08-21 12:58:01,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:01,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:01,462 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:01,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:58:08,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:58:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:58:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:09,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:09,374 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 27 treesize of output 15 [2021-08-21 12:58:09,668 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:09,668 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 29 treesize of output 17 [2021-08-21 12:58:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548326271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:09,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:09,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-08-21 12:58:09,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686361049] [2021-08-21 12:58:09,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:58:09,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:58:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:58:09,817 INFO L87 Difference]: Start difference. First operand 8992 states and 27273 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:11,809 INFO L93 Difference]: Finished difference Result 12477 states and 37043 transitions. [2021-08-21 12:58:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:58:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:58:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:11,828 INFO L225 Difference]: With dead ends: 12477 [2021-08-21 12:58:11,828 INFO L226 Difference]: Without dead ends: 12278 [2021-08-21 12:58:11,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1661.9ms TimeCoverageRelationStatistics Valid=511, Invalid=4459, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 12:58:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12278 states. [2021-08-21 12:58:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12278 to 9109. [2021-08-21 12:58:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9109 states, 9108 states have (on average 3.032828282828283) internal successors, (27623), 9108 states have internal predecessors, (27623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9109 states to 9109 states and 27623 transitions. [2021-08-21 12:58:11,957 INFO L78 Accepts]: Start accepts. Automaton has 9109 states and 27623 transitions. Word has length 37 [2021-08-21 12:58:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:11,957 INFO L470 AbstractCegarLoop]: Abstraction has 9109 states and 27623 transitions. [2021-08-21 12:58:11,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9109 states and 27623 transitions. [2021-08-21 12:58:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:58:11,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:11,969 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:12,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:12,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:58:12,191 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash -56766329, now seen corresponding path program 102 times [2021-08-21 12:58:12,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:12,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567863123] [2021-08-21 12:58:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:12,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:12,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567863123] [2021-08-21 12:58:12,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567863123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123966966] [2021-08-21 12:58:12,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:12,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:12,729 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:12,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:58:18,306 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:58:18,306 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:58:19,357 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:58:19,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:19,358 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while executing Executor. [2021-08-21 12:58:19,359 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:58:19,359 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:58:19,359 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:58:19,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:19,364 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:58:19,364 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:58:19,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 12:58:19,366 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:58:19 BasicIcfg [2021-08-21 12:58:19,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:58:19,368 INFO L168 Benchmark]: Toolchain (without parser) took 868222.53 ms. Allocated memory was 127.9 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 107.3 MB in the beginning and 400.3 MB in the end (delta: -293.0 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,375 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 127.9 MB. Free memory was 108.6 MB in the beginning and 108.5 MB in the end (delta: 66.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:58:19,375 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 127.9 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,375 INFO L168 Benchmark]: Boogie Preprocessor took 24.93 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 104.8 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,375 INFO L168 Benchmark]: RCFGBuilder took 243.51 ms. Allocated memory was 127.9 MB in the beginning and 162.5 MB in the end (delta: 34.6 MB). Free memory was 104.7 MB in the beginning and 147.1 MB in the end (delta: -42.4 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,375 INFO L168 Benchmark]: TraceAbstraction took 867930.39 ms. Allocated memory was 162.5 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 146.5 MB in the beginning and 400.3 MB in the end (delta: -253.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,376 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 0.09 ms. Allocated memory is still 127.9 MB. Free memory was 108.6 MB in the beginning and 108.5 MB in the end (delta: 66.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 127.9 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.93 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 104.8 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 243.51 ms. Allocated memory was 127.9 MB in the beginning and 162.5 MB in the end (delta: 34.6 MB). Free memory was 104.7 MB in the beginning and 147.1 MB in the end (delta: -42.4 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 867930.39 ms. Allocated memory was 162.5 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 146.5 MB in the beginning and 400.3 MB in the end (delta: -253.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 867832.8ms, OverallIterations: 109, TraceHistogramMax: 2, EmptinessCheckTime: 1006.1ms, AutomataDifference: 283395.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19817 SDtfs, 58835 SDslu, 445756 SDs, 0 SdLazy, 307167 SolverSat, 8490 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118577.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8876 GetRequests, 2171 SyntacticMatches, 19 SemanticMatches, 6686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98217 ImplicationChecksByTransitivity, 211094.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9109occurred in iteration=108, InterpolantAutomatonStates: 4910, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11391.3ms AutomataMinimizationTime, 108 MinimizatonAttempts, 225988 StatesRemovedByMinimization, 105 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 556.9ms SsaConstructionTime, 2900.9ms SatisfiabilityAnalysisTime, 166674.3ms InterpolantComputationTime, 7728 NumberOfCodeBlocks, 7728 NumberOfCodeBlocksAsserted, 347 NumberOfCheckSat, 7515 ConstructedInterpolants, 49 QuantifiedInterpolants, 175397 SizeOfPredicates, 1111 NumberOfNonLiveVariables, 10585 ConjunctsInSsa, 4239 ConjunctsInUnsatCore, 213 InterpolantComputations, 5 PerfectInterpolantSequences, 41/2837 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