/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/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:37:45,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:37:45,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:37:45,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:37:45,205 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 12:37:45,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:37:45,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:37:45,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:37:45,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:37:45,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:37:45,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:37:45,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:37:45,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:37:45,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:37:45,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:37:45,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:37:45,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:37:45,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:37:45,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:37:45,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:37:45,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:37:45,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:37:45,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:37:45,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:37:45,593 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:37:45,594 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:37:45,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-08-21 12:37:45,612 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-08-21 12:37:45,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:37:45,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:37:45,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:37:45,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:37:45,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:37:45,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:37:45,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:37:45,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:37:45,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:37:45,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:37:45,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:37:45,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:37:45,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:37:45,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/1) ... [2021-08-21 12:37:45,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:37:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:45,721 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 12:37:45,732 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 12:37:45,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:37:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:37:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:37:45,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:37:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:37:45,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:37:45,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:37:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:37:45,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:37:45,761 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 12:37:45,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:37:45,949 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 12:37:45,950 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:37:45,951 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:37:45 BoogieIcfgContainer [2021-08-21 12:37:45,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:37:45,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:37:45,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:37:45,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:37:45,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:37:45" (1/2) ... [2021-08-21 12:37:45,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f70f9e9 and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:37:45, skipping insertion in model container [2021-08-21 12:37:45,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:37:45" (2/2) ... [2021-08-21 12:37:45,956 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-08-21 12:37:45,959 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:37:45,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:37:45,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:37:45,959 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:37:46,012 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:37:46,051 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:37:46,058 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 12:37:46,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:37:46,065 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-08-21 12:37:46,077 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:37:46,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:46,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:46,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1684811367, now seen corresponding path program 1 times [2021-08-21 12:37:46,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:46,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462470644] [2021-08-21 12:37:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:46,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:46,224 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 12:37:46,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:46,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462470644] [2021-08-21 12:37:46,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462470644] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:37:46,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:37:46,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:37:46,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831347588] [2021-08-21 12:37:46,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:37:46,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:37:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:46,246 INFO L87 Difference]: Start difference. First operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:46,266 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-08-21 12:37:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:37:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 12:37:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:46,273 INFO L225 Difference]: With dead ends: 54 [2021-08-21 12:37:46,273 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 12:37:46,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 12:37:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-21 12:37:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-08-21 12:37:46,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-08-21 12:37:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-08-21 12:37:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-08-21 12:37:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:37:46,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:46,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:37:46,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 582751290, now seen corresponding path program 1 times [2021-08-21 12:37:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:46,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625081192] [2021-08-21 12:37:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:46,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:46,322 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 12:37:46,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:46,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625081192] [2021-08-21 12:37:46,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625081192] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:37:46,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:37:46,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:37:46,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684799615] [2021-08-21 12:37:46,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:37:46,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:37:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:46,325 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:46,331 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-08-21 12:37:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:37:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:37:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:46,332 INFO L225 Difference]: With dead ends: 37 [2021-08-21 12:37:46,332 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 12:37:46,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 12:37:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 12:37:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-08-21 12:37:46,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-08-21 12:37:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:46,337 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-08-21 12:37:46,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-08-21 12:37:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:37:46,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:46,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:46,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:37:46,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 618632506, now seen corresponding path program 1 times [2021-08-21 12:37:46,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:46,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313779160] [2021-08-21 12:37:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:46,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:46,421 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 12:37:46,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:46,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313779160] [2021-08-21 12:37:46,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313779160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:46,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869742493] [2021-08-21 12:37:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:46,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:46,432 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 12:37:46,433 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 12:37:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:37:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:37:46,680 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 12:37:46,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869742493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:46,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:46,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:37:46,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342902079] [2021-08-21 12:37:46,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:37:46,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:37:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:37:46,691 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 12:37:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:46,747 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-08-21 12:37:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:37:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 12:37:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:46,751 INFO L225 Difference]: With dead ends: 67 [2021-08-21 12:37:46,751 INFO L226 Difference]: Without dead ends: 56 [2021-08-21 12:37:46,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:37:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-21 12:37:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-21 12:37:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-08-21 12:37:46,758 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-08-21 12:37:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:46,758 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-08-21 12:37:46,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 12:37:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-08-21 12:37:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:37:46,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:46,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:46,793 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 12:37:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:46,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:46,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1374832358, now seen corresponding path program 1 times [2021-08-21 12:37:46,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:46,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891715865] [2021-08-21 12:37:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:46,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:37:46,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:46,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891715865] [2021-08-21 12:37:46,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891715865] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:37:46,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:37:46,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:37:46,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207332092] [2021-08-21 12:37:46,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:37:46,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:37:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:46,994 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 12:37:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:46,999 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-08-21 12:37:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:37:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 12:37:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:47,000 INFO L225 Difference]: With dead ends: 52 [2021-08-21 12:37:47,000 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 12:37:47,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:37:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 12:37:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-08-21 12:37:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-08-21 12:37:47,004 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-08-21 12:37:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-08-21 12:37:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 12:37:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-08-21 12:37:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:37:47,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:47,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:47,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:37:47,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2010811493, now seen corresponding path program 2 times [2021-08-21 12:37:47,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:47,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939150002] [2021-08-21 12:37:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:47,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:47,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:47,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939150002] [2021-08-21 12:37:47,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939150002] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:37:47,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:37:47,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:37:47,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985185781] [2021-08-21 12:37:47,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:37:47,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:37:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:37:47,037 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:47,049 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-08-21 12:37:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:37:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:37:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:47,051 INFO L225 Difference]: With dead ends: 116 [2021-08-21 12:37:47,051 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 12:37:47,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:37:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 12:37:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-08-21 12:37:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-08-21 12:37:47,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-08-21 12:37:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-08-21 12:37:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-08-21 12:37:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:37:47,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:47,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:47,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:37:47,059 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2043548103, now seen corresponding path program 3 times [2021-08-21 12:37:47,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:47,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085854322] [2021-08-21 12:37:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:47,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:37:47,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:47,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085854322] [2021-08-21 12:37:47,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085854322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:47,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940270397] [2021-08-21 12:37:47,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:37:47,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:47,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:47,080 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 12:37:47,081 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 12:37:47,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:37:47,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:37:47,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:37:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940270397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:47,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:47,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:37:47,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507751549] [2021-08-21 12:37:47,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:37:47,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:37:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:37:47,167 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:47,175 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-08-21 12:37:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:37:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:37:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:47,176 INFO L225 Difference]: With dead ends: 118 [2021-08-21 12:37:47,176 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 12:37:47,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:37:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 12:37:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-08-21 12:37:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-08-21 12:37:47,182 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-08-21 12:37:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-08-21 12:37:47,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-08-21 12:37:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:37:47,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:47,183 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:47,202 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 12:37:47,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 12:37:47,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash 257954329, now seen corresponding path program 1 times [2021-08-21 12:37:47,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:47,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209182466] [2021-08-21 12:37:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:47,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:47,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209182466] [2021-08-21 12:37:47,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209182466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330718361] [2021-08-21 12:37:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:47,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:47,645 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 12:37:47,646 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 12:37:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:37:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:48,004 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:37:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-21 12:37:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:48,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330718361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:48,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:48,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 12:37:48,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546886530] [2021-08-21 12:37:48,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:37:48,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:37:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:37:48,045 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:48,129 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-08-21 12:37:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:48,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:37:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:48,130 INFO L225 Difference]: With dead ends: 175 [2021-08-21 12:37:48,130 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 12:37:48,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:37:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 12:37:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-08-21 12:37:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-08-21 12:37:48,136 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-08-21 12:37:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:48,148 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-08-21 12:37:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-08-21 12:37:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:37:48,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:48,149 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:48,168 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 12:37:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:48,364 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash -890421551, now seen corresponding path program 2 times [2021-08-21 12:37:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:48,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863415413] [2021-08-21 12:37:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:48,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:48,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:48,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863415413] [2021-08-21 12:37:48,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863415413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:48,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114712559] [2021-08-21 12:37:48,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:37:48,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:48,496 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 12:37:48,558 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 12:37:48,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:37:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:37:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:48,924 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:37:48,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-21 12:37:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:48,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114712559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:48,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:48,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 12:37:48,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713208033] [2021-08-21 12:37:48,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:37:48,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:37:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:37:48,968 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:49,052 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-08-21 12:37:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:37:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:49,053 INFO L225 Difference]: With dead ends: 209 [2021-08-21 12:37:49,053 INFO L226 Difference]: Without dead ends: 190 [2021-08-21 12:37:49,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:37:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-21 12:37:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-08-21 12:37:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-08-21 12:37:49,069 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-08-21 12:37:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:49,069 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-08-21 12:37:49,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-08-21 12:37:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:37:49,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:49,072 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:49,101 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 12:37:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:49,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2067742331, now seen corresponding path program 3 times [2021-08-21 12:37:49,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:49,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588887379] [2021-08-21 12:37:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:49,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:49,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:49,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588887379] [2021-08-21 12:37:49,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588887379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:49,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556787831] [2021-08-21 12:37:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:37:49,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:49,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:49,417 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 12:37:49,418 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 12:37:49,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:37:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:37:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:49,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:37:49,711 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 34 treesize of output 18 [2021-08-21 12:37:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:49,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556787831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:49,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:49,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 12:37:49,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833095423] [2021-08-21 12:37:49,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:37:49,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:37:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:37:49,748 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:49,825 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-08-21 12:37:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:37:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:49,827 INFO L225 Difference]: With dead ends: 180 [2021-08-21 12:37:49,827 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 12:37:49,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:37:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 12:37:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-08-21 12:37:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-08-21 12:37:49,830 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-08-21 12:37:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:49,831 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-08-21 12:37:49,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-08-21 12:37:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:37:49,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:49,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:49,859 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 12:37:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:50,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -985673572, now seen corresponding path program 4 times [2021-08-21 12:37:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:50,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493017017] [2021-08-21 12:37:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:50,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:50,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:50,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493017017] [2021-08-21 12:37:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493017017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:50,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923020450] [2021-08-21 12:37:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:37:50,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:50,099 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 12:37:50,103 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 12:37:50,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:37:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:37:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923020450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:50,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:50,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:37:50,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088470441] [2021-08-21 12:37:50,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:37:50,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:37:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:37:50,274 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 12:37:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:50,291 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-08-21 12:37:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:37:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 23 [2021-08-21 12:37:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:50,292 INFO L225 Difference]: With dead ends: 267 [2021-08-21 12:37:50,293 INFO L226 Difference]: Without dead ends: 262 [2021-08-21 12:37:50,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:37:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-21 12:37:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-08-21 12:37:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-08-21 12:37:50,296 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-08-21 12:37:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:50,296 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-08-21 12:37:50,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 12:37:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-08-21 12:37:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:50,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:50,297 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:50,329 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 12:37:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:50,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1093117114, now seen corresponding path program 5 times [2021-08-21 12:37:50,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:50,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764813895] [2021-08-21 12:37:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:50,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:37:50,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:50,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764813895] [2021-08-21 12:37:50,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764813895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:50,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382880088] [2021-08-21 12:37:50,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:37:50,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:50,717 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 12:37:50,728 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 12:37:50,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:37:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:50,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:51,317 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382880088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:51,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 12:37:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923076779] [2021-08-21 12:37:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:37:51,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:37:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:37:51,354 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:51,473 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-08-21 12:37:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:37:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:51,475 INFO L225 Difference]: With dead ends: 337 [2021-08-21 12:37:51,475 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 12:37:51,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 12:37:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-08-21 12:37:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-08-21 12:37:51,479 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-08-21 12:37:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-08-21 12:37:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-08-21 12:37:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:51,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:51,480 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:51,497 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 12:37:51,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:51,694 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -380854990, now seen corresponding path program 6 times [2021-08-21 12:37:51,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:51,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479842333] [2021-08-21 12:37:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:51,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:51,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479842333] [2021-08-21 12:37:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479842333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534544579] [2021-08-21 12:37:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:37:51,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:51,872 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 12:37:51,872 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 12:37:52,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:37:52,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:52,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:52,478 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:52,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534544579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:52,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:52,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:37:52,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062980318] [2021-08-21 12:37:52,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:52,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:52,517 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:52,627 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-08-21 12:37:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:37:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:52,629 INFO L225 Difference]: With dead ends: 375 [2021-08-21 12:37:52,629 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 12:37:52,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 12:37:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-08-21 12:37:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-08-21 12:37:52,633 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-08-21 12:37:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-08-21 12:37:52,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-08-21 12:37:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:52,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:52,634 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:52,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:52,850 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,SelfDestructingSolverStorable11 [2021-08-21 12:37:52,850 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1073760540, now seen corresponding path program 7 times [2021-08-21 12:37:52,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:52,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226118215] [2021-08-21 12:37:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:52,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:53,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:53,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226118215] [2021-08-21 12:37:53,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226118215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:53,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033377031] [2021-08-21 12:37:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:37:53,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:53,058 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 12:37:53,059 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 12:37:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:53,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:53,718 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:53,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:53,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033377031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:53,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:53,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:37:53,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217099887] [2021-08-21 12:37:53,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:53,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:53,752 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:53,875 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-08-21 12:37:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:37:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:53,877 INFO L225 Difference]: With dead ends: 372 [2021-08-21 12:37:53,877 INFO L226 Difference]: Without dead ends: 352 [2021-08-21 12:37:53,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-21 12:37:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-08-21 12:37:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-08-21 12:37:53,882 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-08-21 12:37:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:53,882 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-08-21 12:37:53,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-08-21 12:37:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:53,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:53,882 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:53,899 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 12:37:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:37:54,097 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 82946818, now seen corresponding path program 8 times [2021-08-21 12:37:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:54,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678796818] [2021-08-21 12:37:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:54,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:37:54,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:54,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678796818] [2021-08-21 12:37:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678796818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:54,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909807635] [2021-08-21 12:37:54,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:37:54,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:54,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:54,293 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 12:37:54,294 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 12:37:54,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:37:54,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:54,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:55,002 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:55,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909807635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:55,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:55,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 12:37:55,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528304999] [2021-08-21 12:37:55,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:37:55,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:37:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:37:55,037 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:55,207 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-08-21 12:37:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:37:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:55,209 INFO L225 Difference]: With dead ends: 548 [2021-08-21 12:37:55,209 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:37:55,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:37:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:37:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-08-21 12:37:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-08-21 12:37:55,214 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-08-21 12:37:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-08-21 12:37:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-08-21 12:37:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:55,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:55,215 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:55,234 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 12:37:55,432 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,SelfDestructingSolverStorable13 [2021-08-21 12:37:55,432 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1391025286, now seen corresponding path program 9 times [2021-08-21 12:37:55,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:55,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785576931] [2021-08-21 12:37:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:55,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:55,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:55,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785576931] [2021-08-21 12:37:55,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785576931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:55,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863912925] [2021-08-21 12:37:55,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:37:55,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:55,657 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 12:37:55,658 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 12:37:55,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:37:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:55,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:37:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:56,596 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-08-21 12:37:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 51 [2021-08-21 12:37:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:56,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863912925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:56,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:56,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:37:56,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099995312] [2021-08-21 12:37:56,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:56,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:56,635 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:57,054 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-08-21 12:37:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:37:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:57,056 INFO L225 Difference]: With dead ends: 598 [2021-08-21 12:37:57,056 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 12:37:57,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:37:57,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 12:37:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-08-21 12:37:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-08-21 12:37:57,063 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-08-21 12:37:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:57,063 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-08-21 12:37:57,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-08-21 12:37:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:57,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:57,064 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:57,083 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 12:37:57,281 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,SelfDestructingSolverStorable14 [2021-08-21 12:37:57,282 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash 63590244, now seen corresponding path program 10 times [2021-08-21 12:37:57,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:57,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639910084] [2021-08-21 12:37:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:57,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:57,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:57,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639910084] [2021-08-21 12:37:57,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639910084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:57,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609069878] [2021-08-21 12:37:57,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:37:57,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:57,471 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 12:37:57,472 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 12:37:57,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:37:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:57,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:58,248 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:58,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:58,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609069878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:58,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:58,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:37:58,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192976259] [2021-08-21 12:37:58,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:58,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:58,283 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:58,464 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-08-21 12:37:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:37:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:58,466 INFO L225 Difference]: With dead ends: 470 [2021-08-21 12:37:58,466 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:37:58,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:37:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:37:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-08-21 12:37:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-08-21 12:37:58,474 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-08-21 12:37:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:58,474 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-08-21 12:37:58,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-08-21 12:37:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:58,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:58,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:58,494 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 12:37:58,688 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,SelfDestructingSolverStorable15 [2021-08-21 12:37:58,688 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 915605980, now seen corresponding path program 11 times [2021-08-21 12:37:58,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:58,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773641722] [2021-08-21 12:37:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:58,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:58,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:58,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773641722] [2021-08-21 12:37:58,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773641722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:58,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852943499] [2021-08-21 12:37:58,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:37:58,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:58,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:58,866 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 12:37:58,867 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 12:37:59,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:37:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:59,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:37:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:59,710 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:37:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 12:37:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852943499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:59,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:59,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:37:59,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232000834] [2021-08-21 12:37:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:59,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:59,745 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:59,873 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-08-21 12:37:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:37:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:37:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:59,874 INFO L225 Difference]: With dead ends: 414 [2021-08-21 12:37:59,874 INFO L226 Difference]: Without dead ends: 393 [2021-08-21 12:37:59,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:37:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-21 12:37:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-08-21 12:37:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-08-21 12:37:59,879 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-08-21 12:37:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:59,879 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-08-21 12:37:59,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-08-21 12:37:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:37:59,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:59,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:59,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:00,093 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,SelfDestructingSolverStorable16 [2021-08-21 12:38:00,093 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash 622781848, now seen corresponding path program 12 times [2021-08-21 12:38:00,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:00,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600027655] [2021-08-21 12:38:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:00,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:38:00,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:00,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600027655] [2021-08-21 12:38:00,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600027655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:00,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991179739] [2021-08-21 12:38:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:00,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:00,312 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 12:38:00,334 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 12:38:00,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:38:00,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:00,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:01,131 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:38:01,132 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 59 treesize of output 34 [2021-08-21 12:38:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:01,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991179739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:01,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:01,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-08-21 12:38:01,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442763486] [2021-08-21 12:38:01,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:38:01,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:38:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:38:01,184 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:01,449 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-08-21 12:38:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:38:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:38:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:01,451 INFO L225 Difference]: With dead ends: 610 [2021-08-21 12:38:01,451 INFO L226 Difference]: Without dead ends: 465 [2021-08-21 12:38:01,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:38:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-08-21 12:38:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-08-21 12:38:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-08-21 12:38:01,457 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-08-21 12:38:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:01,457 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-08-21 12:38:01,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-08-21 12:38:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:38:01,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:01,458 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:01,477 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 12:38:01,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:01,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash -851190256, now seen corresponding path program 13 times [2021-08-21 12:38:01,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:01,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496899200] [2021-08-21 12:38:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:01,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:01,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:01,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496899200] [2021-08-21 12:38:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496899200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:01,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933317659] [2021-08-21 12:38:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:01,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:01,867 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 12:38:01,867 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 12:38:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:02,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:02,722 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:38:02,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-21 12:38:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:02,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933317659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:02,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:02,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:38:02,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534826906] [2021-08-21 12:38:02,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:38:02,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:02,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:38:02,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:38:02,757 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:02,952 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-08-21 12:38:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:02,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:38:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:02,954 INFO L225 Difference]: With dead ends: 634 [2021-08-21 12:38:02,954 INFO L226 Difference]: Without dead ends: 581 [2021-08-21 12:38:02,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:38:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-08-21 12:38:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-08-21 12:38:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-08-21 12:38:02,959 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-08-21 12:38:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:02,960 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-08-21 12:38:02,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-08-21 12:38:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:38:02,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:02,960 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:02,993 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 12:38:03,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:03,161 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 603425274, now seen corresponding path program 14 times [2021-08-21 12:38:03,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:03,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898865090] [2021-08-21 12:38:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:03,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:03,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898865090] [2021-08-21 12:38:03,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898865090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560145332] [2021-08-21 12:38:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:03,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:03,362 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 12:38:03,362 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 12:38:03,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:03,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:04,219 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:38:04,219 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 59 treesize of output 34 [2021-08-21 12:38:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560145332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:04,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:04,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:38:04,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151096542] [2021-08-21 12:38:04,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:38:04,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:38:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:38:04,252 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:04,440 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-08-21 12:38:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:38:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:04,442 INFO L225 Difference]: With dead ends: 541 [2021-08-21 12:38:04,442 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 12:38:04,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:38:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 12:38:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-08-21 12:38:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-08-21 12:38:04,448 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-08-21 12:38:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-08-21 12:38:04,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-08-21 12:38:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:38:04,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:04,448 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:04,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:04,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:04,665 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1455441010, now seen corresponding path program 15 times [2021-08-21 12:38:04,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:04,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040843908] [2021-08-21 12:38:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:04,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:04,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:04,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040843908] [2021-08-21 12:38:04,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040843908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:04,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836202169] [2021-08-21 12:38:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:04,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:04,864 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 12:38:04,868 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 12:38:05,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:38:05,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:05,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:05,790 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:38:05,790 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 59 treesize of output 34 [2021-08-21 12:38:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:05,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836202169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:05,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:05,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:38:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457293200] [2021-08-21 12:38:05,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:38:05,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:38:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:38:05,827 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:06,070 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-08-21 12:38:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:38:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:06,072 INFO L225 Difference]: With dead ends: 524 [2021-08-21 12:38:06,072 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:38:06,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:38:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:38:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-08-21 12:38:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-08-21 12:38:06,078 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-08-21 12:38:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:06,078 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-08-21 12:38:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-08-21 12:38:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:38:06,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:06,080 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:06,098 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 12:38:06,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:06,298 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -818373156, now seen corresponding path program 16 times [2021-08-21 12:38:06,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:06,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623652720] [2021-08-21 12:38:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:06,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:06,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623652720] [2021-08-21 12:38:06,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623652720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550889344] [2021-08-21 12:38:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:06,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:06,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:06,490 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 12:38:06,491 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 12:38:07,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:07,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:07,394 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:38:07,394 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 53 treesize of output 25 [2021-08-21 12:38:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:07,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550889344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:07,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:07,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:38:07,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796618795] [2021-08-21 12:38:07,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:38:07,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:38:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:38:07,427 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:07,563 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-08-21 12:38:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:38:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:38:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:07,565 INFO L225 Difference]: With dead ends: 369 [2021-08-21 12:38:07,565 INFO L226 Difference]: Without dead ends: 354 [2021-08-21 12:38:07,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:38:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-21 12:38:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-08-21 12:38:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-08-21 12:38:07,570 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-08-21 12:38:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:07,570 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-08-21 12:38:07,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-08-21 12:38:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:38:07,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:07,570 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:07,588 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 12:38:07,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:07,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash 6216637, now seen corresponding path program 17 times [2021-08-21 12:38:07,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:07,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490004658] [2021-08-21 12:38:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:07,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:07,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:07,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490004658] [2021-08-21 12:38:07,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490004658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780392838] [2021-08-21 12:38:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:07,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:07,824 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 12:38:07,825 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 12:38:08,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:38:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:38:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780392838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:08,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:08,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:38:08,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596246781] [2021-08-21 12:38:08,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:38:08,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:38:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:38:08,501 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:08,519 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-08-21 12:38:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:38:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:38:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:08,520 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:38:08,520 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:38:08,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:38:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:38:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-08-21 12:38:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-08-21 12:38:08,552 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-08-21 12:38:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:08,552 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-08-21 12:38:08,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-08-21 12:38:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:08,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:08,553 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:08,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 12:38:08,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:08,771 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1607383775, now seen corresponding path program 18 times [2021-08-21 12:38:08,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:08,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452141228] [2021-08-21 12:38:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:08,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:38:09,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:09,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452141228] [2021-08-21 12:38:09,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452141228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:09,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589814830] [2021-08-21 12:38:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:09,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:09,044 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 12:38:09,045 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 12:38:09,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:38:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:09,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:10,405 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:10,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589814830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:10,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:10,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 12:38:10,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116736107] [2021-08-21 12:38:10,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:38:10,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:38:10,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:10,442 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:10,677 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-08-21 12:38:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:38:10,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:38:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:10,679 INFO L225 Difference]: With dead ends: 708 [2021-08-21 12:38:10,679 INFO L226 Difference]: Without dead ends: 588 [2021-08-21 12:38:10,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-21 12:38:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-08-21 12:38:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-08-21 12:38:10,685 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-08-21 12:38:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-08-21 12:38:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-08-21 12:38:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:10,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:10,686 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:10,705 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 12:38:10,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:38:10,887 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:10,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1539207641, now seen corresponding path program 19 times [2021-08-21 12:38:10,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:10,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583243620] [2021-08-21 12:38:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:10,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:11,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:11,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583243620] [2021-08-21 12:38:11,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583243620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:11,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278316840] [2021-08-21 12:38:11,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:11,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:11,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:11,214 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 12:38:11,214 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 12:38:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:11,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:11,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:12,597 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:12,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:12,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278316840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:12,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:12,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:12,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921544798] [2021-08-21 12:38:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:12,637 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:12,852 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-08-21 12:38:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:38:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:12,854 INFO L225 Difference]: With dead ends: 810 [2021-08-21 12:38:12,854 INFO L226 Difference]: Without dead ends: 757 [2021-08-21 12:38:12,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-08-21 12:38:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-08-21 12:38:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-08-21 12:38:12,861 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-08-21 12:38:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-08-21 12:38:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-08-21 12:38:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:12,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:12,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:12,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:13,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 12:38:13,080 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash 202404227, now seen corresponding path program 20 times [2021-08-21 12:38:13,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:13,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105269629] [2021-08-21 12:38:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:13,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:13,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:13,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105269629] [2021-08-21 12:38:13,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105269629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:13,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408465148] [2021-08-21 12:38:13,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:13,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:13,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:13,348 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 12:38:13,349 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 12:38:14,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:14,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:14,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:14,767 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:14,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:14,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408465148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:14,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:14,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:14,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963627501] [2021-08-21 12:38:14,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:14,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:14,807 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:15,067 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-08-21 12:38:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:15,070 INFO L225 Difference]: With dead ends: 880 [2021-08-21 12:38:15,070 INFO L226 Difference]: Without dead ends: 824 [2021-08-21 12:38:15,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:38:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-08-21 12:38:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-08-21 12:38:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-08-21 12:38:15,077 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-08-21 12:38:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-08-21 12:38:15,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-08-21 12:38:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:15,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:15,078 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:15,096 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 12:38:15,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:38:15,296 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash 419778619, now seen corresponding path program 21 times [2021-08-21 12:38:15,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:15,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116942515] [2021-08-21 12:38:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:15,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:15,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:15,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116942515] [2021-08-21 12:38:15,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116942515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:15,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492925950] [2021-08-21 12:38:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:15,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:15,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:15,560 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 12:38:15,561 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 12:38:16,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:38:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:16,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:17,045 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:17,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:17,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492925950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:17,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:17,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:17,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849201270] [2021-08-21 12:38:17,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:17,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:17,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:17,086 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:17,391 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-08-21 12:38:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:17,393 INFO L225 Difference]: With dead ends: 809 [2021-08-21 12:38:17,393 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 12:38:17,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:38:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 12:38:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-08-21 12:38:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-08-21 12:38:17,400 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-08-21 12:38:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:17,400 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-08-21 12:38:17,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-08-21 12:38:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:17,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:17,401 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:17,419 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 12:38:17,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:17,614 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash -581010569, now seen corresponding path program 22 times [2021-08-21 12:38:17,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:17,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183010417] [2021-08-21 12:38:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:17,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:38:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183010417] [2021-08-21 12:38:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183010417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930206241] [2021-08-21 12:38:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:17,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:17,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:17,825 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 12:38:17,826 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 12:38:18,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:18,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:19,301 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:19,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930206241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:19,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:19,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-08-21 12:38:19,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568886547] [2021-08-21 12:38:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:38:19,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:38:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:38:19,339 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:19,598 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-08-21 12:38:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:38:19,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:38:19,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:19,600 INFO L225 Difference]: With dead ends: 853 [2021-08-21 12:38:19,600 INFO L226 Difference]: Without dead ends: 708 [2021-08-21 12:38:19,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-08-21 12:38:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-08-21 12:38:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-08-21 12:38:19,607 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-08-21 12:38:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:19,607 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-08-21 12:38:19,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-08-21 12:38:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:19,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:19,608 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:19,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:38:19,826 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1729386449, now seen corresponding path program 23 times [2021-08-21 12:38:19,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:19,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151515029] [2021-08-21 12:38:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:19,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:38:20,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:20,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151515029] [2021-08-21 12:38:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151515029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:20,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120769117] [2021-08-21 12:38:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:20,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:20,054 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 12:38:20,055 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 12:38:20,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:38:20,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:20,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:21,621 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:21,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:21,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120769117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:21,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:21,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 12:38:21,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359105157] [2021-08-21 12:38:21,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:38:21,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:38:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:38:21,660 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:21,837 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-08-21 12:38:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:38:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:21,840 INFO L225 Difference]: With dead ends: 925 [2021-08-21 12:38:21,840 INFO L226 Difference]: Without dead ends: 872 [2021-08-21 12:38:21,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-08-21 12:38:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-08-21 12:38:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-08-21 12:38:21,847 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-08-21 12:38:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:21,847 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-08-21 12:38:21,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-08-21 12:38:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:21,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:21,848 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:21,872 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 12:38:22,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:38:22,066 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1228777433, now seen corresponding path program 24 times [2021-08-21 12:38:22,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:22,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182224061] [2021-08-21 12:38:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:22,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:22,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:22,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182224061] [2021-08-21 12:38:22,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182224061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:22,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741419851] [2021-08-21 12:38:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:22,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:22,343 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 12:38:22,344 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 12:38:23,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:38:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:23,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:23,914 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741419851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:23,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:23,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 12:38:23,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50517552] [2021-08-21 12:38:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:38:23,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:38:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:23,945 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:24,157 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-08-21 12:38:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:38:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-08-21 12:38:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:24,160 INFO L225 Difference]: With dead ends: 962 [2021-08-21 12:38:24,160 INFO L226 Difference]: Without dead ends: 906 [2021-08-21 12:38:24,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-08-21 12:38:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-08-21 12:38:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-08-21 12:38:24,190 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-08-21 12:38:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:24,190 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-08-21 12:38:24,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-08-21 12:38:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:24,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:24,191 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:24,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:38:24,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:24,392 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1446151825, now seen corresponding path program 25 times [2021-08-21 12:38:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:24,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408946332] [2021-08-21 12:38:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:24,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:24,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:24,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408946332] [2021-08-21 12:38:24,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408946332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:24,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80906979] [2021-08-21 12:38:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:24,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:24,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:24,620 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 12:38:24,665 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 12:38:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:25,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:26,278 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:26,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80906979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:26,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:26,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:26,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683980043] [2021-08-21 12:38:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:26,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:26,311 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:26,571 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-08-21 12:38:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:38:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:26,573 INFO L225 Difference]: With dead ends: 936 [2021-08-21 12:38:26,573 INFO L226 Difference]: Without dead ends: 877 [2021-08-21 12:38:26,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-21 12:38:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-08-21 12:38:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-08-21 12:38:26,580 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-08-21 12:38:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:26,580 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-08-21 12:38:26,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-08-21 12:38:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:26,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:26,581 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:26,599 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 12:38:26,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:26,799 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash 973292475, now seen corresponding path program 26 times [2021-08-21 12:38:26,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:26,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4761785] [2021-08-21 12:38:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:26,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:27,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:27,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4761785] [2021-08-21 12:38:27,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4761785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:27,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053097512] [2021-08-21 12:38:27,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:27,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:27,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:27,052 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 12:38:27,053 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 12:38:28,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:28,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:28,793 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:28,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053097512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:28,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:28,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:28,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376392109] [2021-08-21 12:38:28,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:28,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:28,835 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:29,070 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-08-21 12:38:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:29,073 INFO L225 Difference]: With dead ends: 947 [2021-08-21 12:38:29,073 INFO L226 Difference]: Without dead ends: 905 [2021-08-21 12:38:29,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-08-21 12:38:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-08-21 12:38:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-08-21 12:38:29,079 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-08-21 12:38:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:29,079 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-08-21 12:38:29,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-08-21 12:38:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:29,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:29,080 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:29,099 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 12:38:29,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:29,299 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -831055813, now seen corresponding path program 27 times [2021-08-21 12:38:29,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:29,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152312280] [2021-08-21 12:38:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:29,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:29,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152312280] [2021-08-21 12:38:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152312280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292390725] [2021-08-21 12:38:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:29,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:29,557 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 12:38:29,558 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 12:38:30,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:38:30,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:30,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:31,547 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-21 12:38:31,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-21 12:38:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:31,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292390725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:31,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:31,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:31,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337129650] [2021-08-21 12:38:31,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:31,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:31,590 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:31,938 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-08-21 12:38:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:31,941 INFO L225 Difference]: With dead ends: 780 [2021-08-21 12:38:31,941 INFO L226 Difference]: Without dead ends: 757 [2021-08-21 12:38:31,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:38:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-08-21 12:38:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-08-21 12:38:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-08-21 12:38:31,947 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-08-21 12:38:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:31,947 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-08-21 12:38:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-08-21 12:38:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:31,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:31,948 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:31,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:32,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:32,162 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -613681421, now seen corresponding path program 28 times [2021-08-21 12:38:32,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:32,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150223521] [2021-08-21 12:38:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:32,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:32,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150223521] [2021-08-21 12:38:32,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150223521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940397077] [2021-08-21 12:38:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:32,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:32,434 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 12:38:32,435 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 12:38:33,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:33,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:33,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:34,395 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:34,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940397077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:34,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:34,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:34,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858842583] [2021-08-21 12:38:34,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:34,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:34,434 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:34,743 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-08-21 12:38:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:34,746 INFO L225 Difference]: With dead ends: 833 [2021-08-21 12:38:34,746 INFO L226 Difference]: Without dead ends: 812 [2021-08-21 12:38:34,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:38:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-21 12:38:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-08-21 12:38:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-08-21 12:38:34,752 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-08-21 12:38:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:34,752 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-08-21 12:38:34,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-08-21 12:38:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:34,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:34,753 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:34,802 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 12:38:34,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 12:38:34,954 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1614470609, now seen corresponding path program 29 times [2021-08-21 12:38:34,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:34,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413835840] [2021-08-21 12:38:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:34,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:38:35,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:35,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413835840] [2021-08-21 12:38:35,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413835840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:35,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120890201] [2021-08-21 12:38:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:35,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:35,193 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 12:38:35,193 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 12:38:36,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:38:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:36,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:36,997 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-21 12:38:36,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-21 12:38:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:37,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120890201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:37,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:37,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 12:38:37,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102365182] [2021-08-21 12:38:37,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:38:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:38:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:38:37,036 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:37,463 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-08-21 12:38:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:38:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:38:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:37,465 INFO L225 Difference]: With dead ends: 1001 [2021-08-21 12:38:37,465 INFO L226 Difference]: Without dead ends: 828 [2021-08-21 12:38:37,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:38:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-21 12:38:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-08-21 12:38:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-08-21 12:38:37,472 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-08-21 12:38:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:37,472 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-08-21 12:38:37,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-08-21 12:38:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:37,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:37,473 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:37,492 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 12:38:37,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:37,685 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash 195317393, now seen corresponding path program 30 times [2021-08-21 12:38:37,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:37,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142489280] [2021-08-21 12:38:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:37,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:37,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:37,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142489280] [2021-08-21 12:38:37,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142489280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:37,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190415444] [2021-08-21 12:38:37,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:37,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:37,960 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 12:38:37,960 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 12:38:39,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:38:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:39,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:39,826 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:39,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190415444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:39,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:39,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 12:38:39,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734110980] [2021-08-21 12:38:39,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:38:39,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:38:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:39,863 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:40,079 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-08-21 12:38:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:38:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-08-21 12:38:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:40,082 INFO L225 Difference]: With dead ends: 1117 [2021-08-21 12:38:40,082 INFO L226 Difference]: Without dead ends: 1061 [2021-08-21 12:38:40,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-08-21 12:38:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-08-21 12:38:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-08-21 12:38:40,103 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-08-21 12:38:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:40,103 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-08-21 12:38:40,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-08-21 12:38:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:40,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:40,117 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:40,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:40,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:40,337 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 412691785, now seen corresponding path program 31 times [2021-08-21 12:38:40,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:40,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077219689] [2021-08-21 12:38:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:40,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:40,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:40,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077219689] [2021-08-21 12:38:40,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077219689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:40,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750935646] [2021-08-21 12:38:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:40,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:40,604 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 12:38:40,605 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 12:38:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:41,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:42,396 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750935646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:42,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:42,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:42,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330472845] [2021-08-21 12:38:42,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:42,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:42,431 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:42,684 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-08-21 12:38:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:38:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:42,688 INFO L225 Difference]: With dead ends: 1088 [2021-08-21 12:38:42,688 INFO L226 Difference]: Without dead ends: 1029 [2021-08-21 12:38:42,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-08-21 12:38:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-08-21 12:38:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-08-21 12:38:42,711 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-08-21 12:38:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:42,711 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-08-21 12:38:42,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-08-21 12:38:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:42,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:42,712 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:42,748 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 12:38:42,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:38:42,912 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash -60167565, now seen corresponding path program 32 times [2021-08-21 12:38:42,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:42,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089649742] [2021-08-21 12:38:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:42,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:43,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:43,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089649742] [2021-08-21 12:38:43,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089649742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:43,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186157802] [2021-08-21 12:38:43,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:43,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:43,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:43,213 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 12:38:43,214 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 12:38:44,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:44,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:45,348 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:45,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186157802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:45,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:45,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:45,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961241872] [2021-08-21 12:38:45,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:45,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:45,391 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:45,656 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-08-21 12:38:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:45,656 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:45,659 INFO L225 Difference]: With dead ends: 1059 [2021-08-21 12:38:45,659 INFO L226 Difference]: Without dead ends: 1017 [2021-08-21 12:38:45,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-08-21 12:38:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-08-21 12:38:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-08-21 12:38:45,668 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-08-21 12:38:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:45,669 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-08-21 12:38:45,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-08-21 12:38:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:45,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:45,669 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:45,690 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 12:38:45,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:38:45,870 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 472265399, now seen corresponding path program 33 times [2021-08-21 12:38:45,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:45,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903322466] [2021-08-21 12:38:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:45,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:38:46,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:46,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903322466] [2021-08-21 12:38:46,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903322466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:46,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811193389] [2021-08-21 12:38:46,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:46,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:46,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:46,233 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 12:38:46,292 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 12:38:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:38:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:47,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:48,496 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:48,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:48,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811193389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:48,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:48,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 12:38:48,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541359558] [2021-08-21 12:38:48,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:38:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:38:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:38:48,535 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:48,674 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-08-21 12:38:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:38:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:38:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:48,677 INFO L225 Difference]: With dead ends: 1026 [2021-08-21 12:38:48,677 INFO L226 Difference]: Without dead ends: 938 [2021-08-21 12:38:48,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:38:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-08-21 12:38:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-08-21 12:38:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-08-21 12:38:48,684 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-08-21 12:38:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:48,684 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-08-21 12:38:48,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-08-21 12:38:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:48,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:48,685 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:48,705 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 12:38:48,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:38:48,905 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2012913895, now seen corresponding path program 34 times [2021-08-21 12:38:48,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:48,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78401879] [2021-08-21 12:38:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:48,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:49,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:49,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78401879] [2021-08-21 12:38:49,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78401879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:49,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188161661] [2021-08-21 12:38:49,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:49,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:49,161 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 12:38:49,162 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 12:38:50,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:50,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:50,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:51,242 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:51,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188161661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:51,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:51,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 12:38:51,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940636134] [2021-08-21 12:38:51,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:38:51,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:38:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:51,281 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:51,505 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-08-21 12:38:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-08-21 12:38:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:51,508 INFO L225 Difference]: With dead ends: 1110 [2021-08-21 12:38:51,508 INFO L226 Difference]: Without dead ends: 1057 [2021-08-21 12:38:51,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-08-21 12:38:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-08-21 12:38:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-08-21 12:38:51,515 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-08-21 12:38:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:51,515 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-08-21 12:38:51,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 12:38:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-08-21 12:38:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:51,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:51,516 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:51,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 12:38:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:38:51,736 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:51,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1795539503, now seen corresponding path program 35 times [2021-08-21 12:38:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898993339] [2021-08-21 12:38:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:51,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:52,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:52,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898993339] [2021-08-21 12:38:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898993339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:52,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162768278] [2021-08-21 12:38:52,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:52,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:52,054 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 12:38:52,055 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 12:38:53,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:38:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:53,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:54,334 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:54,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:54,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162768278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:54,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:54,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:54,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89725714] [2021-08-21 12:38:54,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:54,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:54,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:54,372 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:54,589 INFO L93 Difference]: Finished difference Result 1101 states and 2228 transitions. [2021-08-21 12:38:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:54,591 INFO L225 Difference]: With dead ends: 1101 [2021-08-21 12:38:54,591 INFO L226 Difference]: Without dead ends: 1061 [2021-08-21 12:38:54,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-08-21 12:38:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 560. [2021-08-21 12:38:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.9821109123434706) internal successors, (1108), 559 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1108 transitions. [2021-08-21 12:38:54,599 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1108 transitions. Word has length 31 [2021-08-21 12:38:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:54,599 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 1108 transitions. [2021-08-21 12:38:54,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1108 transitions. [2021-08-21 12:38:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:54,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:54,600 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:54,622 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 12:38:54,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:54,821 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2026568443, now seen corresponding path program 36 times [2021-08-21 12:38:54,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:54,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920153669] [2021-08-21 12:38:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:54,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:55,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:55,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920153669] [2021-08-21 12:38:55,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920153669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:55,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684660803] [2021-08-21 12:38:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:55,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:55,097 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 12:38:55,098 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 12:38:56,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:38:56,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:56,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:57,427 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:38:57,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:38:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:57,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684660803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:57,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:57,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:38:57,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405237046] [2021-08-21 12:38:57,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:38:57,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:38:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:57,468 INFO L87 Difference]: Start difference. First operand 560 states and 1108 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:57,767 INFO L93 Difference]: Finished difference Result 947 states and 1902 transitions. [2021-08-21 12:38:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:38:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:38:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:57,769 INFO L225 Difference]: With dead ends: 947 [2021-08-21 12:38:57,769 INFO L226 Difference]: Without dead ends: 925 [2021-08-21 12:38:57,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:38:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-08-21 12:38:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 560. [2021-08-21 12:38:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.9821109123434706) internal successors, (1108), 559 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1108 transitions. [2021-08-21 12:38:57,776 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1108 transitions. Word has length 31 [2021-08-21 12:38:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 1108 transitions. [2021-08-21 12:38:57,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:38:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1108 transitions. [2021-08-21 12:38:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:38:57,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:57,777 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:57,800 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 12:38:57,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:38:57,993 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash 469961651, now seen corresponding path program 37 times [2021-08-21 12:38:57,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:57,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090704126] [2021-08-21 12:38:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:57,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:58,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:58,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090704126] [2021-08-21 12:38:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090704126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:58,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274397543] [2021-08-21 12:38:58,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:58,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:58,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:58,267 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 12:38:58,268 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 12:38:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:38:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:00,736 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:39:00,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 12:39:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274397543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:00,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:00,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:39:00,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279614243] [2021-08-21 12:39:00,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:39:00,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:39:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:00,777 INFO L87 Difference]: Start difference. First operand 560 states and 1108 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:39:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:01,014 INFO L93 Difference]: Finished difference Result 958 states and 1925 transitions. [2021-08-21 12:39:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-08-21 12:39:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:01,016 INFO L225 Difference]: With dead ends: 958 [2021-08-21 12:39:01,016 INFO L226 Difference]: Without dead ends: 935 [2021-08-21 12:39:01,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-08-21 12:39:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 570. [2021-08-21 12:39:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.984182776801406) internal successors, (1129), 569 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1129 transitions. [2021-08-21 12:39:01,023 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1129 transitions. Word has length 31 [2021-08-21 12:39:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:01,023 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1129 transitions. [2021-08-21 12:39:01,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 12:39:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1129 transitions. [2021-08-21 12:39:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:01,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:01,024 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:01,059 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 12:39:01,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 12:39:01,225 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1335222019, now seen corresponding path program 38 times [2021-08-21 12:39:01,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:01,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822604486] [2021-08-21 12:39:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:01,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:01,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:01,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822604486] [2021-08-21 12:39:01,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822604486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:01,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882200070] [2021-08-21 12:39:01,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:01,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:01,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:01,500 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 12:39:01,501 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 12:39:03,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:03,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:03,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:03,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:03,892 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:03,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882200070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:03,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:03,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:03,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796641188] [2021-08-21 12:39:03,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:03,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:03,929 INFO L87 Difference]: Start difference. First operand 570 states and 1129 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:04,242 INFO L93 Difference]: Finished difference Result 1262 states and 2521 transitions. [2021-08-21 12:39:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:39:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:04,244 INFO L225 Difference]: With dead ends: 1262 [2021-08-21 12:39:04,244 INFO L226 Difference]: Without dead ends: 1109 [2021-08-21 12:39:04,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:39:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-21 12:39:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 663. [2021-08-21 12:39:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.959214501510574) internal successors, (1297), 662 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1297 transitions. [2021-08-21 12:39:04,252 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1297 transitions. Word has length 31 [2021-08-21 12:39:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:04,252 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1297 transitions. [2021-08-21 12:39:04,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1297 transitions. [2021-08-21 12:39:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:04,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:04,253 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:04,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:39:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 12:39:04,464 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:04,464 INFO L82 PathProgramCache]: Analyzing trace with hash -932582883, now seen corresponding path program 39 times [2021-08-21 12:39:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:04,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534110048] [2021-08-21 12:39:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:04,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:04,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:04,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534110048] [2021-08-21 12:39:04,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534110048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:04,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414065855] [2021-08-21 12:39:04,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:04,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:04,845 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 12:39:04,847 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 12:39:06,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:39:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:06,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:39:06,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:07,320 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 12:39:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 48 [2021-08-21 12:39:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414065855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:07,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109668348] [2021-08-21 12:39:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:07,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:07,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:07,398 INFO L87 Difference]: Start difference. First operand 663 states and 1297 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:07,724 INFO L93 Difference]: Finished difference Result 1239 states and 2464 transitions. [2021-08-21 12:39:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:39:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:07,726 INFO L225 Difference]: With dead ends: 1239 [2021-08-21 12:39:07,726 INFO L226 Difference]: Without dead ends: 1125 [2021-08-21 12:39:07,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:39:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-08-21 12:39:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 732. [2021-08-21 12:39:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 1.9534883720930232) internal successors, (1428), 731 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1428 transitions. [2021-08-21 12:39:07,738 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1428 transitions. Word has length 31 [2021-08-21 12:39:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:07,738 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1428 transitions. [2021-08-21 12:39:07,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1428 transitions. [2021-08-21 12:39:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:07,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:07,749 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:07,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:07,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:07,971 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:07,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1933372071, now seen corresponding path program 40 times [2021-08-21 12:39:07,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:07,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930492256] [2021-08-21 12:39:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:07,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:08,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:08,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930492256] [2021-08-21 12:39:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930492256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:08,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087814040] [2021-08-21 12:39:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:08,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:08,348 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 12:39:08,349 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 12:39:10,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:10,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:10,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:10,840 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:10,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087814040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:10,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:10,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 12:39:10,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758345508] [2021-08-21 12:39:10,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:39:10,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:39:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:10,879 INFO L87 Difference]: Start difference. First operand 732 states and 1428 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:11,231 INFO L93 Difference]: Finished difference Result 1332 states and 2636 transitions. [2021-08-21 12:39:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:39:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:11,233 INFO L225 Difference]: With dead ends: 1332 [2021-08-21 12:39:11,233 INFO L226 Difference]: Without dead ends: 1147 [2021-08-21 12:39:11,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:39:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-08-21 12:39:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 648. [2021-08-21 12:39:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.9752704791344669) internal successors, (1278), 647 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1278 transitions. [2021-08-21 12:39:11,242 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1278 transitions. Word has length 31 [2021-08-21 12:39:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:11,242 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1278 transitions. [2021-08-21 12:39:11,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1278 transitions. [2021-08-21 12:39:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:11,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:11,265 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:11,286 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 12:39:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:11,486 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 93790323, now seen corresponding path program 41 times [2021-08-21 12:39:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:11,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111020080] [2021-08-21 12:39:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:11,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:11,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:11,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111020080] [2021-08-21 12:39:11,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111020080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:11,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710745923] [2021-08-21 12:39:11,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:11,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:11,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:11,708 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 12:39:11,709 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 12:39:13,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:39:13,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:13,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:14,292 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:14,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710745923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:14,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:14,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129903234] [2021-08-21 12:39:14,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:14,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:14,333 INFO L87 Difference]: Start difference. First operand 648 states and 1278 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:14,640 INFO L93 Difference]: Finished difference Result 1305 states and 2649 transitions. [2021-08-21 12:39:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:39:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:14,643 INFO L225 Difference]: With dead ends: 1305 [2021-08-21 12:39:14,643 INFO L226 Difference]: Without dead ends: 1246 [2021-08-21 12:39:14,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-08-21 12:39:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 678. [2021-08-21 12:39:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9719350073855244) internal successors, (1335), 677 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1335 transitions. [2021-08-21 12:39:14,653 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1335 transitions. Word has length 31 [2021-08-21 12:39:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1335 transitions. [2021-08-21 12:39:14,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1335 transitions. [2021-08-21 12:39:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:14,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:14,654 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:14,677 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 12:39:14,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:39:14,860 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -379069027, now seen corresponding path program 42 times [2021-08-21 12:39:14,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:14,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186496726] [2021-08-21 12:39:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:14,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:15,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:15,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186496726] [2021-08-21 12:39:15,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186496726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:15,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567537226] [2021-08-21 12:39:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:15,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:15,133 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 12:39:15,142 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 12:39:17,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:39:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:17,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:17,650 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:17,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567537226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:17,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:17,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:17,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072033768] [2021-08-21 12:39:17,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:17,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:17,683 INFO L87 Difference]: Start difference. First operand 678 states and 1335 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:17,957 INFO L93 Difference]: Finished difference Result 1186 states and 2396 transitions. [2021-08-21 12:39:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:39:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:17,959 INFO L225 Difference]: With dead ends: 1186 [2021-08-21 12:39:17,959 INFO L226 Difference]: Without dead ends: 1144 [2021-08-21 12:39:17,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-21 12:39:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 681. [2021-08-21 12:39:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.9720588235294119) internal successors, (1341), 680 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1341 transitions. [2021-08-21 12:39:17,967 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1341 transitions. Word has length 31 [2021-08-21 12:39:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:17,967 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1341 transitions. [2021-08-21 12:39:17,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1341 transitions. [2021-08-21 12:39:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:17,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:17,972 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:17,996 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 12:39:18,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 12:39:18,194 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:18,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 153363937, now seen corresponding path program 43 times [2021-08-21 12:39:18,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:18,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892873604] [2021-08-21 12:39:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:18,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:18,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:18,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892873604] [2021-08-21 12:39:18,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892873604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:18,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151656193] [2021-08-21 12:39:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:18,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:18,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:18,433 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 12:39:18,473 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 12:39:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:20,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:20,997 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:21,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151656193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:21,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:21,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 12:39:21,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726252403] [2021-08-21 12:39:21,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:39:21,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:39:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:21,028 INFO L87 Difference]: Start difference. First operand 681 states and 1341 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:21,264 INFO L93 Difference]: Finished difference Result 1336 states and 2683 transitions. [2021-08-21 12:39:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:39:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:21,266 INFO L225 Difference]: With dead ends: 1336 [2021-08-21 12:39:21,266 INFO L226 Difference]: Without dead ends: 1232 [2021-08-21 12:39:21,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-08-21 12:39:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 735. [2021-08-21 12:39:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.9741144414168936) internal successors, (1449), 734 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1449 transitions. [2021-08-21 12:39:21,275 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1449 transitions. Word has length 31 [2021-08-21 12:39:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:21,275 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1449 transitions. [2021-08-21 12:39:21,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1449 transitions. [2021-08-21 12:39:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:21,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:21,276 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:21,298 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 12:39:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:39:21,487 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2114440965, now seen corresponding path program 44 times [2021-08-21 12:39:21,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:21,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165914570] [2021-08-21 12:39:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:21,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:21,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165914570] [2021-08-21 12:39:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165914570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211652652] [2021-08-21 12:39:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:21,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:21,733 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 12:39:21,752 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 12:39:23,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:23,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:24,427 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:24,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211652652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:24,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:24,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:24,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214919240] [2021-08-21 12:39:24,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:24,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:24,501 INFO L87 Difference]: Start difference. First operand 735 states and 1449 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:24,780 INFO L93 Difference]: Finished difference Result 1350 states and 2730 transitions. [2021-08-21 12:39:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:24,780 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:24,782 INFO L225 Difference]: With dead ends: 1350 [2021-08-21 12:39:24,782 INFO L226 Difference]: Without dead ends: 1295 [2021-08-21 12:39:24,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-08-21 12:39:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 750. [2021-08-21 12:39:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.9746328437917222) internal successors, (1479), 749 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1479 transitions. [2021-08-21 12:39:24,794 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1479 transitions. Word has length 31 [2021-08-21 12:39:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:24,794 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1479 transitions. [2021-08-21 12:39:24,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1479 transitions. [2021-08-21 12:39:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:24,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:24,795 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:24,820 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 12:39:25,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:25,018 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1707666981, now seen corresponding path program 45 times [2021-08-21 12:39:25,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:25,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035134711] [2021-08-21 12:39:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:25,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:25,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:25,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035134711] [2021-08-21 12:39:25,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035134711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:25,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586513793] [2021-08-21 12:39:25,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:25,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:25,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:25,297 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 12:39:25,340 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 12:39:27,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:39:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:27,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:27,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:27,883 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:27,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:27,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586513793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:27,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:27,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:27,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506335781] [2021-08-21 12:39:27,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:27,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:27,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:27,911 INFO L87 Difference]: Start difference. First operand 750 states and 1479 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:28,059 INFO L93 Difference]: Finished difference Result 1107 states and 2216 transitions. [2021-08-21 12:39:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:28,061 INFO L225 Difference]: With dead ends: 1107 [2021-08-21 12:39:28,061 INFO L226 Difference]: Without dead ends: 1085 [2021-08-21 12:39:28,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-08-21 12:39:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 750. [2021-08-21 12:39:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.9746328437917222) internal successors, (1479), 749 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1479 transitions. [2021-08-21 12:39:28,071 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1479 transitions. Word has length 31 [2021-08-21 12:39:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:28,071 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1479 transitions. [2021-08-21 12:39:28,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1479 transitions. [2021-08-21 12:39:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:28,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:28,073 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:28,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:28,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:28,293 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash 151060189, now seen corresponding path program 46 times [2021-08-21 12:39:28,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:28,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405843932] [2021-08-21 12:39:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:28,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:28,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:28,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405843932] [2021-08-21 12:39:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405843932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:28,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356666848] [2021-08-21 12:39:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:28,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:28,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:28,568 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 12:39:28,575 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 12:39:30,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:30,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:31,247 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:39:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:39:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356666848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:31,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:39:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480542524] [2021-08-21 12:39:31,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:39:31,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:39:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:31,285 INFO L87 Difference]: Start difference. First operand 750 states and 1479 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:31,540 INFO L93 Difference]: Finished difference Result 1118 states and 2239 transitions. [2021-08-21 12:39:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:31,543 INFO L225 Difference]: With dead ends: 1118 [2021-08-21 12:39:31,543 INFO L226 Difference]: Without dead ends: 1095 [2021-08-21 12:39:31,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-08-21 12:39:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 750. [2021-08-21 12:39:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.9746328437917222) internal successors, (1479), 749 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1479 transitions. [2021-08-21 12:39:31,586 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1479 transitions. Word has length 31 [2021-08-21 12:39:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1479 transitions. [2021-08-21 12:39:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1479 transitions. [2021-08-21 12:39:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:31,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:31,587 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:31,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:31,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:31,801 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1344463177, now seen corresponding path program 47 times [2021-08-21 12:39:31,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:31,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539406274] [2021-08-21 12:39:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:31,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:32,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:32,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539406274] [2021-08-21 12:39:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539406274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:32,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778797216] [2021-08-21 12:39:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:32,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:32,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:32,101 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 12:39:32,141 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 12:39:34,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:39:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:34,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:34,776 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:39:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 12:39:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:34,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778797216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:34,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:34,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-21 12:39:34,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950888938] [2021-08-21 12:39:34,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:34,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:34,808 INFO L87 Difference]: Start difference. First operand 750 states and 1479 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:34,987 INFO L93 Difference]: Finished difference Result 1193 states and 2397 transitions. [2021-08-21 12:39:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:34,989 INFO L225 Difference]: With dead ends: 1193 [2021-08-21 12:39:34,989 INFO L226 Difference]: Without dead ends: 1089 [2021-08-21 12:39:34,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-21 12:39:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 777. [2021-08-21 12:39:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.981958762886598) internal successors, (1538), 776 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1538 transitions. [2021-08-21 12:39:34,998 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1538 transitions. Word has length 31 [2021-08-21 12:39:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:34,998 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1538 transitions. [2021-08-21 12:39:34,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1538 transitions. [2021-08-21 12:39:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:34,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:34,999 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:35,024 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 12:39:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 12:39:35,222 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1802128239, now seen corresponding path program 48 times [2021-08-21 12:39:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:35,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408682618] [2021-08-21 12:39:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:35,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:35,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:35,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408682618] [2021-08-21 12:39:35,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408682618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:35,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226644244] [2021-08-21 12:39:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:35,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:35,505 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 12:39:35,527 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 12:39:37,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:39:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:37,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:38,465 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:39:38,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 12:39:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:38,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226644244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:38,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:38,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-21 12:39:38,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127356731] [2021-08-21 12:39:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:38,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:38,504 INFO L87 Difference]: Start difference. First operand 777 states and 1538 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:38,687 INFO L93 Difference]: Finished difference Result 1371 states and 2774 transitions. [2021-08-21 12:39:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:38,689 INFO L225 Difference]: With dead ends: 1371 [2021-08-21 12:39:38,689 INFO L226 Difference]: Without dead ends: 1314 [2021-08-21 12:39:38,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-08-21 12:39:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 771. [2021-08-21 12:39:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.9792207792207792) internal successors, (1524), 770 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1524 transitions. [2021-08-21 12:39:38,698 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1524 transitions. Word has length 31 [2021-08-21 12:39:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:38,698 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1524 transitions. [2021-08-21 12:39:38,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1524 transitions. [2021-08-21 12:39:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:38,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:38,699 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:38,724 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 12:39:38,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 12:39:38,922 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 682699217, now seen corresponding path program 49 times [2021-08-21 12:39:38,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:38,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628772692] [2021-08-21 12:39:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:38,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:39,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:39,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628772692] [2021-08-21 12:39:39,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628772692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:39,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269383401] [2021-08-21 12:39:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:39,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:39,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:39,219 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 12:39:39,220 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 12:39:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:41,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:42,229 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:39:42,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 12:39:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:42,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269383401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:42,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 12:39:42,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439374292] [2021-08-21 12:39:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:39:42,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:39:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:42,267 INFO L87 Difference]: Start difference. First operand 771 states and 1524 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:42,501 INFO L93 Difference]: Finished difference Result 1350 states and 2727 transitions. [2021-08-21 12:39:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:42,503 INFO L225 Difference]: With dead ends: 1350 [2021-08-21 12:39:42,503 INFO L226 Difference]: Without dead ends: 1295 [2021-08-21 12:39:42,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-08-21 12:39:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 759. [2021-08-21 12:39:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9788918205804749) internal successors, (1500), 758 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1500 transitions. [2021-08-21 12:39:42,511 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1500 transitions. Word has length 31 [2021-08-21 12:39:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:42,511 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1500 transitions. [2021-08-21 12:39:42,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1500 transitions. [2021-08-21 12:39:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:42,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:42,512 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:42,536 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 12:39:42,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:42,734 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash 209839867, now seen corresponding path program 50 times [2021-08-21 12:39:42,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:42,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828737214] [2021-08-21 12:39:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:42,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:43,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:43,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828737214] [2021-08-21 12:39:43,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828737214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463223804] [2021-08-21 12:39:43,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:43,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:43,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:43,033 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 12:39:43,034 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 12:39:45,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:45,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:45,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:46,001 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:39:46,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 12:39:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:46,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463223804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:46,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:46,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 12:39:46,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106113390] [2021-08-21 12:39:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:39:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:39:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:46,032 INFO L87 Difference]: Start difference. First operand 759 states and 1500 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:46,242 INFO L93 Difference]: Finished difference Result 1144 states and 2294 transitions. [2021-08-21 12:39:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:46,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:46,262 INFO L225 Difference]: With dead ends: 1144 [2021-08-21 12:39:46,262 INFO L226 Difference]: Without dead ends: 1122 [2021-08-21 12:39:46,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-08-21 12:39:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 759. [2021-08-21 12:39:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9788918205804749) internal successors, (1500), 758 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1500 transitions. [2021-08-21 12:39:46,284 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1500 transitions. Word has length 31 [2021-08-21 12:39:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1500 transitions. [2021-08-21 12:39:46,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1500 transitions. [2021-08-21 12:39:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:46,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:46,285 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:46,348 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 12:39:46,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:39:46,505 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1346766925, now seen corresponding path program 51 times [2021-08-21 12:39:46,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:46,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491514167] [2021-08-21 12:39:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:46,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:46,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:46,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491514167] [2021-08-21 12:39:46,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491514167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:46,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817927461] [2021-08-21 12:39:46,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:46,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:46,808 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 12:39:46,809 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 12:39:49,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:39:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:49,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:49,846 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:39:49,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 12:39:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:49,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817927461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:49,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:49,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 12:39:49,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924487203] [2021-08-21 12:39:49,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:39:49,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:39:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:49,885 INFO L87 Difference]: Start difference. First operand 759 states and 1500 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:50,156 INFO L93 Difference]: Finished difference Result 1127 states and 2261 transitions. [2021-08-21 12:39:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:39:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:50,158 INFO L225 Difference]: With dead ends: 1127 [2021-08-21 12:39:50,158 INFO L226 Difference]: Without dead ends: 1104 [2021-08-21 12:39:50,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-08-21 12:39:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 753. [2021-08-21 12:39:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.976063829787234) internal successors, (1486), 752 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1486 transitions. [2021-08-21 12:39:50,165 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1486 transitions. Word has length 31 [2021-08-21 12:39:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:50,165 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1486 transitions. [2021-08-21 12:39:50,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1486 transitions. [2021-08-21 12:39:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:39:50,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:50,166 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:50,191 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 12:39:50,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:39:50,367 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash -498068899, now seen corresponding path program 52 times [2021-08-21 12:39:50,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:50,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238063191] [2021-08-21 12:39:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:50,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:50,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:50,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238063191] [2021-08-21 12:39:50,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238063191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:50,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877352911] [2021-08-21 12:39:50,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:50,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:50,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:50,658 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 12:39:50,659 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 12:39:53,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:53,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:39:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:53,703 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:39:53,703 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 72 treesize of output 32 [2021-08-21 12:39:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:53,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877352911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:53,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:53,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-21 12:39:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510953517] [2021-08-21 12:39:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:53,740 INFO L87 Difference]: Start difference. First operand 753 states and 1486 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:53,983 INFO L93 Difference]: Finished difference Result 1003 states and 1997 transitions. [2021-08-21 12:39:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:39:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:39:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:53,984 INFO L225 Difference]: With dead ends: 1003 [2021-08-21 12:39:53,984 INFO L226 Difference]: Without dead ends: 988 [2021-08-21 12:39:53,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-08-21 12:39:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 760. [2021-08-21 12:39:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.9776021080368906) internal successors, (1501), 759 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1501 transitions. [2021-08-21 12:39:53,991 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1501 transitions. Word has length 31 [2021-08-21 12:39:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:53,991 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1501 transitions. [2021-08-21 12:39:53,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1501 transitions. [2021-08-21 12:39:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:39:53,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:53,992 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:54,015 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 12:39:54,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:54,215 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1419037698, now seen corresponding path program 53 times [2021-08-21 12:39:54,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:54,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436096547] [2021-08-21 12:39:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:54,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:54,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436096547] [2021-08-21 12:39:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436096547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18619099] [2021-08-21 12:39:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:54,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:54,317 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 12:39:54,357 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 12:39:56,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:39:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:39:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18619099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:56,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:56,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:39:56,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331182972] [2021-08-21 12:39:57,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:39:57,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:57,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:39:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:39:57,000 INFO L87 Difference]: Start difference. First operand 760 states and 1501 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:57,021 INFO L93 Difference]: Finished difference Result 1049 states and 2079 transitions. [2021-08-21 12:39:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:39:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:39:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:57,022 INFO L225 Difference]: With dead ends: 1049 [2021-08-21 12:39:57,022 INFO L226 Difference]: Without dead ends: 1040 [2021-08-21 12:39:57,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:39:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-08-21 12:39:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 821. [2021-08-21 12:39:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.9951219512195122) internal successors, (1636), 820 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1636 transitions. [2021-08-21 12:39:57,030 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1636 transitions. Word has length 33 [2021-08-21 12:39:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:57,030 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1636 transitions. [2021-08-21 12:39:57,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1636 transitions. [2021-08-21 12:39:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:39:57,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:57,031 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:57,055 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 12:39:57,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:57,253 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1549805031, now seen corresponding path program 54 times [2021-08-21 12:39:57,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:57,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625055772] [2021-08-21 12:39:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:57,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:39:57,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:57,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625055772] [2021-08-21 12:39:57,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625055772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:57,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517941234] [2021-08-21 12:39:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:57,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:57,520 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 12:39:57,521 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 12:39:59,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:39:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:59,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:39:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:00,715 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:40:00,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:40:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:00,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517941234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:00,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:00,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 12:40:00,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238599091] [2021-08-21 12:40:00,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:40:00,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:00,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:40:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:40:00,748 INFO L87 Difference]: Start difference. First operand 821 states and 1636 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 12:40:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:01,065 INFO L93 Difference]: Finished difference Result 1399 states and 2817 transitions. [2021-08-21 12:40:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:40:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 34 [2021-08-21 12:40:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:01,067 INFO L225 Difference]: With dead ends: 1399 [2021-08-21 12:40:01,067 INFO L226 Difference]: Without dead ends: 1384 [2021-08-21 12:40:01,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:40:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-08-21 12:40:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 845. [2021-08-21 12:40:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9917061611374407) internal successors, (1681), 844 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1681 transitions. [2021-08-21 12:40:01,076 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1681 transitions. Word has length 34 [2021-08-21 12:40:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:01,076 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1681 transitions. [2021-08-21 12:40:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 12:40:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1681 transitions. [2021-08-21 12:40:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:40:01,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:01,077 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:01,100 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 12:40:01,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:40:01,296 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1285498223, now seen corresponding path program 55 times [2021-08-21 12:40:01,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:01,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587879972] [2021-08-21 12:40:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:01,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:01,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:01,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587879972] [2021-08-21 12:40:01,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587879972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:01,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678653876] [2021-08-21 12:40:01,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:40:01,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:01,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:01,597 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 12:40:01,598 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 12:40:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:04,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:40:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:04,945 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:40:04,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:40:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:04,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678653876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:04,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:04,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 12:40:04,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537482688] [2021-08-21 12:40:04,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:40:04,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:40:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:40:04,979 INFO L87 Difference]: Start difference. First operand 845 states and 1681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:05,373 INFO L93 Difference]: Finished difference Result 1577 states and 3194 transitions. [2021-08-21 12:40:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:40:05,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:40:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:05,375 INFO L225 Difference]: With dead ends: 1577 [2021-08-21 12:40:05,375 INFO L226 Difference]: Without dead ends: 1532 [2021-08-21 12:40:05,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:40:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-08-21 12:40:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 875. [2021-08-21 12:40:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.988558352402746) internal successors, (1738), 874 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1738 transitions. [2021-08-21 12:40:05,386 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1738 transitions. Word has length 34 [2021-08-21 12:40:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:05,386 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1738 transitions. [2021-08-21 12:40:05,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1738 transitions. [2021-08-21 12:40:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:40:05,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:05,387 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:05,425 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 12:40:05,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:05,588 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash -473498501, now seen corresponding path program 56 times [2021-08-21 12:40:05,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:05,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822966976] [2021-08-21 12:40:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:05,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:05,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:05,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822966976] [2021-08-21 12:40:05,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822966976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:05,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51069995] [2021-08-21 12:40:05,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:40:05,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:05,813 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 12:40:05,814 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 12:40:08,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:08,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:08,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:40:08,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:09,178 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:40:09,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 12:40:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:09,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51069995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:09,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:09,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 12:40:09,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929926853] [2021-08-21 12:40:09,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:40:09,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:40:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:40:09,206 INFO L87 Difference]: Start difference. First operand 875 states and 1738 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:09,474 INFO L93 Difference]: Finished difference Result 1494 states and 3023 transitions. [2021-08-21 12:40:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:40:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:40:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:09,476 INFO L225 Difference]: With dead ends: 1494 [2021-08-21 12:40:09,476 INFO L226 Difference]: Without dead ends: 1449 [2021-08-21 12:40:09,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:40:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-08-21 12:40:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 866. [2021-08-21 12:40:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.9884393063583814) internal successors, (1720), 865 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1720 transitions. [2021-08-21 12:40:09,485 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1720 transitions. Word has length 34 [2021-08-21 12:40:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1720 transitions. [2021-08-21 12:40:09,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1720 transitions. [2021-08-21 12:40:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:09,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:09,486 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:09,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 12:40:09,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 12:40:09,701 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1907210588, now seen corresponding path program 57 times [2021-08-21 12:40:09,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:09,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141840612] [2021-08-21 12:40:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:09,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:40:09,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:09,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141840612] [2021-08-21 12:40:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141840612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:09,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746990348] [2021-08-21 12:40:09,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:40:09,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:09,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:09,943 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 12:40:09,959 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 12:40:12,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:40:12,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:12,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:13,816 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:13,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:13,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746990348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:13,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:13,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 12:40:13,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268263031] [2021-08-21 12:40:13,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:40:13,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:40:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:40:13,880 INFO L87 Difference]: Start difference. First operand 866 states and 1720 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:14,352 INFO L93 Difference]: Finished difference Result 1783 states and 3606 transitions. [2021-08-21 12:40:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:40:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:14,354 INFO L225 Difference]: With dead ends: 1783 [2021-08-21 12:40:14,354 INFO L226 Difference]: Without dead ends: 1738 [2021-08-21 12:40:14,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:40:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-08-21 12:40:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 896. [2021-08-21 12:40:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.9899441340782122) internal successors, (1781), 895 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1781 transitions. [2021-08-21 12:40:14,365 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1781 transitions. Word has length 36 [2021-08-21 12:40:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1781 transitions. [2021-08-21 12:40:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1781 transitions. [2021-08-21 12:40:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:14,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:14,366 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:14,390 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 12:40:14,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 12:40:14,590 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1847921678, now seen corresponding path program 58 times [2021-08-21 12:40:14,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:14,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576383239] [2021-08-21 12:40:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:14,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:40:14,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:14,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576383239] [2021-08-21 12:40:14,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576383239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:14,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066757363] [2021-08-21 12:40:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:40:14,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:14,918 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 12:40:14,919 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 12:40:17,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:40:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:17,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:18,717 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:18,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066757363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:18,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:18,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 12:40:18,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430396149] [2021-08-21 12:40:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:40:18,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:40:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:40:18,780 INFO L87 Difference]: Start difference. First operand 896 states and 1781 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:19,184 INFO L93 Difference]: Finished difference Result 2054 states and 4163 transitions. [2021-08-21 12:40:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:40:19,185 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:19,187 INFO L225 Difference]: With dead ends: 2054 [2021-08-21 12:40:19,187 INFO L226 Difference]: Without dead ends: 2008 [2021-08-21 12:40:19,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:40:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-21 12:40:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1000. [2021-08-21 12:40:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 2.015015015015015) internal successors, (2013), 999 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2013 transitions. [2021-08-21 12:40:19,199 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2013 transitions. Word has length 36 [2021-08-21 12:40:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 2013 transitions. [2021-08-21 12:40:19,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2013 transitions. [2021-08-21 12:40:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:19,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:19,200 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:19,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:40:19,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:19,422 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:19,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:19,422 INFO L82 PathProgramCache]: Analyzing trace with hash 173231452, now seen corresponding path program 59 times [2021-08-21 12:40:19,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:19,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098843547] [2021-08-21 12:40:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:19,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:40:19,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:19,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098843547] [2021-08-21 12:40:19,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098843547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:19,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075868619] [2021-08-21 12:40:19,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:40:19,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:19,782 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 12:40:19,783 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 12:40:22,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:40:22,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:22,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:40:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:23,796 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:23,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075868619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:23,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:23,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 12:40:23,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898418966] [2021-08-21 12:40:23,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:40:23,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:40:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:40:23,855 INFO L87 Difference]: Start difference. First operand 1000 states and 2013 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:24,290 INFO L93 Difference]: Finished difference Result 1565 states and 3175 transitions. [2021-08-21 12:40:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:40:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:24,292 INFO L225 Difference]: With dead ends: 1565 [2021-08-21 12:40:24,292 INFO L226 Difference]: Without dead ends: 1543 [2021-08-21 12:40:24,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 679.7ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:40:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-21 12:40:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1006. [2021-08-21 12:40:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.0159203980099503) internal successors, (2026), 1005 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2026 transitions. [2021-08-21 12:40:24,302 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2026 transitions. Word has length 36 [2021-08-21 12:40:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 2026 transitions. [2021-08-21 12:40:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2026 transitions. [2021-08-21 12:40:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:24,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:24,304 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:24,330 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 12:40:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:24,527 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1791984684, now seen corresponding path program 60 times [2021-08-21 12:40:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:24,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148281194] [2021-08-21 12:40:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:24,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:24,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:24,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148281194] [2021-08-21 12:40:24,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148281194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:24,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350764987] [2021-08-21 12:40:24,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:40:24,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:24,861 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 12:40:24,861 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 12:40:27,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:40:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:27,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:28,867 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:28,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350764987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:28,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:28,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:40:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704757716] [2021-08-21 12:40:28,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:40:28,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:40:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:40:28,929 INFO L87 Difference]: Start difference. First operand 1006 states and 2026 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:29,403 INFO L93 Difference]: Finished difference Result 2346 states and 4805 transitions. [2021-08-21 12:40:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:40:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:29,406 INFO L225 Difference]: With dead ends: 2346 [2021-08-21 12:40:29,406 INFO L226 Difference]: Without dead ends: 2269 [2021-08-21 12:40:29,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:40:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-08-21 12:40:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1054. [2021-08-21 12:40:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.009496676163343) internal successors, (2116), 1053 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2116 transitions. [2021-08-21 12:40:29,420 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2116 transitions. Word has length 36 [2021-08-21 12:40:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 2116 transitions. [2021-08-21 12:40:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2116 transitions. [2021-08-21 12:40:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:29,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:29,421 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:29,448 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 12:40:29,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:40:29,646 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1252149654, now seen corresponding path program 61 times [2021-08-21 12:40:29,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:29,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936495086] [2021-08-21 12:40:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:29,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:29,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:29,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936495086] [2021-08-21 12:40:29,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936495086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:29,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960299905] [2021-08-21 12:40:29,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:40:29,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:29,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:29,978 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 12:40:29,979 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 12:40:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:33,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:34,219 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:34,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960299905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:34,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:34,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:40:34,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183390958] [2021-08-21 12:40:34,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:40:34,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:34,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:40:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:40:34,283 INFO L87 Difference]: Start difference. First operand 1054 states and 2116 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:34,800 INFO L93 Difference]: Finished difference Result 2461 states and 5021 transitions. [2021-08-21 12:40:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:40:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:34,803 INFO L225 Difference]: With dead ends: 2461 [2021-08-21 12:40:34,803 INFO L226 Difference]: Without dead ends: 2383 [2021-08-21 12:40:34,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:40:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-08-21 12:40:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1156. [2021-08-21 12:40:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.000865800865801) internal successors, (2311), 1155 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2311 transitions. [2021-08-21 12:40:34,826 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2311 transitions. Word has length 36 [2021-08-21 12:40:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2311 transitions. [2021-08-21 12:40:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2311 transitions. [2021-08-21 12:40:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:34,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:34,827 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:34,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 12:40:35,050 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash 769003476, now seen corresponding path program 62 times [2021-08-21 12:40:35,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:35,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384544003] [2021-08-21 12:40:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:35,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:35,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:35,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384544003] [2021-08-21 12:40:35,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384544003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:35,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501516093] [2021-08-21 12:40:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:40:35,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:35,340 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 12:40:35,341 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 12:40:38,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:38,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:38,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:39,417 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:39,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:39,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501516093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:39,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:39,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:40:39,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501511658] [2021-08-21 12:40:39,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:40:39,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:40:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:40:39,479 INFO L87 Difference]: Start difference. First operand 1156 states and 2311 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:39,889 INFO L93 Difference]: Finished difference Result 2044 states and 4129 transitions. [2021-08-21 12:40:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:40:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:39,891 INFO L225 Difference]: With dead ends: 2044 [2021-08-21 12:40:39,891 INFO L226 Difference]: Without dead ends: 2016 [2021-08-21 12:40:39,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:40:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-08-21 12:40:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1156. [2021-08-21 12:40:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.000865800865801) internal successors, (2311), 1155 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2311 transitions. [2021-08-21 12:40:39,906 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2311 transitions. Word has length 36 [2021-08-21 12:40:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:39,906 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2311 transitions. [2021-08-21 12:40:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2311 transitions. [2021-08-21 12:40:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:39,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:39,908 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:39,935 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 12:40:40,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:40,133 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2099112920, now seen corresponding path program 63 times [2021-08-21 12:40:40,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:40,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602750926] [2021-08-21 12:40:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:40,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:40:40,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:40,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602750926] [2021-08-21 12:40:40,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602750926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:40,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852869207] [2021-08-21 12:40:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:40:40,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:40,441 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 12:40:40,442 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 12:40:43,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:40:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:43,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:45,867 INFO L354 Elim1Store]: treesize reduction 340, result has 3.7 percent of original size [2021-08-21 12:40:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 79 [2021-08-21 12:40:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:45,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852869207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:45,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-08-21 12:40:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834592512] [2021-08-21 12:40:45,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:40:45,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:40:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:40:45,931 INFO L87 Difference]: Start difference. First operand 1156 states and 2311 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:49,105 INFO L93 Difference]: Finished difference Result 1889 states and 3779 transitions. [2021-08-21 12:40:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:40:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:49,107 INFO L225 Difference]: With dead ends: 1889 [2021-08-21 12:40:49,108 INFO L226 Difference]: Without dead ends: 1787 [2021-08-21 12:40:49,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1832.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:40:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-08-21 12:40:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1320. [2021-08-21 12:40:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.9931766489764973) internal successors, (2629), 1319 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2629 transitions. [2021-08-21 12:40:49,140 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2629 transitions. Word has length 36 [2021-08-21 12:40:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:49,140 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2629 transitions. [2021-08-21 12:40:49,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2629 transitions. [2021-08-21 12:40:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:49,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:49,142 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:49,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:49,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:40:49,369 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2079756346, now seen corresponding path program 64 times [2021-08-21 12:40:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:49,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779409021] [2021-08-21 12:40:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:49,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:49,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779409021] [2021-08-21 12:40:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779409021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051965842] [2021-08-21 12:40:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:40:49,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:49,708 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 12:40:49,709 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 12:40:53,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:40:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:53,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:53,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:54,209 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:40:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:40:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:54,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051965842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:54,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:54,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 12:40:54,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021053080] [2021-08-21 12:40:54,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:40:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:40:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:40:54,276 INFO L87 Difference]: Start difference. First operand 1320 states and 2629 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:54,789 INFO L93 Difference]: Finished difference Result 2292 states and 4651 transitions. [2021-08-21 12:40:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:40:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:54,792 INFO L225 Difference]: With dead ends: 2292 [2021-08-21 12:40:54,792 INFO L226 Difference]: Without dead ends: 2250 [2021-08-21 12:40:54,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:40:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-08-21 12:40:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 1335. [2021-08-21 12:40:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.9955022488755623) internal successors, (2662), 1334 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2662 transitions. [2021-08-21 12:40:54,807 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2662 transitions. Word has length 36 [2021-08-21 12:40:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:54,807 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 2662 transitions. [2021-08-21 12:40:54,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2662 transitions. [2021-08-21 12:40:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:54,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:54,809 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:54,834 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 12:40:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:40:55,033 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1363195214, now seen corresponding path program 65 times [2021-08-21 12:40:55,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:55,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671029361] [2021-08-21 12:40:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:55,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:55,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:55,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671029361] [2021-08-21 12:40:55,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671029361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:55,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770226581] [2021-08-21 12:40:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:40:55,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:55,399 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 12:40:55,400 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 12:40:58,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:40:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:58,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:40:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:59,684 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 12:40:59,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 12:40:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:59,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770226581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:59,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:59,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:40:59,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647915760] [2021-08-21 12:40:59,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:40:59,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:59,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:40:59,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:40:59,735 INFO L87 Difference]: Start difference. First operand 1335 states and 2662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:00,215 INFO L93 Difference]: Finished difference Result 2430 states and 4906 transitions. [2021-08-21 12:41:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:41:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:00,218 INFO L225 Difference]: With dead ends: 2430 [2021-08-21 12:41:00,218 INFO L226 Difference]: Without dead ends: 2385 [2021-08-21 12:41:00,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:41:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-08-21 12:41:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1335. [2021-08-21 12:41:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.9955022488755623) internal successors, (2662), 1334 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2662 transitions. [2021-08-21 12:41:00,234 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2662 transitions. Word has length 36 [2021-08-21 12:41:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:00,234 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 2662 transitions. [2021-08-21 12:41:00,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2662 transitions. [2021-08-21 12:41:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:00,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:00,236 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:00,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 12:41:00,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:00,461 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 657957916, now seen corresponding path program 66 times [2021-08-21 12:41:00,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:00,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285151271] [2021-08-21 12:41:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:00,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:00,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:00,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285151271] [2021-08-21 12:41:00,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285151271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:00,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111404840] [2021-08-21 12:41:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:41:00,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:00,800 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 12:41:00,802 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 12:41:04,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:41:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:04,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:05,721 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-21 12:41:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 12:41:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:05,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111404840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:05,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:05,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:41:05,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433194299] [2021-08-21 12:41:05,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:41:05,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:05,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:41:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:41:05,778 INFO L87 Difference]: Start difference. First operand 1335 states and 2662 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:08,921 INFO L93 Difference]: Finished difference Result 2454 states and 4960 transitions. [2021-08-21 12:41:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:41:08,922 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:08,924 INFO L225 Difference]: With dead ends: 2454 [2021-08-21 12:41:08,924 INFO L226 Difference]: Without dead ends: 2362 [2021-08-21 12:41:08,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1793.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:41:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-08-21 12:41:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1409. [2021-08-21 12:41:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.0177556818181817) internal successors, (2841), 1408 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2841 transitions. [2021-08-21 12:41:08,939 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2841 transitions. Word has length 36 [2021-08-21 12:41:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:08,939 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 2841 transitions. [2021-08-21 12:41:08,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2841 transitions. [2021-08-21 12:41:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:08,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:08,940 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:08,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:09,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 12:41:09,157 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash -893673324, now seen corresponding path program 67 times [2021-08-21 12:41:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130091273] [2021-08-21 12:41:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:09,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:09,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:09,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130091273] [2021-08-21 12:41:09,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130091273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:09,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138243367] [2021-08-21 12:41:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:41:09,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:09,538 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 12:41:09,539 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 12:41:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:13,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:14,149 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138243367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:14,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:14,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:41:14,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795891227] [2021-08-21 12:41:14,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:41:14,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:41:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:41:14,218 INFO L87 Difference]: Start difference. First operand 1409 states and 2841 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:14,604 INFO L93 Difference]: Finished difference Result 2124 states and 4312 transitions. [2021-08-21 12:41:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:41:14,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:14,606 INFO L225 Difference]: With dead ends: 2124 [2021-08-21 12:41:14,606 INFO L226 Difference]: Without dead ends: 2101 [2021-08-21 12:41:14,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 674.8ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:41:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-08-21 12:41:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1415. [2021-08-21 12:41:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 2.0183875530410185) internal successors, (2854), 1414 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2854 transitions. [2021-08-21 12:41:14,620 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2854 transitions. Word has length 36 [2021-08-21 12:41:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2854 transitions. [2021-08-21 12:41:14,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2854 transitions. [2021-08-21 12:41:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:14,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:14,621 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:14,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:14,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:14,847 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1150667582, now seen corresponding path program 68 times [2021-08-21 12:41:14,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:14,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661458999] [2021-08-21 12:41:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:14,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:41:15,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:15,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661458999] [2021-08-21 12:41:15,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661458999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:15,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003570953] [2021-08-21 12:41:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:41:15,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:15,188 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 12:41:15,189 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 12:41:19,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:41:19,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:19,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:20,037 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:20,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:20,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003570953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:20,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:20,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:41:20,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425718483] [2021-08-21 12:41:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:41:20,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:41:20,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:41:20,081 INFO L87 Difference]: Start difference. First operand 1415 states and 2854 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:20,423 INFO L93 Difference]: Finished difference Result 2206 states and 4481 transitions. [2021-08-21 12:41:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:41:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:20,425 INFO L225 Difference]: With dead ends: 2206 [2021-08-21 12:41:20,425 INFO L226 Difference]: Without dead ends: 2147 [2021-08-21 12:41:20,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:41:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-08-21 12:41:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1487. [2021-08-21 12:41:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.0114401076716018) internal successors, (2989), 1486 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2989 transitions. [2021-08-21 12:41:20,441 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2989 transitions. Word has length 36 [2021-08-21 12:41:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 2989 transitions. [2021-08-21 12:41:20,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2989 transitions. [2021-08-21 12:41:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:20,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:20,443 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:20,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:20,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:20,669 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1690502612, now seen corresponding path program 69 times [2021-08-21 12:41:20,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:20,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546444012] [2021-08-21 12:41:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:20,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:21,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:21,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546444012] [2021-08-21 12:41:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546444012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:21,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487969000] [2021-08-21 12:41:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:41:21,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:21,102 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 12:41:21,103 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 12:41:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:41:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:24,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:26,513 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-21 12:41:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 12:41:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487969000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:26,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:41:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112253870] [2021-08-21 12:41:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:41:26,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:41:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:41:26,552 INFO L87 Difference]: Start difference. First operand 1487 states and 2989 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:29,952 INFO L93 Difference]: Finished difference Result 2531 states and 5085 transitions. [2021-08-21 12:41:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:41:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:29,955 INFO L225 Difference]: With dead ends: 2531 [2021-08-21 12:41:29,955 INFO L226 Difference]: Without dead ends: 2400 [2021-08-21 12:41:29,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2895.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:41:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-21 12:41:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1577. [2021-08-21 12:41:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.0107868020304567) internal successors, (3169), 1576 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 3169 transitions. [2021-08-21 12:41:29,971 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 3169 transitions. Word has length 36 [2021-08-21 12:41:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:29,971 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 3169 transitions. [2021-08-21 12:41:29,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 3169 transitions. [2021-08-21 12:41:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:29,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:29,973 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:30,000 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 12:41:30,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:30,189 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash -583311554, now seen corresponding path program 70 times [2021-08-21 12:41:30,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:30,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725128254] [2021-08-21 12:41:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:30,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:30,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:30,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725128254] [2021-08-21 12:41:30,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725128254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:30,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391822112] [2021-08-21 12:41:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:41:30,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:30,544 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 12:41:30,545 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 12:41:34,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:41:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:34,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:35,388 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:35,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:35,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391822112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:35,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:35,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:41:35,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691526520] [2021-08-21 12:41:35,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:41:35,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:35,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:41:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:41:35,428 INFO L87 Difference]: Start difference. First operand 1577 states and 3169 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:35,863 INFO L93 Difference]: Finished difference Result 2210 states and 4469 transitions. [2021-08-21 12:41:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:41:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:35,866 INFO L225 Difference]: With dead ends: 2210 [2021-08-21 12:41:35,866 INFO L226 Difference]: Without dead ends: 2188 [2021-08-21 12:41:35,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:41:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-21 12:41:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1577. [2021-08-21 12:41:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.0107868020304567) internal successors, (3169), 1576 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 3169 transitions. [2021-08-21 12:41:35,881 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 3169 transitions. Word has length 36 [2021-08-21 12:41:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:35,882 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 3169 transitions. [2021-08-21 12:41:35,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 3169 transitions. [2021-08-21 12:41:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:35,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:35,883 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:35,912 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 12:41:36,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-21 12:41:36,097 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash 746797890, now seen corresponding path program 71 times [2021-08-21 12:41:36,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:36,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048293454] [2021-08-21 12:41:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:36,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:41:36,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:36,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048293454] [2021-08-21 12:41:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048293454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:36,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559399197] [2021-08-21 12:41:36,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:41:36,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:36,504 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 12:41:36,505 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 12:41:40,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:41:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:40,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:41:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:41,375 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:41,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559399197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:41,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:41,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:41:41,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391982530] [2021-08-21 12:41:41,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:41:41,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:41:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:41:41,414 INFO L87 Difference]: Start difference. First operand 1577 states and 3169 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:41,884 INFO L93 Difference]: Finished difference Result 2488 states and 5030 transitions. [2021-08-21 12:41:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:41:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:41,886 INFO L225 Difference]: With dead ends: 2488 [2021-08-21 12:41:41,886 INFO L226 Difference]: Without dead ends: 2245 [2021-08-21 12:41:41,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-08-21 12:41:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 1567. [2021-08-21 12:41:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 2.003192848020434) internal successors, (3137), 1566 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3137 transitions. [2021-08-21 12:41:41,902 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3137 transitions. Word has length 36 [2021-08-21 12:41:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:41,902 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 3137 transitions. [2021-08-21 12:41:41,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3137 transitions. [2021-08-21 12:41:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:41,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:41,903 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:41,932 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 12:41:42,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:42,129 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1579457052, now seen corresponding path program 72 times [2021-08-21 12:41:42,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:42,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313573322] [2021-08-21 12:41:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:42,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:42,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:42,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313573322] [2021-08-21 12:41:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313573322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:42,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959150676] [2021-08-21 12:41:42,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:41:42,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:42,521 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 12:41:42,554 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 12:41:46,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:41:46,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:46,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:41:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:47,563 INFO L354 Elim1Store]: treesize reduction 404, result has 3.1 percent of original size [2021-08-21 12:41:47,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 101 treesize of output 59 [2021-08-21 12:41:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:47,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959150676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:47,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:47,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:41:47,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937652983] [2021-08-21 12:41:47,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:41:47,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:41:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:47,602 INFO L87 Difference]: Start difference. First operand 1567 states and 3137 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:48,008 INFO L93 Difference]: Finished difference Result 2724 states and 5504 transitions. [2021-08-21 12:41:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:41:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:48,011 INFO L225 Difference]: With dead ends: 2724 [2021-08-21 12:41:48,011 INFO L226 Difference]: Without dead ends: 2661 [2021-08-21 12:41:48,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-08-21 12:41:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1606. [2021-08-21 12:41:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 2.001246105919003) internal successors, (3212), 1605 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 3212 transitions. [2021-08-21 12:41:48,034 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 3212 transitions. Word has length 36 [2021-08-21 12:41:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:48,034 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 3212 transitions. [2021-08-21 12:41:48,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 3212 transitions. [2021-08-21 12:41:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:48,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:48,036 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:48,065 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 12:41:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:48,261 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash -694357114, now seen corresponding path program 73 times [2021-08-21 12:41:48,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:48,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082113601] [2021-08-21 12:41:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:48,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:48,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:48,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082113601] [2021-08-21 12:41:48,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082113601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:48,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925187979] [2021-08-21 12:41:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:41:48,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:48,674 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 12:41:48,674 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 12:41:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:52,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:53,670 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:53,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925187979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:53,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:41:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356512138] [2021-08-21 12:41:53,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:41:53,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:41:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:53,711 INFO L87 Difference]: Start difference. First operand 1606 states and 3212 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:54,081 INFO L93 Difference]: Finished difference Result 2331 states and 4695 transitions. [2021-08-21 12:41:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:41:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:54,083 INFO L225 Difference]: With dead ends: 2331 [2021-08-21 12:41:54,083 INFO L226 Difference]: Without dead ends: 2309 [2021-08-21 12:41:54,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-08-21 12:41:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1612. [2021-08-21 12:41:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 2.001241464928616) internal successors, (3224), 1611 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3224 transitions. [2021-08-21 12:41:54,098 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3224 transitions. Word has length 36 [2021-08-21 12:41:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:54,098 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 3224 transitions. [2021-08-21 12:41:54,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3224 transitions. [2021-08-21 12:41:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:54,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:54,100 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:54,126 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 12:41:54,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:41:54,325 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2048978942, now seen corresponding path program 74 times [2021-08-21 12:41:54,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:54,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424874047] [2021-08-21 12:41:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:54,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:54,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:54,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424874047] [2021-08-21 12:41:54,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424874047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:54,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892379611] [2021-08-21 12:41:54,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:41:54,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:54,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:54,743 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 12:41:54,787 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 12:41:58,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:41:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:58,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:41:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:59,898 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:41:59,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:41:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892379611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:59,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:41:59,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473690523] [2021-08-21 12:41:59,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:41:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:41:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:59,938 INFO L87 Difference]: Start difference. First operand 1612 states and 3224 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:00,388 INFO L93 Difference]: Finished difference Result 2275 states and 4588 transitions. [2021-08-21 12:42:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:42:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:00,391 INFO L225 Difference]: With dead ends: 2275 [2021-08-21 12:42:00,391 INFO L226 Difference]: Without dead ends: 2252 [2021-08-21 12:42:00,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 649.8ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-08-21 12:42:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1612. [2021-08-21 12:42:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 2.001241464928616) internal successors, (3224), 1611 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3224 transitions. [2021-08-21 12:42:00,407 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3224 transitions. Word has length 36 [2021-08-21 12:42:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:00,407 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 3224 transitions. [2021-08-21 12:42:00,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3224 transitions. [2021-08-21 12:42:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:00,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:00,409 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:00,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 12:42:00,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 12:42:00,609 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -162781096, now seen corresponding path program 75 times [2021-08-21 12:42:00,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:00,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70010824] [2021-08-21 12:42:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:00,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:42:01,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:01,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70010824] [2021-08-21 12:42:01,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70010824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:01,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220518536] [2021-08-21 12:42:01,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:42:01,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:01,002 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 12:42:01,002 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 12:42:05,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:42:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:05,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:42:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:06,312 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220518536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:06,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:06,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:42:06,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508131245] [2021-08-21 12:42:06,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:42:06,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:42:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:42:06,337 INFO L87 Difference]: Start difference. First operand 1612 states and 3224 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:06,543 INFO L93 Difference]: Finished difference Result 2481 states and 4973 transitions. [2021-08-21 12:42:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:42:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:06,545 INFO L225 Difference]: With dead ends: 2481 [2021-08-21 12:42:06,546 INFO L226 Difference]: Without dead ends: 2286 [2021-08-21 12:42:06,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:42:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-08-21 12:42:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1684. [2021-08-21 12:42:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.9988116458704694) internal successors, (3364), 1683 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 3364 transitions. [2021-08-21 12:42:06,561 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 3364 transitions. Word has length 36 [2021-08-21 12:42:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:06,561 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 3364 transitions. [2021-08-21 12:42:06,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 3364 transitions. [2021-08-21 12:42:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:06,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:06,563 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:06,591 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 12:42:06,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:06,789 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1636753200, now seen corresponding path program 76 times [2021-08-21 12:42:06,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:06,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814013963] [2021-08-21 12:42:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:06,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:07,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:07,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814013963] [2021-08-21 12:42:07,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814013963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:07,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973240889] [2021-08-21 12:42:07,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:42:07,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:07,234 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 12:42:07,235 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 12:42:11,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:42:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:11,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:12,154 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:12,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973240889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:12,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:42:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125254454] [2021-08-21 12:42:12,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:42:12,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:42:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:42:12,180 INFO L87 Difference]: Start difference. First operand 1684 states and 3364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:12,423 INFO L93 Difference]: Finished difference Result 3113 states and 6281 transitions. [2021-08-21 12:42:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:42:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:12,426 INFO L225 Difference]: With dead ends: 3113 [2021-08-21 12:42:12,426 INFO L226 Difference]: Without dead ends: 3054 [2021-08-21 12:42:12,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:42:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-08-21 12:42:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 1675. [2021-08-21 12:42:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 1.997610513739546) internal successors, (3344), 1674 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 3344 transitions. [2021-08-21 12:42:12,446 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 3344 transitions. Word has length 36 [2021-08-21 12:42:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:12,446 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 3344 transitions. [2021-08-21 12:42:12,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 3344 transitions. [2021-08-21 12:42:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:12,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:12,448 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:12,478 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 12:42:12,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:12,669 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash 669878066, now seen corresponding path program 77 times [2021-08-21 12:42:12,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:12,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400391161] [2021-08-21 12:42:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:12,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:12,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:12,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400391161] [2021-08-21 12:42:12,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400391161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:12,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292591835] [2021-08-21 12:42:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:42:12,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:12,971 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 12:42:12,972 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 12:42:17,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:42:17,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:17,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:18,231 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:18,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292591835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:18,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:42:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673612151] [2021-08-21 12:42:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:42:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:42:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:18,271 INFO L87 Difference]: Start difference. First operand 1675 states and 3344 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:18,720 INFO L93 Difference]: Finished difference Result 2864 states and 5787 transitions. [2021-08-21 12:42:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:42:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:18,723 INFO L225 Difference]: With dead ends: 2864 [2021-08-21 12:42:18,723 INFO L226 Difference]: Without dead ends: 2801 [2021-08-21 12:42:18,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-08-21 12:42:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 1702. [2021-08-21 12:42:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.9976484420928866) internal successors, (3398), 1701 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 3398 transitions. [2021-08-21 12:42:18,742 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 3398 transitions. Word has length 36 [2021-08-21 12:42:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:18,742 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 3398 transitions. [2021-08-21 12:42:18,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 3398 transitions. [2021-08-21 12:42:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:18,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:18,745 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:18,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:18,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-21 12:42:18,961 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1603936100, now seen corresponding path program 78 times [2021-08-21 12:42:18,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:18,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699174892] [2021-08-21 12:42:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:18,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:19,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:19,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699174892] [2021-08-21 12:42:19,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699174892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:19,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311447095] [2021-08-21 12:42:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:42:19,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:19,316 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 12:42:19,318 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 12:42:23,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:42:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:23,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:24,825 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:24,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:24,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311447095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:24,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:24,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:42:24,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747682875] [2021-08-21 12:42:24,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:42:24,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:42:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:24,864 INFO L87 Difference]: Start difference. First operand 1702 states and 3398 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:25,360 INFO L93 Difference]: Finished difference Result 2357 states and 4739 transitions. [2021-08-21 12:42:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:42:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:25,363 INFO L225 Difference]: With dead ends: 2357 [2021-08-21 12:42:25,363 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 12:42:25,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 12:42:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1711. [2021-08-21 12:42:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.9976608187134504) internal successors, (3416), 1710 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 3416 transitions. [2021-08-21 12:42:25,379 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 3416 transitions. Word has length 36 [2021-08-21 12:42:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:25,379 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 3416 transitions. [2021-08-21 12:42:25,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 3416 transitions. [2021-08-21 12:42:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:25,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:25,381 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:25,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:42:25,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:25,597 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1139399956, now seen corresponding path program 79 times [2021-08-21 12:42:25,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:25,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703024439] [2021-08-21 12:42:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:25,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:26,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:26,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703024439] [2021-08-21 12:42:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703024439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:26,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276562155] [2021-08-21 12:42:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:42:26,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:26,050 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 12:42:26,051 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 12:42:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:30,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:31,595 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:31,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276562155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:31,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:31,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:42:31,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633887108] [2021-08-21 12:42:31,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:42:31,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:42:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:31,634 INFO L87 Difference]: Start difference. First operand 1711 states and 3416 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:32,100 INFO L93 Difference]: Finished difference Result 2316 states and 4660 transitions. [2021-08-21 12:42:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:42:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:32,103 INFO L225 Difference]: With dead ends: 2316 [2021-08-21 12:42:32,103 INFO L226 Difference]: Without dead ends: 2293 [2021-08-21 12:42:32,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-08-21 12:42:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1711. [2021-08-21 12:42:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.9976608187134504) internal successors, (3416), 1710 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 3416 transitions. [2021-08-21 12:42:32,118 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 3416 transitions. Word has length 36 [2021-08-21 12:42:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:32,118 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 3416 transitions. [2021-08-21 12:42:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 3416 transitions. [2021-08-21 12:42:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:32,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:32,120 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:32,150 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 12:42:32,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:32,349 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2142340094, now seen corresponding path program 80 times [2021-08-21 12:42:32,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:32,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765105739] [2021-08-21 12:42:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:32,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:32,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:32,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765105739] [2021-08-21 12:42:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765105739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:32,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795671069] [2021-08-21 12:42:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:42:32,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:32,777 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 12:42:32,778 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 12:42:37,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:42:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:37,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:38,246 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:38,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795671069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:38,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:38,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:42:38,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840188356] [2021-08-21 12:42:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:42:38,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:42:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:38,278 INFO L87 Difference]: Start difference. First operand 1711 states and 3416 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:38,489 INFO L93 Difference]: Finished difference Result 2240 states and 4504 transitions. [2021-08-21 12:42:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:42:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:38,492 INFO L225 Difference]: With dead ends: 2240 [2021-08-21 12:42:38,492 INFO L226 Difference]: Without dead ends: 2216 [2021-08-21 12:42:38,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-21 12:42:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1714. [2021-08-21 12:42:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.9976649153531816) internal successors, (3422), 1713 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 3422 transitions. [2021-08-21 12:42:38,520 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 3422 transitions. Word has length 36 [2021-08-21 12:42:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:38,520 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 3422 transitions. [2021-08-21 12:42:38,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 3422 transitions. [2021-08-21 12:42:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:38,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:38,522 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:38,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 12:42:38,741 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1444944292, now seen corresponding path program 81 times [2021-08-21 12:42:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:38,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203067060] [2021-08-21 12:42:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:38,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:42:39,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203067060] [2021-08-21 12:42:39,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203067060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546493215] [2021-08-21 12:42:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:42:39,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:39,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:39,147 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 12:42:39,147 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 12:42:43,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:42:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:43,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:44,806 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:44,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546493215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:44,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:44,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 12:42:44,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392948854] [2021-08-21 12:42:44,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:42:44,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:42:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:42:44,872 INFO L87 Difference]: Start difference. First operand 1714 states and 3422 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:45,404 INFO L93 Difference]: Finished difference Result 3595 states and 7270 transitions. [2021-08-21 12:42:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:42:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:45,409 INFO L225 Difference]: With dead ends: 3595 [2021-08-21 12:42:45,409 INFO L226 Difference]: Without dead ends: 3552 [2021-08-21 12:42:45,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:42:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-08-21 12:42:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1785. [2021-08-21 12:42:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 1.992152466367713) internal successors, (3554), 1784 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3554 transitions. [2021-08-21 12:42:45,431 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3554 transitions. Word has length 36 [2021-08-21 12:42:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:45,431 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 3554 transitions. [2021-08-21 12:42:45,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3554 transitions. [2021-08-21 12:42:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:45,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:45,433 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:45,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:42:45,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:45,635 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2040716316, now seen corresponding path program 82 times [2021-08-21 12:42:45,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:45,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986872903] [2021-08-21 12:42:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:45,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:46,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:46,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986872903] [2021-08-21 12:42:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986872903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:46,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60868403] [2021-08-21 12:42:46,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:42:46,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:46,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:46,020 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 12:42:46,021 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 12:42:50,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:42:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:50,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:42:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:51,635 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:51,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60868403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:51,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:51,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:42:51,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695184881] [2021-08-21 12:42:51,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:42:51,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:42:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:42:51,703 INFO L87 Difference]: Start difference. First operand 1785 states and 3554 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:52,328 INFO L93 Difference]: Finished difference Result 3652 states and 7393 transitions. [2021-08-21 12:42:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:42:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:52,333 INFO L225 Difference]: With dead ends: 3652 [2021-08-21 12:42:52,333 INFO L226 Difference]: Without dead ends: 3604 [2021-08-21 12:42:52,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:42:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-08-21 12:42:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 1869. [2021-08-21 12:42:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.9876873661670236) internal successors, (3713), 1868 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3713 transitions. [2021-08-21 12:42:52,366 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3713 transitions. Word has length 36 [2021-08-21 12:42:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:52,366 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 3713 transitions. [2021-08-21 12:42:52,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3713 transitions. [2021-08-21 12:42:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:52,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:52,368 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:52,410 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 12:42:52,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:52,593 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1929670756, now seen corresponding path program 83 times [2021-08-21 12:42:52,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:52,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982839951] [2021-08-21 12:42:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:52,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:52,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:52,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982839951] [2021-08-21 12:42:52,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982839951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:52,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367637054] [2021-08-21 12:42:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:42:52,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:52,920 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 12:42:52,921 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 12:42:57,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:42:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:57,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:42:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:58,529 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:42:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:42:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367637054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:58,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:42:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10546760] [2021-08-21 12:42:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:42:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:42:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:42:58,602 INFO L87 Difference]: Start difference. First operand 1869 states and 3713 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:59,045 INFO L93 Difference]: Finished difference Result 3832 states and 7720 transitions. [2021-08-21 12:42:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:42:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:59,049 INFO L225 Difference]: With dead ends: 3832 [2021-08-21 12:42:59,049 INFO L226 Difference]: Without dead ends: 3723 [2021-08-21 12:42:59,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:42:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-08-21 12:42:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 1998. [2021-08-21 12:42:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 1.9904857285928894) internal successors, (3975), 1997 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3975 transitions. [2021-08-21 12:42:59,094 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3975 transitions. Word has length 36 [2021-08-21 12:42:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 3975 transitions. [2021-08-21 12:42:59,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3975 transitions. [2021-08-21 12:42:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:59,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:59,099 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:59,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:42:59,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 12:42:59,313 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:42:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 378039516, now seen corresponding path program 84 times [2021-08-21 12:42:59,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:59,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784041660] [2021-08-21 12:42:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:59,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:59,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:59,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784041660] [2021-08-21 12:42:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784041660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:59,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304451026] [2021-08-21 12:42:59,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:42:59,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:59,621 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 12:42:59,623 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 12:43:04,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:43:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:04,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:05,612 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304451026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:05,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 12:43:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998672748] [2021-08-21 12:43:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:43:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:43:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:05,680 INFO L87 Difference]: Start difference. First operand 1998 states and 3975 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:06,319 INFO L93 Difference]: Finished difference Result 3713 states and 7517 transitions. [2021-08-21 12:43:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:43:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:06,324 INFO L225 Difference]: With dead ends: 3713 [2021-08-21 12:43:06,324 INFO L226 Difference]: Without dead ends: 3668 [2021-08-21 12:43:06,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 766.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:43:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2021-08-21 12:43:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 2015. [2021-08-21 12:43:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9915590863952333) internal successors, (4011), 2014 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 4011 transitions. [2021-08-21 12:43:06,346 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 4011 transitions. Word has length 36 [2021-08-21 12:43:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:06,346 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 4011 transitions. [2021-08-21 12:43:06,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 4011 transitions. [2021-08-21 12:43:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:06,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:06,348 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:06,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 12:43:06,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:06,573 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash 688401286, now seen corresponding path program 85 times [2021-08-21 12:43:06,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:06,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711081835] [2021-08-21 12:43:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:06,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711081835] [2021-08-21 12:43:06,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711081835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895004194] [2021-08-21 12:43:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:43:06,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:06,946 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 12:43:06,947 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 12:43:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:11,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:12,764 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:12,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895004194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:12,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:43:12,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555048920] [2021-08-21 12:43:12,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:43:12,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:43:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:43:12,800 INFO L87 Difference]: Start difference. First operand 2015 states and 4011 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:13,185 INFO L93 Difference]: Finished difference Result 3107 states and 6254 transitions. [2021-08-21 12:43:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:43:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:13,188 INFO L225 Difference]: With dead ends: 3107 [2021-08-21 12:43:13,188 INFO L226 Difference]: Without dead ends: 3045 [2021-08-21 12:43:13,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-08-21 12:43:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2009. [2021-08-21 12:43:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9915338645418326) internal successors, (3999), 2008 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3999 transitions. [2021-08-21 12:43:13,208 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3999 transitions. Word has length 36 [2021-08-21 12:43:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:13,208 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 3999 transitions. [2021-08-21 12:43:13,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3999 transitions. [2021-08-21 12:43:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:13,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:13,210 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:13,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:13,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:13,425 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 577355726, now seen corresponding path program 86 times [2021-08-21 12:43:13,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:13,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002512514] [2021-08-21 12:43:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:13,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:13,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002512514] [2021-08-21 12:43:13,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002512514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:13,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362468928] [2021-08-21 12:43:13,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:43:13,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:13,739 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 12:43:13,740 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 12:43:18,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:43:18,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:18,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:19,731 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:19,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362468928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:19,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:19,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:43:19,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271397232] [2021-08-21 12:43:19,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:43:19,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:43:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:19,797 INFO L87 Difference]: Start difference. First operand 2009 states and 3999 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:20,311 INFO L93 Difference]: Finished difference Result 3092 states and 6221 transitions. [2021-08-21 12:43:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:43:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:20,315 INFO L225 Difference]: With dead ends: 3092 [2021-08-21 12:43:20,315 INFO L226 Difference]: Without dead ends: 3030 [2021-08-21 12:43:20,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-08-21 12:43:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2006. [2021-08-21 12:43:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9915211970074813) internal successors, (3993), 2005 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3993 transitions. [2021-08-21 12:43:20,335 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3993 transitions. Word has length 36 [2021-08-21 12:43:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 3993 transitions. [2021-08-21 12:43:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3993 transitions. [2021-08-21 12:43:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:20,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:20,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:20,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:20,553 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash -974275514, now seen corresponding path program 87 times [2021-08-21 12:43:20,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:20,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764209562] [2021-08-21 12:43:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:20,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:21,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:21,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764209562] [2021-08-21 12:43:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764209562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:21,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854282314] [2021-08-21 12:43:21,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:43:21,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:21,027 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 12:43:21,027 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 12:43:25,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:43:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:25,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:27,036 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854282314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:27,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:27,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:43:27,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374763681] [2021-08-21 12:43:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:43:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:43:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:27,075 INFO L87 Difference]: Start difference. First operand 2006 states and 3993 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:27,591 INFO L93 Difference]: Finished difference Result 3212 states and 6476 transitions. [2021-08-21 12:43:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:43:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:27,595 INFO L225 Difference]: With dead ends: 3212 [2021-08-21 12:43:27,595 INFO L226 Difference]: Without dead ends: 3147 [2021-08-21 12:43:27,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-08-21 12:43:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2030. [2021-08-21 12:43:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9901429275505176) internal successors, (4038), 2029 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4038 transitions. [2021-08-21 12:43:27,615 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4038 transitions. Word has length 36 [2021-08-21 12:43:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:27,615 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 4038 transitions. [2021-08-21 12:43:27,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4038 transitions. [2021-08-21 12:43:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:27,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:27,617 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:27,649 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 12:43:27,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-21 12:43:27,826 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:27,826 INFO L82 PathProgramCache]: Analyzing trace with hash -332223260, now seen corresponding path program 88 times [2021-08-21 12:43:27,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:27,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291131661] [2021-08-21 12:43:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:27,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:28,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:28,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291131661] [2021-08-21 12:43:28,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291131661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:28,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403762595] [2021-08-21 12:43:28,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:43:28,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:28,229 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 12:43:28,229 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 12:43:33,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:43:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:33,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:34,469 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403762595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:34,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:43:34,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098184018] [2021-08-21 12:43:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:43:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:43:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:34,507 INFO L87 Difference]: Start difference. First operand 2030 states and 4038 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:35,001 INFO L93 Difference]: Finished difference Result 3053 states and 6125 transitions. [2021-08-21 12:43:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:43:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:35,005 INFO L225 Difference]: With dead ends: 3053 [2021-08-21 12:43:35,005 INFO L226 Difference]: Without dead ends: 3011 [2021-08-21 12:43:35,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-08-21 12:43:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2024. [2021-08-21 12:43:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 1.9901136925358378) internal successors, (4026), 2023 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 4026 transitions. [2021-08-21 12:43:35,026 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 4026 transitions. Word has length 36 [2021-08-21 12:43:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:35,026 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 4026 transitions. [2021-08-21 12:43:35,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 4026 transitions. [2021-08-21 12:43:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:35,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:35,028 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:35,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:35,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:35,241 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1883854500, now seen corresponding path program 89 times [2021-08-21 12:43:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:35,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021587676] [2021-08-21 12:43:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:35,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:35,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:35,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021587676] [2021-08-21 12:43:35,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021587676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:35,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042695772] [2021-08-21 12:43:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:43:35,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:35,648 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 12:43:35,649 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 12:43:40,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:43:40,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:40,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:41,964 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:41,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:42,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042695772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:42,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:42,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:43:42,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113021872] [2021-08-21 12:43:42,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:43:42,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:43:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:42,003 INFO L87 Difference]: Start difference. First operand 2024 states and 4026 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:42,649 INFO L93 Difference]: Finished difference Result 2939 states and 5888 transitions. [2021-08-21 12:43:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:43:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:42,653 INFO L225 Difference]: With dead ends: 2939 [2021-08-21 12:43:42,653 INFO L226 Difference]: Without dead ends: 2916 [2021-08-21 12:43:42,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-08-21 12:43:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2027. [2021-08-21 12:43:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 1.9901283316880554) internal successors, (4032), 2026 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 4032 transitions. [2021-08-21 12:43:42,672 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 4032 transitions. Word has length 36 [2021-08-21 12:43:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:42,672 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 4032 transitions. [2021-08-21 12:43:42,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 4032 transitions. [2021-08-21 12:43:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:42,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:42,674 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:42,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:42,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:42,901 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -880914362, now seen corresponding path program 90 times [2021-08-21 12:43:42,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:42,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734354900] [2021-08-21 12:43:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:42,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:43,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:43,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734354900] [2021-08-21 12:43:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734354900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:43,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276110153] [2021-08-21 12:43:43,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:43:43,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:43,303 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 12:43:43,304 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 12:43:48,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:43:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:48,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:49,749 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:49,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276110153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:49,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:49,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:43:49,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046895632] [2021-08-21 12:43:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:43:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:43:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:43:49,787 INFO L87 Difference]: Start difference. First operand 2027 states and 4032 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:50,377 INFO L93 Difference]: Finished difference Result 2947 states and 5905 transitions. [2021-08-21 12:43:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:43:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:50,381 INFO L225 Difference]: With dead ends: 2947 [2021-08-21 12:43:50,381 INFO L226 Difference]: Without dead ends: 2923 [2021-08-21 12:43:50,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:43:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-21 12:43:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2024. [2021-08-21 12:43:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 1.9901136925358378) internal successors, (4026), 2023 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 4026 transitions. [2021-08-21 12:43:50,401 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 4026 transitions. Word has length 36 [2021-08-21 12:43:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:50,401 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 4026 transitions. [2021-08-21 12:43:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 4026 transitions. [2021-08-21 12:43:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:50,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:50,403 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:50,436 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 12:43:50,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:50,615 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash -388811044, now seen corresponding path program 91 times [2021-08-21 12:43:50,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:50,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538785767] [2021-08-21 12:43:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:50,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:43:51,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:51,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538785767] [2021-08-21 12:43:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538785767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:51,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186496665] [2021-08-21 12:43:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:43:51,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:51,080 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 12:43:51,081 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 12:43:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:56,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:43:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:57,095 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:43:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:43:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:57,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186496665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:57,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:57,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-08-21 12:43:57,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800418168] [2021-08-21 12:43:57,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:43:57,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:43:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:43:57,132 INFO L87 Difference]: Start difference. First operand 2024 states and 4026 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,498 INFO L93 Difference]: Finished difference Result 3212 states and 6452 transitions. [2021-08-21 12:43:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:43:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:43:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,501 INFO L225 Difference]: With dead ends: 3212 [2021-08-21 12:43:57,501 INFO L226 Difference]: Without dead ends: 3031 [2021-08-21 12:43:57,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:43:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-08-21 12:43:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2162. [2021-08-21 12:43:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.982415548357242) internal successors, (4284), 2161 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 4284 transitions. [2021-08-21 12:43:57,522 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 4284 transitions. Word has length 36 [2021-08-21 12:43:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,522 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 4284 transitions. [2021-08-21 12:43:57,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 4284 transitions. [2021-08-21 12:43:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:43:57,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,524 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:57,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:57,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,750 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:43:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,750 INFO L82 PathProgramCache]: Analyzing trace with hash -859146310, now seen corresponding path program 92 times [2021-08-21 12:43:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150207031] [2021-08-21 12:43:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:43:58,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:58,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150207031] [2021-08-21 12:43:58,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150207031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:58,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122542892] [2021-08-21 12:43:58,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:43:58,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:58,095 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 12:43:58,096 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 12:44:03,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:03,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:04,588 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:04,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122542892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:04,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:04,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-08-21 12:44:04,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974685098] [2021-08-21 12:44:04,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:44:04,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:44:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:44:04,625 INFO L87 Difference]: Start difference. First operand 2162 states and 4284 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:04,994 INFO L93 Difference]: Finished difference Result 3040 states and 6081 transitions. [2021-08-21 12:44:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:44:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:04,997 INFO L225 Difference]: With dead ends: 3040 [2021-08-21 12:44:04,997 INFO L226 Difference]: Without dead ends: 2832 [2021-08-21 12:44:04,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:44:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-08-21 12:44:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2078. [2021-08-21 12:44:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 1.984593163216177) internal successors, (4122), 2077 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 4122 transitions. [2021-08-21 12:44:05,018 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 4122 transitions. Word has length 36 [2021-08-21 12:44:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:05,018 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 4122 transitions. [2021-08-21 12:44:05,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 4122 transitions. [2021-08-21 12:44:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:05,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:05,020 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:05,054 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 12:44:05,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:44:05,237 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1994665982, now seen corresponding path program 93 times [2021-08-21 12:44:05,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:05,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291147427] [2021-08-21 12:44:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:05,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:05,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:05,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291147427] [2021-08-21 12:44:05,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291147427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:05,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850743562] [2021-08-21 12:44:05,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:05,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:05,621 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 12:44:05,622 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 12:44:11,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:44:11,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:11,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:12,120 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850743562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:12,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:12,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:44:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117512581] [2021-08-21 12:44:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:44:12,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:44:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:44:12,149 INFO L87 Difference]: Start difference. First operand 2078 states and 4122 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:12,428 INFO L93 Difference]: Finished difference Result 2788 states and 5617 transitions. [2021-08-21 12:44:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:44:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:12,431 INFO L225 Difference]: With dead ends: 2788 [2021-08-21 12:44:12,431 INFO L226 Difference]: Without dead ends: 2731 [2021-08-21 12:44:12,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:44:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-08-21 12:44:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2069. [2021-08-21 12:44:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 1.9845261121856868) internal successors, (4104), 2068 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 4104 transitions. [2021-08-21 12:44:12,449 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 4104 transitions. Word has length 36 [2021-08-21 12:44:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:12,450 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 4104 transitions. [2021-08-21 12:44:12,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 4104 transitions. [2021-08-21 12:44:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:12,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:12,451 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:12,485 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 12:44:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 12:44:12,665 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -970191870, now seen corresponding path program 94 times [2021-08-21 12:44:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39475962] [2021-08-21 12:44:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:12,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:12,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39475962] [2021-08-21 12:44:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39475962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772282066] [2021-08-21 12:44:12,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:12,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:12,924 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 12:44:12,925 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 12:44:18,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:18,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:18,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:19,211 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:19,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772282066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:19,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:19,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:44:19,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001218674] [2021-08-21 12:44:19,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:44:19,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:44:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:44:19,237 INFO L87 Difference]: Start difference. First operand 2069 states and 4104 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:19,634 INFO L93 Difference]: Finished difference Result 2939 states and 5896 transitions. [2021-08-21 12:44:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:44:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:19,638 INFO L225 Difference]: With dead ends: 2939 [2021-08-21 12:44:19,638 INFO L226 Difference]: Without dead ends: 2736 [2021-08-21 12:44:19,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:44:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-08-21 12:44:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2015. [2021-08-21 12:44:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.987090367428004) internal successors, (4002), 2014 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 4002 transitions. [2021-08-21 12:44:19,657 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 4002 transitions. Word has length 36 [2021-08-21 12:44:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:19,657 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 4002 transitions. [2021-08-21 12:44:19,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 4002 transitions. [2021-08-21 12:44:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:19,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:19,658 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:19,691 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 12:44:19,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 12:44:19,872 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1883620422, now seen corresponding path program 95 times [2021-08-21 12:44:19,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:19,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513557752] [2021-08-21 12:44:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:19,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:20,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:20,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513557752] [2021-08-21 12:44:20,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513557752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:20,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622764421] [2021-08-21 12:44:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:20,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:20,212 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 12:44:20,212 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 12:44:25,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:44:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:25,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:44:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:28,506 INFO L354 Elim1Store]: treesize reduction 453, result has 3.4 percent of original size [2021-08-21 12:44:28,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 80 treesize of output 63 [2021-08-21 12:44:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:28,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622764421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:28,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:28,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 12:44:28,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205535883] [2021-08-21 12:44:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:44:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:44:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:44:28,558 INFO L87 Difference]: Start difference. First operand 2015 states and 4002 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:34,101 INFO L93 Difference]: Finished difference Result 3002 states and 6030 transitions. [2021-08-21 12:44:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:44:34,101 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:34,104 INFO L225 Difference]: With dead ends: 3002 [2021-08-21 12:44:34,104 INFO L226 Difference]: Without dead ends: 2858 [2021-08-21 12:44:34,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 5198.0ms TimeCoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:44:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-08-21 12:44:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2087. [2021-08-21 12:44:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 1.988974113135187) internal successors, (4149), 2086 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 4149 transitions. [2021-08-21 12:44:34,124 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 4149 transitions. Word has length 36 [2021-08-21 12:44:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:34,124 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 4149 transitions. [2021-08-21 12:44:34,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 4149 transitions. [2021-08-21 12:44:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:34,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:34,126 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:34,159 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 12:44:34,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:34,353 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash 331989182, now seen corresponding path program 96 times [2021-08-21 12:44:34,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:34,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555906275] [2021-08-21 12:44:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:34,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:34,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:34,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555906275] [2021-08-21 12:44:34,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555906275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:34,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097271982] [2021-08-21 12:44:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:34,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:34,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:34,753 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 12:44:34,753 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 12:44:40,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:44:40,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:40,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:41,556 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:41,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:41,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097271982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:41,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:41,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:44:41,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134791118] [2021-08-21 12:44:41,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:44:41,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:44:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:44:41,596 INFO L87 Difference]: Start difference. First operand 2087 states and 4149 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:41,976 INFO L93 Difference]: Finished difference Result 2780 states and 5579 transitions. [2021-08-21 12:44:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:44:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:41,979 INFO L225 Difference]: With dead ends: 2780 [2021-08-21 12:44:41,979 INFO L226 Difference]: Without dead ends: 2757 [2021-08-21 12:44:41,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:44:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-08-21 12:44:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2090. [2021-08-21 12:44:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 1.9889899473432264) internal successors, (4155), 2089 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 4155 transitions. [2021-08-21 12:44:41,998 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 4155 transitions. Word has length 36 [2021-08-21 12:44:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:41,999 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 4155 transitions. [2021-08-21 12:44:41,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 4155 transitions. [2021-08-21 12:44:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:42,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:42,000 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:42,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 12:44:42,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 12:44:42,223 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1879770856, now seen corresponding path program 97 times [2021-08-21 12:44:42,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:42,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215967920] [2021-08-21 12:44:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:42,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:42,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215967920] [2021-08-21 12:44:42,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215967920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820835900] [2021-08-21 12:44:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:42,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:42,622 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 12:44:42,623 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 12:44:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:48,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:49,350 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:49,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820835900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:49,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:49,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:44:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825426136] [2021-08-21 12:44:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:44:49,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:44:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:44:49,389 INFO L87 Difference]: Start difference. First operand 2090 states and 4155 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:49,930 INFO L93 Difference]: Finished difference Result 3047 states and 6118 transitions. [2021-08-21 12:44:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:44:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:49,933 INFO L225 Difference]: With dead ends: 3047 [2021-08-21 12:44:49,933 INFO L226 Difference]: Without dead ends: 2843 [2021-08-21 12:44:49,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:44:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2021-08-21 12:44:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2186. [2021-08-21 12:44:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.988558352402746) internal successors, (4345), 2185 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 4345 transitions. [2021-08-21 12:44:49,953 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 4345 transitions. Word has length 36 [2021-08-21 12:44:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 4345 transitions. [2021-08-21 12:44:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 4345 transitions. [2021-08-21 12:44:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:49,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:49,955 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:49,987 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 12:44:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:50,181 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 941224336, now seen corresponding path program 98 times [2021-08-21 12:44:50,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:50,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820614994] [2021-08-21 12:44:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:50,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:50,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:50,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820614994] [2021-08-21 12:44:50,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820614994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:50,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822973687] [2021-08-21 12:44:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:50,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:50,674 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 12:44:50,675 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 12:44:56,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:56,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:44:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:57,550 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:44:57,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:44:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:57,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822973687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:57,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:57,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:44:57,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134748564] [2021-08-21 12:44:57,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:44:57,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:44:57,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:44:57,590 INFO L87 Difference]: Start difference. First operand 2186 states and 4345 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:57,962 INFO L93 Difference]: Finished difference Result 3919 states and 7882 transitions. [2021-08-21 12:44:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:44:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:44:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:57,967 INFO L225 Difference]: With dead ends: 3919 [2021-08-21 12:44:57,967 INFO L226 Difference]: Without dead ends: 3859 [2021-08-21 12:44:57,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:44:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2021-08-21 12:44:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 2117. [2021-08-21 12:44:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.9891304347826086) internal successors, (4209), 2116 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 4209 transitions. [2021-08-21 12:44:57,990 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 4209 transitions. Word has length 36 [2021-08-21 12:44:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:57,990 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 4209 transitions. [2021-08-21 12:44:57,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 4209 transitions. [2021-08-21 12:44:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:44:57,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:57,992 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:58,027 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 12:44:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:44:58,195 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:44:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash 974041436, now seen corresponding path program 99 times [2021-08-21 12:44:58,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:58,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664322969] [2021-08-21 12:44:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:58,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:58,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:58,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664322969] [2021-08-21 12:44:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664322969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:58,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283223435] [2021-08-21 12:44:58,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:58,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:58,696 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 12:44:58,697 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 12:45:04,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:45:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:04,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:45:04,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:05,883 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-21 12:45:05,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 69 [2021-08-21 12:45:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283223435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:05,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:05,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:45:05,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107262525] [2021-08-21 12:45:05,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:45:05,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:45:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:05,922 INFO L87 Difference]: Start difference. First operand 2117 states and 4209 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:06,907 INFO L93 Difference]: Finished difference Result 3221 states and 6480 transitions. [2021-08-21 12:45:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:45:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:06,911 INFO L225 Difference]: With dead ends: 3221 [2021-08-21 12:45:06,911 INFO L226 Difference]: Without dead ends: 3077 [2021-08-21 12:45:06,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:45:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-08-21 12:45:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2183. [2021-08-21 12:45:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 1.9912923923006416) internal successors, (4345), 2182 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 4345 transitions. [2021-08-21 12:45:06,932 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 4345 transitions. Word has length 36 [2021-08-21 12:45:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:06,932 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 4345 transitions. [2021-08-21 12:45:06,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 4345 transitions. [2021-08-21 12:45:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:06,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:06,934 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:06,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:07,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:07,161 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash -577589804, now seen corresponding path program 100 times [2021-08-21 12:45:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:07,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733563692] [2021-08-21 12:45:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:07,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:07,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733563692] [2021-08-21 12:45:07,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733563692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:07,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976386753] [2021-08-21 12:45:07,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:07,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:07,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:07,625 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 12:45:07,625 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 12:45:13,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:13,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:45:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:14,728 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:14,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:14,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976386753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:14,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:14,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:45:14,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310920164] [2021-08-21 12:45:14,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:45:14,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:45:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:14,767 INFO L87 Difference]: Start difference. First operand 2183 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:15,146 INFO L93 Difference]: Finished difference Result 2863 states and 5744 transitions. [2021-08-21 12:45:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:45:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:15,149 INFO L225 Difference]: With dead ends: 2863 [2021-08-21 12:45:15,149 INFO L226 Difference]: Without dead ends: 2840 [2021-08-21 12:45:15,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:45:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-08-21 12:45:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2189. [2021-08-21 12:45:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.9913162705667276) internal successors, (4357), 2188 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 4357 transitions. [2021-08-21 12:45:15,169 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 4357 transitions. Word has length 36 [2021-08-21 12:45:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:15,169 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 4357 transitions. [2021-08-21 12:45:15,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 4357 transitions. [2021-08-21 12:45:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:15,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:15,171 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:15,204 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 12:45:15,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 12:45:15,373 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 425350334, now seen corresponding path program 101 times [2021-08-21 12:45:15,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:15,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25740582] [2021-08-21 12:45:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:15,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:15,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:15,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25740582] [2021-08-21 12:45:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25740582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:15,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538184356] [2021-08-21 12:45:15,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:15,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:15,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:15,924 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 12:45:15,924 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 12:45:21,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:45:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:21,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:45:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:22,962 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:22,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:23,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538184356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:23,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:23,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:45:23,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434371489] [2021-08-21 12:45:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:45:23,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:45:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:23,002 INFO L87 Difference]: Start difference. First operand 2189 states and 4357 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:23,438 INFO L93 Difference]: Finished difference Result 2874 states and 5767 transitions. [2021-08-21 12:45:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:45:23,439 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:23,442 INFO L225 Difference]: With dead ends: 2874 [2021-08-21 12:45:23,442 INFO L226 Difference]: Without dead ends: 2850 [2021-08-21 12:45:23,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:45:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-08-21 12:45:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2189. [2021-08-21 12:45:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.9913162705667276) internal successors, (4357), 2188 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 4357 transitions. [2021-08-21 12:45:23,465 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 4357 transitions. Word has length 36 [2021-08-21 12:45:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 4357 transitions. [2021-08-21 12:45:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 4357 transitions. [2021-08-21 12:45:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:23,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:23,467 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:23,504 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 12:45:23,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:23,693 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1220371616, now seen corresponding path program 102 times [2021-08-21 12:45:23,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:23,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893871380] [2021-08-21 12:45:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:23,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:24,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:24,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893871380] [2021-08-21 12:45:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893871380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:24,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656677384] [2021-08-21 12:45:24,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:24,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:24,154 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 12:45:24,155 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 12:45:30,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:45:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:30,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:45:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:31,538 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:31,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656677384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:31,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:45:31,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843393119] [2021-08-21 12:45:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:45:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:45:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:45:31,575 INFO L87 Difference]: Start difference. First operand 2189 states and 4357 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:31,982 INFO L93 Difference]: Finished difference Result 3100 states and 6231 transitions. [2021-08-21 12:45:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:45:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:31,985 INFO L225 Difference]: With dead ends: 3100 [2021-08-21 12:45:31,985 INFO L226 Difference]: Without dead ends: 2920 [2021-08-21 12:45:31,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:45:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-08-21 12:45:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2276. [2021-08-21 12:45:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.9898901098901098) internal successors, (4527), 2275 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 4527 transitions. [2021-08-21 12:45:32,006 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 4527 transitions. Word has length 36 [2021-08-21 12:45:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:32,006 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 4527 transitions. [2021-08-21 12:45:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 4527 transitions. [2021-08-21 12:45:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:32,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:32,008 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:32,044 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 12:45:32,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:32,221 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1600623576, now seen corresponding path program 103 times [2021-08-21 12:45:32,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:32,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674543558] [2021-08-21 12:45:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:32,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:32,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:32,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674543558] [2021-08-21 12:45:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674543558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:32,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524853693] [2021-08-21 12:45:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:32,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:32,730 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 12:45:32,731 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 12:45:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:38,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:45:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:40,004 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:40,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:40,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524853693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:40,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:40,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:45:40,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286314232] [2021-08-21 12:45:40,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:45:40,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:45:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:45:40,044 INFO L87 Difference]: Start difference. First operand 2276 states and 4527 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:40,364 INFO L93 Difference]: Finished difference Result 3528 states and 7124 transitions. [2021-08-21 12:45:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:45:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:40,368 INFO L225 Difference]: With dead ends: 3528 [2021-08-21 12:45:40,368 INFO L226 Difference]: Without dead ends: 3475 [2021-08-21 12:45:40,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-08-21 12:45:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2264. [2021-08-21 12:45:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.9898365002209457) internal successors, (4503), 2263 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 4503 transitions. [2021-08-21 12:45:40,390 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 4503 transitions. Word has length 36 [2021-08-21 12:45:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:40,390 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 4503 transitions. [2021-08-21 12:45:40,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 4503 transitions. [2021-08-21 12:45:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:40,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:40,392 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:40,429 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 12:45:40,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-21 12:45:40,613 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1239728190, now seen corresponding path program 104 times [2021-08-21 12:45:40,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:40,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781780367] [2021-08-21 12:45:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:40,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:41,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:41,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781780367] [2021-08-21 12:45:41,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781780367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:41,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385309603] [2021-08-21 12:45:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:41,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:41,023 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 12:45:41,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:45:47,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:47,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:47,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:45:47,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:48,225 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:48,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385309603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:48,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:48,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:45:48,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815610666] [2021-08-21 12:45:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:45:48,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:45:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:45:48,262 INFO L87 Difference]: Start difference. First operand 2264 states and 4503 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:48,709 INFO L93 Difference]: Finished difference Result 3419 states and 6873 transitions. [2021-08-21 12:45:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:45:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:48,713 INFO L225 Difference]: With dead ends: 3419 [2021-08-21 12:45:48,713 INFO L226 Difference]: Without dead ends: 3358 [2021-08-21 12:45:48,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-08-21 12:45:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2279. [2021-08-21 12:45:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.9894644424934154) internal successors, (4532), 2278 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 4532 transitions. [2021-08-21 12:45:48,735 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 4532 transitions. Word has length 36 [2021-08-21 12:45:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 4532 transitions. [2021-08-21 12:45:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 4532 transitions. [2021-08-21 12:45:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:48,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:48,737 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:48,772 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 12:45:48,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:48,948 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1633440676, now seen corresponding path program 105 times [2021-08-21 12:45:48,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:48,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765145189] [2021-08-21 12:45:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:48,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:49,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765145189] [2021-08-21 12:45:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765145189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114324204] [2021-08-21 12:45:49,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:49,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:49,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:49,413 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:49,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:45:55,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:45:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:55,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:45:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:56,466 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:45:56,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:45:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:56,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114324204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:56,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:56,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:45:56,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000639752] [2021-08-21 12:45:56,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:45:56,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:45:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:45:56,510 INFO L87 Difference]: Start difference. First operand 2279 states and 4532 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:56,784 INFO L93 Difference]: Finished difference Result 3323 states and 6696 transitions. [2021-08-21 12:45:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:45:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:56,787 INFO L225 Difference]: With dead ends: 3323 [2021-08-21 12:45:56,787 INFO L226 Difference]: Without dead ends: 3266 [2021-08-21 12:45:56,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:45:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-08-21 12:45:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 2267. [2021-08-21 12:45:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 1.9894086496028243) internal successors, (4508), 2266 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4508 transitions. [2021-08-21 12:45:56,809 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4508 transitions. Word has length 36 [2021-08-21 12:45:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:56,810 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 4508 transitions. [2021-08-21 12:45:56,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4508 transitions. [2021-08-21 12:45:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:56,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:56,812 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:56,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:57,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:57,025 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash 81809436, now seen corresponding path program 106 times [2021-08-21 12:45:57,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:57,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967337969] [2021-08-21 12:45:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:57,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:57,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:57,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967337969] [2021-08-21 12:45:57,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967337969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:57,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075567262] [2021-08-21 12:45:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:57,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:57,443 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:57,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:46:03,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:03,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:03,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:04,760 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:46:04,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:46:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075567262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:04,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:04,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:04,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875585818] [2021-08-21 12:46:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:04,799 INFO L87 Difference]: Start difference. First operand 2267 states and 4508 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:05,160 INFO L93 Difference]: Finished difference Result 2963 states and 5940 transitions. [2021-08-21 12:46:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:46:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:05,164 INFO L225 Difference]: With dead ends: 2963 [2021-08-21 12:46:05,164 INFO L226 Difference]: Without dead ends: 2940 [2021-08-21 12:46:05,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:46:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-08-21 12:46:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2276. [2021-08-21 12:46:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.9894505494505494) internal successors, (4526), 2275 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 4526 transitions. [2021-08-21 12:46:05,185 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 4526 transitions. Word has length 36 [2021-08-21 12:46:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:05,185 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 4526 transitions. [2021-08-21 12:46:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 4526 transitions. [2021-08-21 12:46:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:05,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:05,187 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:05,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:05,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:05,409 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1084749574, now seen corresponding path program 107 times [2021-08-21 12:46:05,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:05,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123781631] [2021-08-21 12:46:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:05,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:05,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:05,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123781631] [2021-08-21 12:46:05,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123781631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:05,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042915689] [2021-08-21 12:46:05,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:05,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:05,837 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:46:11,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:46:11,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:11,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:13,196 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:46:13,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:46:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:13,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042915689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:13,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:13,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:13,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895857308] [2021-08-21 12:46:13,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:13,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:13,235 INFO L87 Difference]: Start difference. First operand 2276 states and 4526 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:13,658 INFO L93 Difference]: Finished difference Result 2974 states and 5963 transitions. [2021-08-21 12:46:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:46:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:13,662 INFO L225 Difference]: With dead ends: 2974 [2021-08-21 12:46:13,662 INFO L226 Difference]: Without dead ends: 2950 [2021-08-21 12:46:13,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:46:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-08-21 12:46:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2276. [2021-08-21 12:46:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.9894505494505494) internal successors, (4526), 2275 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 4526 transitions. [2021-08-21 12:46:13,682 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 4526 transitions. Word has length 36 [2021-08-21 12:46:13,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:13,682 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 4526 transitions. [2021-08-21 12:46:13,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 4526 transitions. [2021-08-21 12:46:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:13,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:13,684 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:13,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:13,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:46:13,909 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 320779646, now seen corresponding path program 108 times [2021-08-21 12:46:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:13,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493445445] [2021-08-21 12:46:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:13,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:14,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493445445] [2021-08-21 12:46:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493445445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027184586] [2021-08-21 12:46:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:14,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:14,334 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:14,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:46:20,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:46:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:20,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:22,124 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:46:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 12:46:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027184586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:22,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:22,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094135510] [2021-08-21 12:46:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:22,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:22,163 INFO L87 Difference]: Start difference. First operand 2276 states and 4526 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:22,710 INFO L93 Difference]: Finished difference Result 2906 states and 5823 transitions. [2021-08-21 12:46:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:46:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:22,714 INFO L225 Difference]: With dead ends: 2906 [2021-08-21 12:46:22,714 INFO L226 Difference]: Without dead ends: 2881 [2021-08-21 12:46:22,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:46:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-08-21 12:46:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2286. [2021-08-21 12:46:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9899343544857768) internal successors, (4547), 2285 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4547 transitions. [2021-08-21 12:46:22,734 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4547 transitions. Word has length 36 [2021-08-21 12:46:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:22,734 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 4547 transitions. [2021-08-21 12:46:22,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4547 transitions. [2021-08-21 12:46:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:22,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:22,736 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:22,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:46:22,949 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash -259157830, now seen corresponding path program 109 times [2021-08-21 12:46:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842796694] [2021-08-21 12:46:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:22,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:46:23,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:23,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842796694] [2021-08-21 12:46:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842796694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:23,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801071710] [2021-08-21 12:46:23,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:23,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:23,291 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:23,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:46:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:29,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:30,927 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:46:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:46:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:30,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801071710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:30,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:30,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:46:30,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062569905] [2021-08-21 12:46:30,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:46:30,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:46:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:46:30,991 INFO L87 Difference]: Start difference. First operand 2286 states and 4547 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:31,646 INFO L93 Difference]: Finished difference Result 4650 states and 9361 transitions. [2021-08-21 12:46:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:46:31,646 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:31,652 INFO L225 Difference]: With dead ends: 4650 [2021-08-21 12:46:31,652 INFO L226 Difference]: Without dead ends: 4607 [2021-08-21 12:46:31,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:46:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2021-08-21 12:46:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 2325. [2021-08-21 12:46:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 1.9862306368330465) internal successors, (4616), 2324 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 4616 transitions. [2021-08-21 12:46:31,682 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 4616 transitions. Word has length 36 [2021-08-21 12:46:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:31,682 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 4616 transitions. [2021-08-21 12:46:31,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 4616 transitions. [2021-08-21 12:46:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:31,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:31,684 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:31,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:46:31,899 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:31,899 INFO L82 PathProgramCache]: Analyzing trace with hash 336614194, now seen corresponding path program 110 times [2021-08-21 12:46:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:31,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570452351] [2021-08-21 12:46:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:31,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:32,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:32,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570452351] [2021-08-21 12:46:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570452351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:32,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348314124] [2021-08-21 12:46:32,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:32,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:32,220 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:32,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:46:38,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:38,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:39,849 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:46:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:46:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348314124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:39,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:39,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475339507] [2021-08-21 12:46:39,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:39,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:39,916 INFO L87 Difference]: Start difference. First operand 2325 states and 4616 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:40,541 INFO L93 Difference]: Finished difference Result 4456 states and 8989 transitions. [2021-08-21 12:46:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:46:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:40,546 INFO L225 Difference]: With dead ends: 4456 [2021-08-21 12:46:40,546 INFO L226 Difference]: Without dead ends: 4408 [2021-08-21 12:46:40,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:46:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-08-21 12:46:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 2370. [2021-08-21 12:46:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2369 states have (on average 1.986492190797805) internal successors, (4706), 2369 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 4706 transitions. [2021-08-21 12:46:40,571 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 4706 transitions. Word has length 36 [2021-08-21 12:46:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 4706 transitions. [2021-08-21 12:46:40,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 4706 transitions. [2021-08-21 12:46:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:40,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:40,602 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:40,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 12:46:40,803 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:40,803 INFO L82 PathProgramCache]: Analyzing trace with hash 225568634, now seen corresponding path program 111 times [2021-08-21 12:46:40,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:40,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920759027] [2021-08-21 12:46:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:40,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:41,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:41,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920759027] [2021-08-21 12:46:41,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920759027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:41,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661635199] [2021-08-21 12:46:41,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:41,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:41,203 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:41,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:46:47,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:46:47,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:47,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:48,813 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:46:48,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:46:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:48,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661635199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:48,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:48,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:48,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284565143] [2021-08-21 12:46:48,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:48,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:48,855 INFO L87 Difference]: Start difference. First operand 2370 states and 4706 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:49,396 INFO L93 Difference]: Finished difference Result 4441 states and 8976 transitions. [2021-08-21 12:46:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:46:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:49,401 INFO L225 Difference]: With dead ends: 4441 [2021-08-21 12:46:49,401 INFO L226 Difference]: Without dead ends: 4389 [2021-08-21 12:46:49,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:46:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-08-21 12:46:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 2439. [2021-08-21 12:46:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2438 states have (on average 1.9868744872846595) internal successors, (4844), 2438 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 4844 transitions. [2021-08-21 12:46:49,428 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 4844 transitions. Word has length 36 [2021-08-21 12:46:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:49,428 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 4844 transitions. [2021-08-21 12:46:49,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 4844 transitions. [2021-08-21 12:46:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:49,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:49,430 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:49,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:46:49,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:49,644 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1326062606, now seen corresponding path program 112 times [2021-08-21 12:46:49,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:49,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499047303] [2021-08-21 12:46:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:49,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:49,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:49,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499047303] [2021-08-21 12:46:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499047303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:49,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047075837] [2021-08-21 12:46:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:49,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:49,923 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:49,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:46:56,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:56,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:46:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:57,701 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:46:57,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:46:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047075837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:57,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:57,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:46:57,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161857298] [2021-08-21 12:46:57,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:46:57,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:46:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:57,749 INFO L87 Difference]: Start difference. First operand 2439 states and 4844 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,315 INFO L93 Difference]: Finished difference Result 4323 states and 8728 transitions. [2021-08-21 12:46:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:46:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:46:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,320 INFO L225 Difference]: With dead ends: 4323 [2021-08-21 12:46:58,320 INFO L226 Difference]: Without dead ends: 4261 [2021-08-21 12:46:58,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 682.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:46:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-08-21 12:46:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2423. [2021-08-21 12:46:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 1.9876135425268373) internal successors, (4814), 2422 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 4814 transitions. [2021-08-21 12:46:58,346 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 4814 transitions. Word has length 36 [2021-08-21 12:46:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,346 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 4814 transitions. [2021-08-21 12:46:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 4814 transitions. [2021-08-21 12:46:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:46:58,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,348 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:58,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:58,566 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1616589660, now seen corresponding path program 113 times [2021-08-21 12:46:58,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185890551] [2021-08-21 12:46:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185890551] [2021-08-21 12:46:58,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185890551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:58,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057978418] [2021-08-21 12:46:58,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:58,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:58,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:58,959 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:58,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:47:05,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:47:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:05,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:47:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:06,929 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 12:47:06,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 12:47:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057978418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:06,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:06,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 12:47:06,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352125923] [2021-08-21 12:47:06,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:47:06,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:47:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:47:06,980 INFO L87 Difference]: Start difference. First operand 2423 states and 4814 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:08,489 INFO L93 Difference]: Finished difference Result 3977 states and 7948 transitions. [2021-08-21 12:47:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:47:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:08,493 INFO L225 Difference]: With dead ends: 3977 [2021-08-21 12:47:08,493 INFO L226 Difference]: Without dead ends: 3780 [2021-08-21 12:47:08,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1408.3ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:47:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-08-21 12:47:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 2483. [2021-08-21 12:47:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 1.9891216760676873) internal successors, (4937), 2482 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 4937 transitions. [2021-08-21 12:47:08,517 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 4937 transitions. Word has length 36 [2021-08-21 12:47:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:08,517 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 4937 transitions. [2021-08-21 12:47:08,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 4937 transitions. [2021-08-21 12:47:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:08,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:08,519 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:08,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:08,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-21 12:47:08,741 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash 707010674, now seen corresponding path program 114 times [2021-08-21 12:47:08,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:08,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922735691] [2021-08-21 12:47:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:08,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:09,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:09,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922735691] [2021-08-21 12:47:09,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922735691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:09,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478388903] [2021-08-21 12:47:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:09,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:09,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:09,177 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:09,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:47:16,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:47:16,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:16,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:47:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:17,606 INFO L354 Elim1Store]: treesize reduction 285, result has 3.4 percent of original size [2021-08-21 12:47:17,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 66 [2021-08-21 12:47:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:17,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478388903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:17,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:17,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:47:17,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978053259] [2021-08-21 12:47:17,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:17,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:17,646 INFO L87 Difference]: Start difference. First operand 2483 states and 4937 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:18,684 INFO L93 Difference]: Finished difference Result 3962 states and 7946 transitions. [2021-08-21 12:47:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:47:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:18,688 INFO L225 Difference]: With dead ends: 3962 [2021-08-21 12:47:18,688 INFO L226 Difference]: Without dead ends: 3804 [2021-08-21 12:47:18,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 979.8ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:47:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2021-08-21 12:47:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 2522. [2021-08-21 12:47:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.9900833002776677) internal successors, (5017), 2521 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 5017 transitions. [2021-08-21 12:47:18,712 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 5017 transitions. Word has length 36 [2021-08-21 12:47:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 5017 transitions. [2021-08-21 12:47:18,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 5017 transitions. [2021-08-21 12:47:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:18,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:18,714 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:18,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:18,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,941 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1709950812, now seen corresponding path program 115 times [2021-08-21 12:47:18,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:18,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654873312] [2021-08-21 12:47:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:18,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654873312] [2021-08-21 12:47:19,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654873312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772658028] [2021-08-21 12:47:19,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:19,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:19,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:19,451 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:19,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:47:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:26,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:47:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:27,538 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:47:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:47:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:27,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772658028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:27,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:27,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:47:27,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115981096] [2021-08-21 12:47:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:27,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:27,579 INFO L87 Difference]: Start difference. First operand 2522 states and 5017 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:28,051 INFO L93 Difference]: Finished difference Result 3670 states and 7339 transitions. [2021-08-21 12:47:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:47:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:28,055 INFO L225 Difference]: With dead ends: 3670 [2021-08-21 12:47:28,055 INFO L226 Difference]: Without dead ends: 3646 [2021-08-21 12:47:28,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 745.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-08-21 12:47:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2522. [2021-08-21 12:47:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.9900833002776677) internal successors, (5017), 2521 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 5017 transitions. [2021-08-21 12:47:28,077 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 5017 transitions. Word has length 36 [2021-08-21 12:47:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:28,077 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 5017 transitions. [2021-08-21 12:47:28,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 5017 transitions. [2021-08-21 12:47:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:28,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:28,079 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:28,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:28,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:28,293 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1372112940, now seen corresponding path program 116 times [2021-08-21 12:47:28,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:28,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655939319] [2021-08-21 12:47:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:28,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:28,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:28,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655939319] [2021-08-21 12:47:28,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655939319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:28,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566978092] [2021-08-21 12:47:28,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:28,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:28,683 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:28,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:47:35,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:35,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:47:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:36,363 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:47:36,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:47:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:36,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566978092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:36,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:36,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:47:36,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981401322] [2021-08-21 12:47:36,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:36,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:36,388 INFO L87 Difference]: Start difference. First operand 2522 states and 5017 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:36,724 INFO L93 Difference]: Finished difference Result 3644 states and 7349 transitions. [2021-08-21 12:47:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:47:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:36,729 INFO L225 Difference]: With dead ends: 3644 [2021-08-21 12:47:36,729 INFO L226 Difference]: Without dead ends: 3579 [2021-08-21 12:47:36,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-08-21 12:47:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 2519. [2021-08-21 12:47:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 1.9900714853057984) internal successors, (5011), 2518 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 5011 transitions. [2021-08-21 12:47:36,752 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 5011 transitions. Word has length 36 [2021-08-21 12:47:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:36,753 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 5011 transitions. [2021-08-21 12:47:36,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 5011 transitions. [2021-08-21 12:47:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:36,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:36,754 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:36,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 12:47:36,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-21 12:47:36,979 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2013275370, now seen corresponding path program 117 times [2021-08-21 12:47:36,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:36,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098820033] [2021-08-21 12:47:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:36,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:37,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:37,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098820033] [2021-08-21 12:47:37,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098820033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:37,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524772611] [2021-08-21 12:47:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:37,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:37,422 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:37,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:47:44,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:47:44,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:44,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:47:44,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:45,603 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:47:45,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:47:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524772611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:45,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:47:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618360755] [2021-08-21 12:47:45,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:45,643 INFO L87 Difference]: Start difference. First operand 2519 states and 5011 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:46,193 INFO L93 Difference]: Finished difference Result 3806 states and 7664 transitions. [2021-08-21 12:47:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:47:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:46,198 INFO L225 Difference]: With dead ends: 3806 [2021-08-21 12:47:46,198 INFO L226 Difference]: Without dead ends: 3635 [2021-08-21 12:47:46,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-08-21 12:47:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2573. [2021-08-21 12:47:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 1.9930015552099534) internal successors, (5126), 2572 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 5126 transitions. [2021-08-21 12:47:46,232 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 5126 transitions. Word has length 36 [2021-08-21 12:47:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:46,232 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 5126 transitions. [2021-08-21 12:47:46,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 5126 transitions. [2021-08-21 12:47:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:46,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:46,234 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:46,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:46,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:47:46,449 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1278751788, now seen corresponding path program 118 times [2021-08-21 12:47:46,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:46,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932054848] [2021-08-21 12:47:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:46,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:46,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:46,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932054848] [2021-08-21 12:47:46,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932054848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:46,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041447691] [2021-08-21 12:47:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:46,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:46,862 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:46,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:47:54,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:54,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:54,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:47:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:54,991 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:47:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:47:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:55,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041447691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:55,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:55,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:47:55,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036331557] [2021-08-21 12:47:55,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:55,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:55,017 INFO L87 Difference]: Start difference. First operand 2573 states and 5126 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:55,590 INFO L93 Difference]: Finished difference Result 3497 states and 7016 transitions. [2021-08-21 12:47:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:47:55,591 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:47:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:55,595 INFO L225 Difference]: With dead ends: 3497 [2021-08-21 12:47:55,595 INFO L226 Difference]: Without dead ends: 3473 [2021-08-21 12:47:55,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2021-08-21 12:47:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 2573. [2021-08-21 12:47:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 1.9930015552099534) internal successors, (5126), 2572 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 5126 transitions. [2021-08-21 12:47:55,625 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 5126 transitions. Word has length 36 [2021-08-21 12:47:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:55,625 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 5126 transitions. [2021-08-21 12:47:55,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 5126 transitions. [2021-08-21 12:47:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:47:55,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:55,627 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:55,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:47:55,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:47:55,841 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1622292686, now seen corresponding path program 119 times [2021-08-21 12:47:55,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:55,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905564832] [2021-08-21 12:47:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:55,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:56,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:56,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905564832] [2021-08-21 12:47:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905564832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:56,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890903192] [2021-08-21 12:47:56,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:56,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:56,305 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:56,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:48:03,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:48:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:03,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:48:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:04,893 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 12:48:04,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 12:48:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890903192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:04,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:04,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 12:48:04,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018118259] [2021-08-21 12:48:04,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:48:04,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:48:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:48:04,944 INFO L87 Difference]: Start difference. First operand 2573 states and 5126 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:06,854 INFO L93 Difference]: Finished difference Result 3847 states and 7727 transitions. [2021-08-21 12:48:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:48:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:06,859 INFO L225 Difference]: With dead ends: 3847 [2021-08-21 12:48:06,859 INFO L226 Difference]: Without dead ends: 3704 [2021-08-21 12:48:06,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1863.5ms TimeCoverageRelationStatistics Valid=238, Invalid=2954, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:48:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-08-21 12:48:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2606. [2021-08-21 12:48:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.9950095969289827) internal successors, (5197), 2605 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5197 transitions. [2021-08-21 12:48:06,883 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5197 transitions. Word has length 36 [2021-08-21 12:48:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:06,883 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 5197 transitions. [2021-08-21 12:48:06,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5197 transitions. [2021-08-21 12:48:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:06,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:06,885 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:06,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:07,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:48:07,089 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -619352548, now seen corresponding path program 120 times [2021-08-21 12:48:07,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:07,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164834513] [2021-08-21 12:48:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:07,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:07,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:07,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164834513] [2021-08-21 12:48:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164834513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:07,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656358200] [2021-08-21 12:48:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:07,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:07,534 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:07,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:48:14,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:48:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:14,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:48:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:15,795 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:48:15,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:48:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656358200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:15,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:15,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:48:15,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599791542] [2021-08-21 12:48:15,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:48:15,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:48:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:15,835 INFO L87 Difference]: Start difference. First operand 2606 states and 5197 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:16,266 INFO L93 Difference]: Finished difference Result 3551 states and 7129 transitions. [2021-08-21 12:48:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:48:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:16,270 INFO L225 Difference]: With dead ends: 3551 [2021-08-21 12:48:16,270 INFO L226 Difference]: Without dead ends: 3527 [2021-08-21 12:48:16,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-08-21 12:48:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2603. [2021-08-21 12:48:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 1.9950038431975403) internal successors, (5191), 2602 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 5191 transitions. [2021-08-21 12:48:16,295 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 5191 transitions. Word has length 36 [2021-08-21 12:48:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:16,295 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 5191 transitions. [2021-08-21 12:48:16,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 5191 transitions. [2021-08-21 12:48:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:16,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:16,297 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:16,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:16,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:16,517 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1383322476, now seen corresponding path program 121 times [2021-08-21 12:48:16,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:16,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931722812] [2021-08-21 12:48:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:16,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:16,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:16,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931722812] [2021-08-21 12:48:16,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931722812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:16,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919192138] [2021-08-21 12:48:16,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:16,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:16,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:16,945 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:16,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:48:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:24,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:48:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:25,301 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:48:25,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:48:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:25,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919192138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:25,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:25,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:48:25,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637287761] [2021-08-21 12:48:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:48:25,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:48:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:25,333 INFO L87 Difference]: Start difference. First operand 2603 states and 5191 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:25,929 INFO L93 Difference]: Finished difference Result 3559 states and 7146 transitions. [2021-08-21 12:48:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:48:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:25,934 INFO L225 Difference]: With dead ends: 3559 [2021-08-21 12:48:25,934 INFO L226 Difference]: Without dead ends: 3534 [2021-08-21 12:48:25,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-08-21 12:48:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 2600. [2021-08-21 12:48:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 1.9949980761831474) internal successors, (5185), 2599 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 5185 transitions. [2021-08-21 12:48:25,964 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 5185 transitions. Word has length 36 [2021-08-21 12:48:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:25,964 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 5185 transitions. [2021-08-21 12:48:25,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 5185 transitions. [2021-08-21 12:48:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:25,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:25,968 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:26,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 12:48:26,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:26,183 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:26,184 INFO L82 PathProgramCache]: Analyzing trace with hash -292566308, now seen corresponding path program 122 times [2021-08-21 12:48:26,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:26,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504819020] [2021-08-21 12:48:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:26,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:48:26,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:26,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504819020] [2021-08-21 12:48:26,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504819020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:26,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717530996] [2021-08-21 12:48:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:26,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:26,568 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:26,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:48:34,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:34,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:48:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:34,996 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:48:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:48:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:35,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717530996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:35,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:35,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 12:48:35,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930007140] [2021-08-21 12:48:35,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:35,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:35,035 INFO L87 Difference]: Start difference. First operand 2600 states and 5185 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:35,580 INFO L93 Difference]: Finished difference Result 3479 states and 6968 transitions. [2021-08-21 12:48:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:48:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:35,584 INFO L225 Difference]: With dead ends: 3479 [2021-08-21 12:48:35,584 INFO L226 Difference]: Without dead ends: 3320 [2021-08-21 12:48:35,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-08-21 12:48:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2672. [2021-08-21 12:48:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 1.9932609509546986) internal successors, (5324), 2671 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 5324 transitions. [2021-08-21 12:48:35,608 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 5324 transitions. Word has length 36 [2021-08-21 12:48:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:35,608 INFO L470 AbstractCegarLoop]: Abstraction has 2672 states and 5324 transitions. [2021-08-21 12:48:35,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 5324 transitions. [2021-08-21 12:48:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:35,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:35,610 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:35,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 12:48:35,833 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1302736604, now seen corresponding path program 123 times [2021-08-21 12:48:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:35,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337962418] [2021-08-21 12:48:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:35,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:48:36,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:36,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337962418] [2021-08-21 12:48:36,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337962418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:36,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087615922] [2021-08-21 12:48:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:36,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:36,195 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:36,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:48:43,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:48:43,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:43,869 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:48:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:44,850 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:48:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:48:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087615922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:44,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:44,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 12:48:44,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030759889] [2021-08-21 12:48:44,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:44,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:44,890 INFO L87 Difference]: Start difference. First operand 2672 states and 5324 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:45,499 INFO L93 Difference]: Finished difference Result 3674 states and 7356 transitions. [2021-08-21 12:48:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:48:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:45,503 INFO L225 Difference]: With dead ends: 3674 [2021-08-21 12:48:45,503 INFO L226 Difference]: Without dead ends: 3448 [2021-08-21 12:48:45,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2021-08-21 12:48:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2783. [2021-08-21 12:48:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 1.9910136592379584) internal successors, (5539), 2782 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 5539 transitions. [2021-08-21 12:48:45,528 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 5539 transitions. Word has length 36 [2021-08-21 12:48:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:45,528 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 5539 transitions. [2021-08-21 12:48:45,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 5539 transitions. [2021-08-21 12:48:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:45,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:45,530 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:45,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 12:48:45,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:48:45,751 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -873947134, now seen corresponding path program 124 times [2021-08-21 12:48:45,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:45,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952683991] [2021-08-21 12:48:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:45,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:48:46,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:46,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952683991] [2021-08-21 12:48:46,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952683991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:46,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824558608] [2021-08-21 12:48:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:46,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:46,113 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:46,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:48:53,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:53,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:48:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:54,719 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:48:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 12:48:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824558608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:54,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:54,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-08-21 12:48:54,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407134486] [2021-08-21 12:48:54,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:48:54,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:48:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:48:54,752 INFO L87 Difference]: Start difference. First operand 2783 states and 5539 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:55,154 INFO L93 Difference]: Finished difference Result 4606 states and 9208 transitions. [2021-08-21 12:48:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:48:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:48:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:55,159 INFO L225 Difference]: With dead ends: 4606 [2021-08-21 12:48:55,159 INFO L226 Difference]: Without dead ends: 4363 [2021-08-21 12:48:55,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:48:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-21 12:48:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3203. [2021-08-21 12:48:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 1.9828232354778264) internal successors, (6349), 3202 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 6349 transitions. [2021-08-21 12:48:55,191 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 6349 transitions. Word has length 36 [2021-08-21 12:48:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:55,191 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 6349 transitions. [2021-08-21 12:48:55,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 6349 transitions. [2021-08-21 12:48:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:48:55,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:55,193 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:55,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 12:48:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 12:48:55,396 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash 428233918, now seen corresponding path program 125 times [2021-08-21 12:48:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:55,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241725643] [2021-08-21 12:48:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:55,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:55,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:55,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241725643] [2021-08-21 12:48:55,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241725643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:55,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121429031] [2021-08-21 12:48:55,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:55,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:55,905 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:55,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:49:03,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:49:03,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:03,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:49:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:04,594 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121429031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:04,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:04,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:49:04,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897487891] [2021-08-21 12:49:04,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:49:04,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:49:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:49:04,635 INFO L87 Difference]: Start difference. First operand 3203 states and 6349 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:05,042 INFO L93 Difference]: Finished difference Result 4004 states and 8014 transitions. [2021-08-21 12:49:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:49:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:05,046 INFO L225 Difference]: With dead ends: 4004 [2021-08-21 12:49:05,046 INFO L226 Difference]: Without dead ends: 3892 [2021-08-21 12:49:05,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-08-21 12:49:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3224. [2021-08-21 12:49:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 1.9829351535836177) internal successors, (6391), 3223 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 6391 transitions. [2021-08-21 12:49:05,075 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 6391 transitions. Word has length 36 [2021-08-21 12:49:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:05,075 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 6391 transitions. [2021-08-21 12:49:05,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 6391 transitions. [2021-08-21 12:49:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:05,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:05,077 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:05,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 12:49:05,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:05,297 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:05,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1783526120, now seen corresponding path program 126 times [2021-08-21 12:49:05,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:05,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388816108] [2021-08-21 12:49:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:05,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:49:05,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:05,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388816108] [2021-08-21 12:49:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388816108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:05,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672958113] [2021-08-21 12:49:05,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:05,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:05,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:05,716 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:05,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:49:13,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:49:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:13,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:49:13,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:14,488 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:14,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672958113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:14,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:14,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 12:49:14,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554732254] [2021-08-21 12:49:14,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:49:14,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:49:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:49:14,526 INFO L87 Difference]: Start difference. First operand 3224 states and 6391 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:15,095 INFO L93 Difference]: Finished difference Result 4133 states and 8244 transitions. [2021-08-21 12:49:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:49:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:15,100 INFO L225 Difference]: With dead ends: 4133 [2021-08-21 12:49:15,100 INFO L226 Difference]: Without dead ends: 3911 [2021-08-21 12:49:15,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:49:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-08-21 12:49:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3326. [2021-08-21 12:49:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.9834586466165414) internal successors, (6595), 3325 states have internal predecessors, (6595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6595 transitions. [2021-08-21 12:49:15,131 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6595 transitions. Word has length 36 [2021-08-21 12:49:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:15,132 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 6595 transitions. [2021-08-21 12:49:15,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6595 transitions. [2021-08-21 12:49:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:15,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:15,134 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:15,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:15,353 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1037469072, now seen corresponding path program 127 times [2021-08-21 12:49:15,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:15,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776033499] [2021-08-21 12:49:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:15,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:15,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:15,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776033499] [2021-08-21 12:49:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776033499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:15,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015308466] [2021-08-21 12:49:15,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:15,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:15,790 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:15,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:49:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:23,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:49:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:24,628 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:24,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:24,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015308466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:24,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:24,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-08-21 12:49:24,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104989940] [2021-08-21 12:49:24,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:49:24,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:24,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:49:24,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:49:24,667 INFO L87 Difference]: Start difference. First operand 3326 states and 6595 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:25,145 INFO L93 Difference]: Finished difference Result 5359 states and 10730 transitions. [2021-08-21 12:49:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:49:25,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:25,151 INFO L225 Difference]: With dead ends: 5359 [2021-08-21 12:49:25,151 INFO L226 Difference]: Without dead ends: 5296 [2021-08-21 12:49:25,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-08-21 12:49:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 3239. [2021-08-21 12:49:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3238 states have (on average 1.9830142063001852) internal successors, (6421), 3238 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 6421 transitions. [2021-08-21 12:49:25,190 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 6421 transitions. Word has length 36 [2021-08-21 12:49:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:25,191 INFO L470 AbstractCegarLoop]: Abstraction has 3239 states and 6421 transitions. [2021-08-21 12:49:25,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 6421 transitions. [2021-08-21 12:49:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:25,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:25,193 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:25,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:25,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-21 12:49:25,401 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -481345068, now seen corresponding path program 128 times [2021-08-21 12:49:25,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:25,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681082620] [2021-08-21 12:49:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:25,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:25,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681082620] [2021-08-21 12:49:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681082620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948818148] [2021-08-21 12:49:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:25,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:25,917 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:25,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:49:33,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:33,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:49:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:34,809 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:34,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948818148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:34,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:34,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:49:34,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200932453] [2021-08-21 12:49:34,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:49:34,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:49:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:49:34,841 INFO L87 Difference]: Start difference. First operand 3239 states and 6421 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:35,214 INFO L93 Difference]: Finished difference Result 4304 states and 8634 transitions. [2021-08-21 12:49:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:49:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:35,219 INFO L225 Difference]: With dead ends: 4304 [2021-08-21 12:49:35,219 INFO L226 Difference]: Without dead ends: 4245 [2021-08-21 12:49:35,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-08-21 12:49:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3266. [2021-08-21 12:49:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 1.9831546707503829) internal successors, (6475), 3265 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 6475 transitions. [2021-08-21 12:49:35,250 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 6475 transitions. Word has length 36 [2021-08-21 12:49:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:35,250 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 6475 transitions. [2021-08-21 12:49:35,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 6475 transitions. [2021-08-21 12:49:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:35,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:35,252 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:35,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:35,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 12:49:35,477 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash 521595070, now seen corresponding path program 129 times [2021-08-21 12:49:35,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:35,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175585636] [2021-08-21 12:49:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:35,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:35,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175585636] [2021-08-21 12:49:35,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175585636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310721034] [2021-08-21 12:49:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:35,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:35,855 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:35,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:49:43,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:49:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:43,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:49:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:44,874 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:44,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310721034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:44,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:44,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:49:44,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873621798] [2021-08-21 12:49:44,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:49:44,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:44,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:49:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:49:44,915 INFO L87 Difference]: Start difference. First operand 3266 states and 6475 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:45,379 INFO L93 Difference]: Finished difference Result 3905 states and 7790 transitions. [2021-08-21 12:49:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:49:45,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:45,383 INFO L225 Difference]: With dead ends: 3905 [2021-08-21 12:49:45,383 INFO L226 Difference]: Without dead ends: 3881 [2021-08-21 12:49:45,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3881 states. [2021-08-21 12:49:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3881 to 3266. [2021-08-21 12:49:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 1.9831546707503829) internal successors, (6475), 3265 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 6475 transitions. [2021-08-21 12:49:45,416 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 6475 transitions. Word has length 36 [2021-08-21 12:49:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:45,417 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 6475 transitions. [2021-08-21 12:49:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 6475 transitions. [2021-08-21 12:49:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:45,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:45,419 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:45,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:45,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:49:45,645 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1124126880, now seen corresponding path program 130 times [2021-08-21 12:49:45,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:45,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104325124] [2021-08-21 12:49:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:45,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:49:46,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:46,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104325124] [2021-08-21 12:49:46,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104325124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:46,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966433132] [2021-08-21 12:49:46,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:46,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:46,216 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:46,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:49:54,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:54,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:49:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:55,204 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:55,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:49:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966433132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:55,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:55,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 12:49:55,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037552775] [2021-08-21 12:49:55,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:49:55,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:49:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:49:55,244 INFO L87 Difference]: Start difference. First operand 3266 states and 6475 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:55,826 INFO L93 Difference]: Finished difference Result 4175 states and 8333 transitions. [2021-08-21 12:49:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:49:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:49:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:55,830 INFO L225 Difference]: With dead ends: 4175 [2021-08-21 12:49:55,830 INFO L226 Difference]: Without dead ends: 3965 [2021-08-21 12:49:55,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:49:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-08-21 12:49:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 3365. [2021-08-21 12:49:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9830558858501783) internal successors, (6671), 3364 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6671 transitions. [2021-08-21 12:49:55,860 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6671 transitions. Word has length 36 [2021-08-21 12:49:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:55,861 INFO L470 AbstractCegarLoop]: Abstraction has 3365 states and 6671 transitions. [2021-08-21 12:49:55,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6671 transitions. [2021-08-21 12:49:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:49:55,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:55,863 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:55,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:56,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:49:56,065 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1696868312, now seen corresponding path program 131 times [2021-08-21 12:49:56,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:56,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114939193] [2021-08-21 12:49:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:56,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:56,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:56,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114939193] [2021-08-21 12:49:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114939193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:56,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442104851] [2021-08-21 12:49:56,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:56,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:56,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:56,581 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:56,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:50:04,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:50:04,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:04,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:05,913 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:50:05,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:50:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:05,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442104851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:05,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:05,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-08-21 12:50:05,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254913819] [2021-08-21 12:50:05,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:50:05,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:05,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:50:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:50:05,956 INFO L87 Difference]: Start difference. First operand 3365 states and 6671 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:06,387 INFO L93 Difference]: Finished difference Result 4689 states and 9411 transitions. [2021-08-21 12:50:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:50:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:50:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:06,393 INFO L225 Difference]: With dead ends: 4689 [2021-08-21 12:50:06,393 INFO L226 Difference]: Without dead ends: 4636 [2021-08-21 12:50:06,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:50:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-08-21 12:50:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3305. [2021-08-21 12:50:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 1.9842615012106537) internal successors, (6556), 3304 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 6556 transitions. [2021-08-21 12:50:06,427 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 6556 transitions. Word has length 36 [2021-08-21 12:50:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:06,428 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 6556 transitions. [2021-08-21 12:50:06,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 6556 transitions. [2021-08-21 12:50:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:50:06,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:06,430 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:06,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:06,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:50:06,649 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1143483454, now seen corresponding path program 132 times [2021-08-21 12:50:06,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:06,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329043649] [2021-08-21 12:50:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:06,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:07,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:07,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329043649] [2021-08-21 12:50:07,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329043649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:07,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851822129] [2021-08-21 12:50:07,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:07,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:07,276 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:50:15,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:50:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:15,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:16,514 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:50:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:50:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:16,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851822129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:16,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:16,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-08-21 12:50:16,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593414532] [2021-08-21 12:50:16,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:50:16,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:16,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:50:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:50:16,555 INFO L87 Difference]: Start difference. First operand 3305 states and 6556 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:17,044 INFO L93 Difference]: Finished difference Result 4776 states and 9560 transitions. [2021-08-21 12:50:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:50:17,044 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:50:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:17,049 INFO L225 Difference]: With dead ends: 4776 [2021-08-21 12:50:17,049 INFO L226 Difference]: Without dead ends: 4713 [2021-08-21 12:50:17,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:50:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-08-21 12:50:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3323. [2021-08-21 12:50:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3323 states, 3322 states have (on average 1.9837447320891028) internal successors, (6590), 3322 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3323 states to 3323 states and 6590 transitions. [2021-08-21 12:50:17,086 INFO L78 Accepts]: Start accepts. Automaton has 3323 states and 6590 transitions. Word has length 36 [2021-08-21 12:50:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 3323 states and 6590 transitions. [2021-08-21 12:50:17,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3323 states and 6590 transitions. [2021-08-21 12:50:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:50:17,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:17,088 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:17,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:17,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-21 12:50:17,314 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash 178054172, now seen corresponding path program 133 times [2021-08-21 12:50:17,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:17,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580720846] [2021-08-21 12:50:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:17,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:17,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:17,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580720846] [2021-08-21 12:50:17,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580720846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:17,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313346287] [2021-08-21 12:50:17,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:17,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:17,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:17,818 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:17,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:50:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:25,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:27,053 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:50:27,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:50:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313346287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:27,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:27,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:50:27,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562783797] [2021-08-21 12:50:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:50:27,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:50:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:50:27,091 INFO L87 Difference]: Start difference. First operand 3323 states and 6590 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:27,537 INFO L93 Difference]: Finished difference Result 4422 states and 8873 transitions. [2021-08-21 12:50:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:50:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:50:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:27,542 INFO L225 Difference]: With dead ends: 4422 [2021-08-21 12:50:27,542 INFO L226 Difference]: Without dead ends: 4363 [2021-08-21 12:50:27,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:50:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-21 12:50:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3338. [2021-08-21 12:50:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9838178004195386) internal successors, (6620), 3337 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6620 transitions. [2021-08-21 12:50:27,575 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6620 transitions. Word has length 36 [2021-08-21 12:50:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:27,575 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 6620 transitions. [2021-08-21 12:50:27,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6620 transitions. [2021-08-21 12:50:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:50:27,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:27,577 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:27,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:27,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:27,793 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1180994310, now seen corresponding path program 134 times [2021-08-21 12:50:27,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:27,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565054325] [2021-08-21 12:50:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:27,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:28,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:28,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565054325] [2021-08-21 12:50:28,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565054325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:28,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396715614] [2021-08-21 12:50:28,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:28,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:28,312 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:28,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:50:36,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:36,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:36,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:37,914 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:50:37,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:50:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:37,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396715614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:37,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:37,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:50:37,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048391149] [2021-08-21 12:50:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:50:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:50:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:50:37,955 INFO L87 Difference]: Start difference. First operand 3338 states and 6620 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:38,435 INFO L93 Difference]: Finished difference Result 4014 states and 8010 transitions. [2021-08-21 12:50:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:50:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:50:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:38,439 INFO L225 Difference]: With dead ends: 4014 [2021-08-21 12:50:38,440 INFO L226 Difference]: Without dead ends: 3990 [2021-08-21 12:50:38,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:50:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-08-21 12:50:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3338. [2021-08-21 12:50:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9838178004195386) internal successors, (6620), 3337 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6620 transitions. [2021-08-21 12:50:38,472 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6620 transitions. Word has length 36 [2021-08-21 12:50:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:38,472 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 6620 transitions. [2021-08-21 12:50:38,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6620 transitions. [2021-08-21 12:50:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:50:38,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:38,475 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:38,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:38,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:50:38,689 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash 417024382, now seen corresponding path program 135 times [2021-08-21 12:50:38,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:38,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174821611] [2021-08-21 12:50:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:38,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:39,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:39,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174821611] [2021-08-21 12:50:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174821611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:39,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168130019] [2021-08-21 12:50:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:39,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:39,180 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:50:47,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:50:47,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:47,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:48,988 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:50:48,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 12:50:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168130019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:49,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:49,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:50:49,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275743689] [2021-08-21 12:50:49,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:50:49,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:50:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:50:49,029 INFO L87 Difference]: Start difference. First operand 3338 states and 6620 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:49,441 INFO L93 Difference]: Finished difference Result 4025 states and 8033 transitions. [2021-08-21 12:50:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:50:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:50:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:49,445 INFO L225 Difference]: With dead ends: 4025 [2021-08-21 12:50:49,446 INFO L226 Difference]: Without dead ends: 4000 [2021-08-21 12:50:49,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:50:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-08-21 12:50:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 3338. [2021-08-21 12:50:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9838178004195386) internal successors, (6620), 3337 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6620 transitions. [2021-08-21 12:50:49,476 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6620 transitions. Word has length 36 [2021-08-21 12:50:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:49,476 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 6620 transitions. [2021-08-21 12:50:49,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6620 transitions. [2021-08-21 12:50:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:50:49,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:49,478 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:49,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 12:50:49,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:49,705 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash 943795958, now seen corresponding path program 136 times [2021-08-21 12:50:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:49,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40671569] [2021-08-21 12:50:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:49,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:50:50,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:50,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40671569] [2021-08-21 12:50:50,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40671569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:50,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685533329] [2021-08-21 12:50:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:50,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:50,160 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:50,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:50:59,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:59,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:59,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:00,013 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:00,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685533329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:00,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:00,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-08-21 12:51:00,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138935526] [2021-08-21 12:51:00,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:51:00,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:51:00,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:51:00,055 INFO L87 Difference]: Start difference. First operand 3338 states and 6620 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 12:51:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:00,584 INFO L93 Difference]: Finished difference Result 4180 states and 8338 transitions. [2021-08-21 12:51:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:51:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 36 [2021-08-21 12:51:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:00,590 INFO L225 Difference]: With dead ends: 4180 [2021-08-21 12:51:00,590 INFO L226 Difference]: Without dead ends: 3955 [2021-08-21 12:51:00,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:51:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-08-21 12:51:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3413. [2021-08-21 12:51:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 1.9838804220398594) internal successors, (6769), 3412 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 6769 transitions. [2021-08-21 12:51:00,627 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 6769 transitions. Word has length 36 [2021-08-21 12:51:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:00,627 INFO L470 AbstractCegarLoop]: Abstraction has 3413 states and 6769 transitions. [2021-08-21 12:51:00,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 12:51:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 6769 transitions. [2021-08-21 12:51:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:00,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:00,629 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:00,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:00,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:00,852 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash -530176146, now seen corresponding path program 137 times [2021-08-21 12:51:00,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:00,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375911851] [2021-08-21 12:51:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:00,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:01,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:01,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375911851] [2021-08-21 12:51:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375911851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:01,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293579917] [2021-08-21 12:51:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:01,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:01,378 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:51:09,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:51:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:09,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:09,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:10,963 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:10,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:11,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293579917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:11,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-08-21 12:51:11,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954083266] [2021-08-21 12:51:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:51:11,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:51:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:51:11,006 INFO L87 Difference]: Start difference. First operand 3413 states and 6769 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:11,327 INFO L93 Difference]: Finished difference Result 4692 states and 9420 transitions. [2021-08-21 12:51:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:51:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:11,332 INFO L225 Difference]: With dead ends: 4692 [2021-08-21 12:51:11,332 INFO L226 Difference]: Without dead ends: 4639 [2021-08-21 12:51:11,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:51:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-08-21 12:51:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3401. [2021-08-21 12:51:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.9838235294117648) internal successors, (6745), 3400 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 6745 transitions. [2021-08-21 12:51:11,367 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 6745 transitions. Word has length 36 [2021-08-21 12:51:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 6745 transitions. [2021-08-21 12:51:11,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 6745 transitions. [2021-08-21 12:51:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:11,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:11,370 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:11,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:11,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-08-21 12:51:11,597 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash 924439384, now seen corresponding path program 138 times [2021-08-21 12:51:11,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:11,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673461454] [2021-08-21 12:51:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:11,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:12,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:12,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673461454] [2021-08-21 12:51:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673461454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:12,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472670492] [2021-08-21 12:51:12,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:12,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:12,045 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:12,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:51:21,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:51:21,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:21,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:21,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:22,033 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472670492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:22,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:22,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-08-21 12:51:22,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389334294] [2021-08-21 12:51:22,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:51:22,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:51:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:51:22,073 INFO L87 Difference]: Start difference. First operand 3401 states and 6745 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:22,517 INFO L93 Difference]: Finished difference Result 4452 states and 8906 transitions. [2021-08-21 12:51:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:51:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:22,522 INFO L225 Difference]: With dead ends: 4452 [2021-08-21 12:51:22,522 INFO L226 Difference]: Without dead ends: 4399 [2021-08-21 12:51:22,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:51:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2021-08-21 12:51:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 3419. [2021-08-21 12:51:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 1.984201287302516) internal successors, (6782), 3418 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 6782 transitions. [2021-08-21 12:51:22,552 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 6782 transitions. Word has length 36 [2021-08-21 12:51:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:22,552 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 6782 transitions. [2021-08-21 12:51:22,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 6782 transitions. [2021-08-21 12:51:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:22,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:22,554 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:22,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:22,769 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1776455120, now seen corresponding path program 139 times [2021-08-21 12:51:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:22,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786244106] [2021-08-21 12:51:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:22,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:23,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:23,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786244106] [2021-08-21 12:51:23,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786244106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:23,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108471327] [2021-08-21 12:51:23,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:23,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:23,306 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:23,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:51:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:32,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:33,384 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:33,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108471327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:33,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:33,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-08-21 12:51:33,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748886512] [2021-08-21 12:51:33,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:51:33,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:51:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:51:33,425 INFO L87 Difference]: Start difference. First operand 3419 states and 6782 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:33,859 INFO L93 Difference]: Finished difference Result 4654 states and 9336 transitions. [2021-08-21 12:51:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:33,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:51:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:33,863 INFO L225 Difference]: With dead ends: 4654 [2021-08-21 12:51:33,863 INFO L226 Difference]: Without dead ends: 4589 [2021-08-21 12:51:33,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:51:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-08-21 12:51:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3413. [2021-08-21 12:51:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 1.9835873388042204) internal successors, (6768), 3412 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 6768 transitions. [2021-08-21 12:51:33,895 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 6768 transitions. Word has length 36 [2021-08-21 12:51:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:33,895 INFO L470 AbstractCegarLoop]: Abstraction has 3413 states and 6768 transitions. [2021-08-21 12:51:33,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 6768 transitions. [2021-08-21 12:51:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:33,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:33,898 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:33,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:34,125 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2048990286, now seen corresponding path program 140 times [2021-08-21 12:51:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:34,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426732272] [2021-08-21 12:51:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:34,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:34,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:34,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426732272] [2021-08-21 12:51:34,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426732272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:34,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633940233] [2021-08-21 12:51:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:34,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:34,700 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:34,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:51:43,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:43,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:43,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:44,437 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:44,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633940233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:44,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:44,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 12:51:44,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678100895] [2021-08-21 12:51:44,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:51:44,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:51:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:51:44,477 INFO L87 Difference]: Start difference. First operand 3413 states and 6768 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:44,862 INFO L93 Difference]: Finished difference Result 4437 states and 8891 transitions. [2021-08-21 12:51:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:51:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:44,867 INFO L225 Difference]: With dead ends: 4437 [2021-08-21 12:51:44,867 INFO L226 Difference]: Without dead ends: 4378 [2021-08-21 12:51:44,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:51:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4378 states. [2021-08-21 12:51:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4378 to 3401. [2021-08-21 12:51:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.983529411764706) internal successors, (6744), 3400 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 6744 transitions. [2021-08-21 12:51:44,900 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 6744 transitions. Word has length 36 [2021-08-21 12:51:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:44,900 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 6744 transitions. [2021-08-21 12:51:44,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 6744 transitions. [2021-08-21 12:51:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:44,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:44,903 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:44,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:45,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:51:45,117 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1046050148, now seen corresponding path program 141 times [2021-08-21 12:51:45,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:45,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129148845] [2021-08-21 12:51:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:45,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:45,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:45,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129148845] [2021-08-21 12:51:45,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129148845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:45,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168401994] [2021-08-21 12:51:45,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:45,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:45,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:45,556 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:45,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:51:54,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:51:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:54,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:55,488 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:51:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:51:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:55,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168401994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:55,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:55,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 12:51:55,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307531962] [2021-08-21 12:51:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:51:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:51:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:51:55,527 INFO L87 Difference]: Start difference. First operand 3401 states and 6744 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:55,879 INFO L93 Difference]: Finished difference Result 4117 states and 8215 transitions. [2021-08-21 12:51:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:51:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:55,885 INFO L225 Difference]: With dead ends: 4117 [2021-08-21 12:51:55,885 INFO L226 Difference]: Without dead ends: 4093 [2021-08-21 12:51:55,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 604.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:51:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-08-21 12:51:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 3401. [2021-08-21 12:51:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.983529411764706) internal successors, (6744), 3400 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 6744 transitions. [2021-08-21 12:51:55,919 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 6744 transitions. Word has length 36 [2021-08-21 12:51:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:55,919 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 6744 transitions. [2021-08-21 12:51:55,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 6744 transitions. [2021-08-21 12:51:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:51:55,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:55,921 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:55,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:56,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:51:56,130 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1810020076, now seen corresponding path program 142 times [2021-08-21 12:51:56,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:56,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110213229] [2021-08-21 12:51:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:56,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:56,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110213229] [2021-08-21 12:51:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110213229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040447267] [2021-08-21 12:51:56,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:56,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:56,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:56,546 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:56,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:52:05,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:05,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:52:05,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:06,811 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:52:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:52:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:06,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040447267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:06,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:06,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 12:52:06,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607748130] [2021-08-21 12:52:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:52:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:52:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:52:06,844 INFO L87 Difference]: Start difference. First operand 3401 states and 6744 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:07,398 INFO L93 Difference]: Finished difference Result 4092 states and 8166 transitions. [2021-08-21 12:52:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:52:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:52:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:07,402 INFO L225 Difference]: With dead ends: 4092 [2021-08-21 12:52:07,402 INFO L226 Difference]: Without dead ends: 4067 [2021-08-21 12:52:07,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:52:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-08-21 12:52:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3398. [2021-08-21 12:52:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 1.9832204886664704) internal successors, (6737), 3397 states have internal predecessors, (6737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 6737 transitions. [2021-08-21 12:52:07,435 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 6737 transitions. Word has length 36 [2021-08-21 12:52:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:07,435 INFO L470 AbstractCegarLoop]: Abstraction has 3398 states and 6737 transitions. [2021-08-21 12:52:07,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 6737 transitions. [2021-08-21 12:52:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:52:07,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:07,438 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:07,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:07,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 12:52:07,651 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash -57221762, now seen corresponding path program 143 times [2021-08-21 12:52:07,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:07,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885585468] [2021-08-21 12:52:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:07,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:08,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885585468] [2021-08-21 12:52:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885585468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316335654] [2021-08-21 12:52:08,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:08,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:08,141 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:08,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:52:17,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:52:17,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:17,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:52:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:18,387 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:52:18,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 46 [2021-08-21 12:52:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316335654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:18,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:18,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 12:52:18,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611414274] [2021-08-21 12:52:18,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:52:18,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:52:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:52:18,426 INFO L87 Difference]: Start difference. First operand 3398 states and 6737 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 12:52:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:18,946 INFO L93 Difference]: Finished difference Result 3977 states and 7911 transitions. [2021-08-21 12:52:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:52:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 36 [2021-08-21 12:52:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:18,951 INFO L225 Difference]: With dead ends: 3977 [2021-08-21 12:52:18,951 INFO L226 Difference]: Without dead ends: 3942 [2021-08-21 12:52:18,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:52:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-08-21 12:52:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3438. [2021-08-21 12:52:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 1.9828338667442538) internal successors, (6815), 3437 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 6815 transitions. [2021-08-21 12:52:18,979 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 6815 transitions. Word has length 36 [2021-08-21 12:52:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:18,979 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 6815 transitions. [2021-08-21 12:52:18,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 12:52:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 6815 transitions. [2021-08-21 12:52:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:18,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:18,982 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:19,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:19,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:19,197 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash -720007176, now seen corresponding path program 144 times [2021-08-21 12:52:19,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:19,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096810341] [2021-08-21 12:52:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:19,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:52:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096810341] [2021-08-21 12:52:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096810341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947630780] [2021-08-21 12:52:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:19,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:19,567 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:19,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:52:25,526 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 12:52:25,526 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:52:26,566 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:52:26,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:26,727 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-21 12:52:26,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2021-08-21 12:52:26,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:26,767 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while executing Executor. [2021-08-21 12:52:26,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:52:26,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:52:26,771 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:52:26,771 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:52:26,772 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:52:26 BasicIcfg [2021-08-21 12:52:26,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:52:26,773 INFO L168 Benchmark]: Toolchain (without parser) took 881127.21 ms. Allocated memory was 208.7 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 189.7 MB in the beginning and 1.0 GB in the end (delta: -823.5 MB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 208.7 MB. Free memory is still 190.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 208.7 MB. Free memory was 189.6 MB in the beginning and 188.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 INFO L168 Benchmark]: Boogie Preprocessor took 13.03 ms. Allocated memory is still 208.7 MB. Free memory was 188.2 MB in the beginning and 187.2 MB in the end (delta: 947.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 INFO L168 Benchmark]: RCFGBuilder took 268.68 ms. Allocated memory is still 208.7 MB. Free memory was 187.1 MB in the beginning and 174.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 INFO L168 Benchmark]: TraceAbstraction took 880819.78 ms. Allocated memory was 208.7 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 173.7 MB in the beginning and 1.0 GB in the end (delta: -839.6 MB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 12:52:26,773 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 0.10 ms. Allocated memory is still 208.7 MB. Free memory is still 190.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 208.7 MB. Free memory was 189.6 MB in the beginning and 188.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.03 ms. Allocated memory is still 208.7 MB. Free memory was 188.2 MB in the beginning and 187.2 MB in the end (delta: 947.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.68 ms. Allocated memory is still 208.7 MB. Free memory was 187.1 MB in the beginning and 174.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 880819.78 ms. Allocated memory was 208.7 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 173.7 MB in the beginning and 1.0 GB in the end (delta: -839.6 MB). Peak memory consumption was 2.5 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 880720.5ms, OverallIterations: 150, TraceHistogramMax: 6, EmptinessCheckTime: 265.2ms, AutomataDifference: 69782.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9855 SDtfs, 17033 SDslu, 120034 SDs, 0 SdLazy, 84112 SolverSat, 2940 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44264.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7419 GetRequests, 3127 SyntacticMatches, 371 SemanticMatches, 3921 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28107 ImplicationChecksByTransitivity, 87377.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3438occurred in iteration=149, InterpolantAutomatonStates: 3542, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2590.0ms AutomataMinimizationTime, 149 MinimizatonAttempts, 103896 StatesRemovedByMinimization, 148 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 521.2ms SsaConstructionTime, 3063.4ms SatisfiabilityAnalysisTime, 178541.1ms InterpolantComputationTime, 9688 NumberOfCodeBlocks, 9688 NumberOfCodeBlocksAsserted, 633 NumberOfCheckSat, 9394 ConstructedInterpolants, 745 QuantifiedInterpolants, 240280 SizeOfPredicates, 788 NumberOfNonLiveVariables, 11707 ConjunctsInSsa, 6492 ConjunctsInUnsatCore, 294 InterpolantComputations, 4 PerfectInterpolantSequences, 395/12744 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